| Arm ★ Designs technology that lies at the heart of advanced digital products. This technology powers wireless, networking, consumer entertainment, imaging, automotive, security, and storage devices. Mike Muller (1990) Designs technology that lies at the heart of advanced digital products. This technology powers wireless, networking, consumer entertainment, imaging, automotive, security, and storage devices. | Mike Muller | 1990 | Active | $210.2bn |
| FORE Systems Produced Asynchronous Transfer Mode (ATM) network interface cards and adapters for various computer systems. Robert Sansom (1990) Produced Asynchronous Transfer Mode (ATM) network interface cards and adapters for various computer systems. | Robert Sansom | 1990 | Acquired | $4.8bn |
| Sophos ★ Provides anti-virus protection. Jan Hruska (1985) Provides anti-virus protection. | Jan Hruska | 1985 | Active | $4.3bn |
| Improbable.io ★ Develops SpatialOS, a distributed operating system. This system makes building simulated worlds possible. Herman Narula, Robert Whitehead (2012) Develops SpatialOS, a distributed operating system. This system makes building simulated worlds possible. | Herman Narula, Robert Whitehead | 2012 | Active | $3.8bn |
| Micro Focus Provides innovative software that allows companies to develop, test, deploy, assess, and modernize business-critical enterprise applications. Stewart Lang (1976) Provides innovative software that allows companies to develop, test, deploy, assess, and modernize business-critical enterprise applications. | Stewart Lang | 1976 | Active | $2.4bn |
| Rivos ★ Aims to build industry-leading power efficient, high performance, secure server solutions based on RISC-V, using workload-defined hardware. Mark Hayter (2021) Aims to build industry-leading power efficient, high performance, secure server solutions based on RISC-V, using workload-defined hardware. | Mark Hayter | 2021 | Acquired | $2.0bn |
| Jagex ★ Operates as an independent developer and publisher of online games. Andrew Gower (2001) Operates as an independent developer and publisher of online games. | Andrew Gower | 2001 | Active | $1.2bn |
| Raspberry Pi ★ Promotes the study of computer science in schools and develops a single-board computer. Jack Lang, Robert Mullins, Alan Mycroft, Eben Upton (2009) Promotes the study of computer science in schools and develops a single-board computer. | Jack Lang, Robert Mullins, Alan Mycroft, Eben Upton | 2009 | Active | $1.0bn |
| Superhuman ▲ Rahul Vohra (2015) | Rahul Vohra | 2015 | Active | $902m |
| XenSource ★ Provided enterprise-grade virtual infrastructure solutions. Simon Crosby, Keir Fraser, Steven Hand, Ian Pratt (2005) Provided enterprise-grade virtual infrastructure solutions. | Simon Crosby, Keir Fraser, Steven Hand, Ian Pratt | 2005 | Acquired | $550m |
| PolyAI ★ Creates conversational user interfaces for third-party products and services. Provides an integrated solution for voice or chat-based semantic search, recommendation, and proactive sales. Nikola Mrksic (2017) Creates conversational user interfaces for third-party products and services. Provides an integrated solution for voice or chat-based semantic search, recommendation, and proactive sales. | Nikola Mrksic | 2017 | Active | $541m |
| Basis Communications Designed arket chips and other components used in networking equipment. Gavin Stark (1998) Designed arket chips and other components used in networking equipment. | Gavin Stark | 1998 | Acquired | $496m |
| DeepMap Mark Wheeler (2016) | Mark Wheeler | 2016 | Acquired | $469m |
| DeepMind Technologies ★ Combined techniques from machine learning and systems neuroscience to build powerful general-purpose learning algorithms. Demis Hassabis (2010) Combined techniques from machine learning and systems neuroscience to build powerful general-purpose learning algorithms. | Demis Hassabis | 2010 | Acquired | $438m |
| DisplayLink ★▲ Provided semiconductor and software used in globally branded PC accessories, such as wired and wireless USB graphics adapters, universal docking stations, monitors, and zero clients. Quentin Stafford-Fraser (2003) Provided semiconductor and software used in globally branded PC accessories, such as wired and wireless USB graphics adapters, universal docking stations, monitors, and zero clients. | Quentin Stafford-Fraser | 2003 | Acquired | $332m |
| Codian ★ Developed and manufactured high-performance video and voice over IP communications equipment. David Holloway, Will MacDonald (2003) Developed and manufactured high-performance video and voice over IP communications equipment. | David Holloway, Will MacDonald | 2003 | Acquired | $295m |
| SwiftKey (TouchType Ltd) ★ Offered solutions to improve the experience of typing on a touchscreen phone. Ben Medlock (2008) Offered solutions to improve the experience of typing on a touchscreen phone. | Ben Medlock | 2008 | Acquired | $275m |
| Bromium ★▲ Provided enterprise security and virtualization solutions. Simon Crosby, Ian Pratt (2010) Provided enterprise security and virtualization solutions. | Simon Crosby, Ian Pratt | 2010 | Acquired | $264m |
| Grapeshot Provided brand safety and pre-bid contextual solutions to leading marketers. Martin Porter (2002) Provided brand safety and pre-bid contextual solutions to leading marketers. | Martin Porter | 2002 | Acquired | $201m |
| Speechmatics Provides world-beating speech recognition technology using the latest Machine Learning technology. Tony Robinson (2006) Provides world-beating speech recognition technology using the latest Machine Learning technology. | Tony Robinson | 2006 | Active | $176m |
| Element Builds secure, decentralized communication solutions on top of an open standard communication protocol. Aims to cement the open communication layer of the open Web. Matthew Hodgson (2017) Builds secure, decentralized communication solutions on top of an open standard communication protocol. Aims to cement the open communication layer of the open Web. | Matthew Hodgson | 2017 | Active | $166m |
| Cambridge Broadband ▲ Provides market-leading point-to-multipoint wireless backhaul and access solutions. Andy Hopper (2000) Provides market-leading point-to-multipoint wireless backhaul and access solutions. | Andy Hopper | 2000 | Active | $132m |
| Zeus Technology ▲ Delivered high-performance software-based load balancing and traffic management solutions for virtual and cloud environments. Damian Reeves, Adam Twiss (1995) Delivered high-performance software-based load balancing and traffic management solutions for virtual and cloud environments. | Damian Reeves, Adam Twiss | 1995 | Acquired | $121m |
| Starleaf Will MacDonald (2008) | Will MacDonald | 2008 | Inactive | $104m |
| Focal Point Positioning Creates revolutionary technologies that upgrade the capability of all GNSS systems worldwide. Ramsey Faragher (2015) Creates revolutionary technologies that upgrade the capability of all GNSS systems worldwide. | Ramsey Faragher | 2015 | Active | $102m |
| Masabi ▲ Develops mobile ticketing technology for the transport sector. Tom Godber, Sean Mullaney (2001) Develops mobile ticketing technology for the transport sector. | Tom Godber, Sean Mullaney | 2001 | Active | $91m |
| FeedHenry Provided cloud-based mobile application solutions for enterprise use. Mícheál Ó Foghlú (2008) Provided cloud-based mobile application solutions for enterprise use. | Mícheál Ó Foghlú | 2008 | Acquired | $71m |
| nCipher Developed hardware and software internet security products. Nicko van Someren (1999) Developed hardware and software internet security products. | Nicko van Someren | 1999 | Acquired | $68m |
| Sano Genetics (previously Heterogeneous) Will Jones (2017) | Will Jones | 2017 | Active | $64m |
| Synthesized.io Uses AI to learn the structure of original data. Simulates practically useful new data points, thus unleashing data's full potential while protecting people's privacy. Alexander Kuhnle (2018) Uses AI to learn the structure of original data. Simulates practically useful new data points, thus unleashing data's full potential while protecting people's privacy. | Alexander Kuhnle | 2018 | Active | $55m |
| Beauhurst Provides organizations with high-quality data, tools, and analysis. Toby Austin (2010) Provides organizations with high-quality data, tools, and analysis. | Toby Austin | 2010 | Active | $54m |
| GeoSpock Provided a platform to power mobile apps. Steven Marsh (2013) Provided a platform to power mobile apps. | Steven Marsh | 2013 | Inactive | $51m |
| Trent AI Addresses the problem of security issues created by self-writing software. Ensures that increased software development does not result in increased cyber threats. (2025) Addresses the problem of security issues created by self-writing software. Ensures that increased software development does not result in increased cyber threats. | — | 2025 | Active | $46m |
| Generative Engineering Reduces the time and cost of physical engineering. Utilizes an open platform combined with advanced optimization algorithms, cloud computing, and next-generation user interfaces. Nick Boultbee (2023) Reduces the time and cost of physical engineering. Utilizes an open platform combined with advanced optimization algorithms, cloud computing, and next-generation user interfaces. | Nick Boultbee | 2023 | Active | $43m |
| Xapien Provides a fully automated online platform for conducting background research on companies and individuals for risk and reputational protection. Utilizes cutting-edge Artificial Intelligence and Language Processing to search unstructured sources like international media and legal sites, producing comprehensive reports quickly. Daniel Secretan (2018) Provides a fully automated online platform for conducting background research on companies and individuals for risk and reputational protection. Utilizes cutting-edge Artificial Intelligence and Language Processing to search unstructured sources like international media and legal sites, producing comprehensive reports quickly. | Daniel Secretan | 2018 | Active | $38m |
| Fluent Specializes in digital product design and development of web applications. Alan Mitchell (2007) Specializes in digital product design and development of web applications. | Alan Mitchell | 2007 | Active | $35m |
| re:infer Provided an artificial intelligence solution that offered structured, human-like understanding of B2C conversations. Marius Cobzarenco (2015) Provided an artificial intelligence solution that offered structured, human-like understanding of B2C conversations. | Marius Cobzarenco | 2015 | Inactive | $29m |
| Evi Created technology for automatic question answering and natural language understanding. Developed one of the first voice assistants. William Tunstall-Pedoe (2005) Created technology for automatic question answering and natural language understanding. Developed one of the first voice assistants. | William Tunstall-Pedoe | 2005 | Acquired | $28m |
| Questionmark Provides high-quality testing and assessment software and support services. John Kleeman (1988) Provides high-quality testing and assessment software and support services. | John Kleeman | 1988 | Active | $25m |
| Recorder Provides cloud-first, AI-enabled commercial insurance broker management software. (2024) Provides cloud-first, AI-enabled commercial insurance broker management software. | — | 2024 | Active | $20m |
| TypeDB ▲ Provides a strongly-typed database with a rich and logical type system. Empowers engineers to solve complex problems using TypeQL as the query language. Haikal Pribadi (2015) Provides a strongly-typed database with a rich and logical type system. Empowers engineers to solve complex problems using TypeQL as the query language. | Haikal Pribadi | 2015 | Active | $15m |
| Involve Education (Practice Pal) James King (2023) | James King | 2023 | Active | $14m |
| Aluma Applies machine learning and other techniques to intelligent document processing. George Harpur (2009) Applies machine learning and other techniques to intelligent document processing. | George Harpur | 2009 | Active | $14m |
| Kinhub An AI-enabled health and wellbeing platform that empowers working lives by supporting personal journeys. It helps organizations retain and engage diverse workforces and develop empathetic managers through coaching-based support. Helen Yannakoudakis (2019) An AI-enabled health and wellbeing platform that empowers working lives by supporting personal journeys. It helps organizations retain and engage diverse workforces and develop empathetic managers through coaching-based support. | Helen Yannakoudakis | 2019 | Active | $14m |
| Acunu Provided real-time Big Data analytics, database, and storage software. Tim Moreton, Tom Wilkie, Andy Twigg (2009) Provided real-time Big Data analytics, database, and storage software. | Tim Moreton, Tom Wilkie, Andy Twigg | 2009 | Inactive | $12m |
| Adaptive Broadband Developed a wireless broadband technology. Andy Hopper (1997) Developed a wireless broadband technology. | Andy Hopper | 1997 | Acquired | $12m |
| IPV Limited Supplying low bit-rate, frame-accurate video technology. Andy Hopper (1996) Supplying low bit-rate, frame-accurate video technology. | Andy Hopper | 1996 | Active | $12m |
| PetaGene ▲ Helps life sciences companies and institutions tackle complex problems. Dan Greenfield (2016) Helps life sciences companies and institutions tackle complex problems. | Dan Greenfield | 2016 | Active | $12m |
| Calipsa Uses advanced Deep Learning algorithms. Transforms video monitoring and analysis worldwide. Rashid Khan (2016) Uses advanced Deep Learning algorithms. Transforms video monitoring and analysis worldwide. | Rashid Khan | 2016 | Active | $11m |
| Encore Operated as an online network built for musicians, facilitating the process of finding and booking musicians for events. James King, James McAulay (2014) Operated as an online network built for musicians, facilitating the process of finding and booking musicians for events. | James King, James McAulay | 2014 | Inactive | $11m |
| VyperCore Provided processor acceleration technology that sped up high-performance compute workloads in data centers by implementing the runtime in silicon. Russell Haggar (2022) Provided processor acceleration technology that sped up high-performance compute workloads in data centers by implementing the runtime in silicon. | Russell Haggar | 2022 | Inactive | $11m |
| RoboK Develops 3D perception and localization modules at the edge. Chao Gao, Liangchuan Gu (2017) Develops 3D perception and localization modules at the edge. | Chao Gao, Liangchuan Gu | 2017 | Active | $9m |
| ChipFlow Democratizes custom microchip design by empowering OEMs to create tailored integrated circuits (ICs) through a cost-effective platform. The approach leverages existing software expertise within companies, enabling rapid prototyping and development of custom IC solutions. Rob Taylor (2021) Democratizes custom microchip design by empowering OEMs to create tailored integrated circuits (ICs) through a cost-effective platform. The approach leverages existing software expertise within companies, enabling rapid prototyping and development of custom IC solutions. | Rob Taylor | 2021 | Active | $8m |
| Clusterfudge Builds a new, AI-first supercomputer scheduler. George Thomas (2023) Builds a new, AI-first supercomputer scheduler. | George Thomas | 2023 | Active | $8m |
| CatchApp Operates as a unique scheduling application. Eliminates the need for email back-and-forth when setting up meetings. Oliver Lamming (2015) Operates as a unique scheduling application. Eliminates the need for email back-and-forth when setting up meetings. | Oliver Lamming | 2015 | Active | $7m |
| OmniBuds Builds cuffless blood-pressure earbuds that combine in-ear optical and acoustic signals with on-device processing. Enables convenient and clinically meaningful hypertension screening and management by turning short measurements into a continuous picture of cardiovascular health. (2024) Builds cuffless blood-pressure earbuds that combine in-ear optical and acoustic signals with on-device processing. Enables convenient and clinically meaningful hypertension screening and management by turning short measurements into a continuous picture of cardiovascular health. | — | 2024 | Active | $7m |
| Wedissmo Operates as a wedding services marketplace. Makes the entire process easy and hassle-free, saving couples time and money. Oliver Lamming (2024) Operates as a wedding services marketplace. Makes the entire process easy and hassle-free, saving couples time and money. | Oliver Lamming | 2024 | Active | $7m |
| Versed AI Provides visibility of a supply chain down to the nth tier. Uses natural language processing and machine learning to uncover complex supply chain networks, identifying risk concentrations and sub-tier suppliers. Supports intelligent decision making, operational efficiency, procurement, and regulatory compliance. Simon Baker (2019) Provides visibility of a supply chain down to the nth tier. Uses natural language processing and machine learning to uncover complex supply chain networks, identifying risk concentrations and sub-tier suppliers. Supports intelligent decision making, operational efficiency, procurement, and regulatory compliance. | Simon Baker | 2019 | Active | $6m |
| Eluceda Applies cutting-edge technologies to suitable markets. Initially focused on detecting pathogens, such as MRSA, using simple point-of-care tests. Peter Cowley (2009) Applies cutting-edge technologies to suitable markets. Initially focused on detecting pathogens, such as MRSA, using simple point-of-care tests. | Peter Cowley | 2009 | Active | $5m |
| Hubbub Creates fundraising movements around organizations. Jonathan May (2011) Creates fundraising movements around organizations. | Jonathan May | 2011 | Active | $5m |
| auryx ▲ Turns ordinary earbuds into health sensors through the use of cutting-edge artificial intelligence. (2025) Turns ordinary earbuds into health sensors through the use of cutting-edge artificial intelligence. | — | 2025 | Active | $4m |
| Reconfigure.io Was a developer platform for cloud FPGA. Robert Taylor (2015) Was a developer platform for cloud FPGA. | Robert Taylor | 2015 | Inactive | $4m |
| Planetary Processing Ltd Provided a service to small and medium game studios by offering a platform that simplified the creation and operation of large online games, handling the necessary infrastructure. Samuel Sully (2022) Provided a service to small and medium game studios by offering a platform that simplified the creation and operation of large online games, handling the necessary infrastructure. | Samuel Sully | 2022 | Inactive | $4m |
| iKVA ★ Provides knowledge management solutions for unstructured data, delivering the right information to the right people at the right time. Richard Mortier, Liang Wang, Jon Crowcroft (2017) Provides knowledge management solutions for unstructured data, delivering the right information to the right people at the right time. | Richard Mortier, Liang Wang, Jon Crowcroft | 2017 | Active | $4m |
| First AI Talent Helps companies thrive with enterprise-ready AI talent delivered as a service. Trains and deploys top AI professionals into mid to large enterprises, offering specialist tracks like AI Agent Engineers and AI Adoption Managers. (2024) Helps companies thrive with enterprise-ready AI talent delivered as a service. Trains and deploys top AI professionals into mid to large enterprises, offering specialist tracks like AI Agent Engineers and AI Adoption Managers. | — | 2024 | Active | $4m |
| Charisma.ai Provides creative AI to simplify and accelerate interactive storytelling production. Also supplies an engine that enables audiences to participate in the story, interact with characters, and maintain a personalized narrative relationship. Ben Salili-James (2015) Provides creative AI to simplify and accelerate interactive storytelling production. Also supplies an engine that enables audiences to participate in the story, interact with characters, and maintain a personalized narrative relationship. | Ben Salili-James | 2015 | Active | $3m |
| Bytemark Offered internet hosting services. Matthew Bloch, Peter Taphouse (2002) Offered internet hosting services. | Matthew Bloch, Peter Taphouse | 2002 | Acquired | $2m |
| Bantr Served as an online social network for football fans, allowing users to watch games, predict results, and share comments. Toby Austin (2010) Served as an online social network for football fans, allowing users to watch games, predict results, and share comments. | Toby Austin | 2010 | Inactive | $2m |
| Xsilon Developed ultra-reliable In-Home M2M connectivity. Russell Haggar (2008) Developed ultra-reliable In-Home M2M connectivity. | Russell Haggar | 2008 | Inactive | $2m |
| Spektrix Powerful and easy-to-use box office software accessed via the internet. Michael Nabarro (2008) Powerful and easy-to-use box office software accessed via the internet. | Michael Nabarro | 2008 | Active | $2m |
| Health2Works Operates as an eHealth prototyping company, working with the NHS. Roger Marlow (2010) Operates as an eHealth prototyping company, working with the NHS. | Roger Marlow | 2010 | Active | $1m |
| Rormix Was a free app that allowed users to discover new emerging music videos from independent and unsigned artists. Mark Wheeler (2013) Was a free app that allowed users to discover new emerging music videos from independent and unsigned artists. | Mark Wheeler | 2013 | Inactive | $1m |
| F-LEX Legal Ltd Provides technology-driven products for the legal sector. James Moore (2016) Provides technology-driven products for the legal sector. | James Moore | 2016 | Active | $1m |
| CodeThink Delivers effective technology solutions for international sectors including finance, medical, telecoms, aerospace, and automotive. Robert Taylor (2007) Delivers effective technology solutions for international sectors including finance, medical, telecoms, aerospace, and automotive. | Robert Taylor | 2007 | Active | $1m |
| FusePump Enabled the extraction of product information from e-commerce websites. Robert Durkin, Chris Conn (2009) Enabled the extraction of product information from e-commerce websites. | Robert Durkin, Chris Conn | 2009 | Inactive | $0m |
| Tractable ★ Applies state-of-the-art deep learning technology to automate expert tasks for the enterprise. Razvan Ranca (2014) Applies state-of-the-art deep learning technology to automate expert tasks for the enterprise. | Razvan Ranca | 2014 | Active | $0m |
| 1248 Enabled companies to put their products online at scale without requiring extensive coding. Provided services as experienced developers of connected products. Pilgrim Beart (2013) Enabled companies to put their products online at scale without requiring extensive coding. Provided services as experienced developers of connected products. | Pilgrim Beart | 2013 | Inactive | — |
| Acorn Computer Produced a number of computers, including the BBC Micro. Andy Hopper (1979) Produced a number of computers, including the BBC Micro. | Andy Hopper | 1979 | Inactive | — |
| Active Media Solutions Deployed complex database-driven websites, allowing information to be easily classified and searched rather than being statically encoded as HTML. John Bates, Giles Nelson (1995) Deployed complex database-driven websites, allowing information to be easily classified and searched rather than being statically encoded as HTML. | John Bates, Giles Nelson | 1995 | Inactive | — |
| Actuarial Solutions Ltd Provides software tools and consultancy for actuarial applications. Martin Barringer (1999) Provides software tools and consultancy for actuarial applications. | Martin Barringer | 1999 | Active | — |
| Advanced Rendering Technology Designed and developed leading-edge computer graphics technology. Daniel Hall, Adrian Wrigley (1995) Designed and developed leading-edge computer graphics technology. | Daniel Hall, Adrian Wrigley | 1995 | Inactive | — |
| Adventiq Operates a VNC-based system-on-a-chip. Andy Hopper (2005) Operates a VNC-based system-on-a-chip. | Andy Hopper | 2005 | Active | — |
| Aesthetic Integration Formal verification technology analyzes the safety, fairness, and regulatory compliance of financial algorithms for banks, funds, and regulators. Grant Olney Passmore (2014) Formal verification technology analyzes the safety, fairness, and regulatory compliance of financial algorithms for banks, funds, and regulators. | Grant Olney Passmore | 2014 | Active | — |
| Agathon Limited Pioneers category-defining AI products through novel human-AI interaction paradigms to transform business operations. Combines deep NLP expertise with commercial deployment experience to deliver strategic AI transformation, sophisticated agent and LLM implementations, and executive AI training. (2023) Pioneers category-defining AI products through novel human-AI interaction paradigms to transform business operations. Combines deep NLP expertise with commercial deployment experience to deliver strategic AI transformation, sophisticated agent and LLM implementations, and executive AI training. | — | 2023 | Active | — |
| AI Sequrity Ltd Provides developers and enterprises a painless and stress-free deployment of AI that is secure by design. Tooling allows deployment of AI agents with guaranteed security. Supports on-premise deployment and complex policy use-cases, enabling precise, fine-grained controls. (2025) Provides developers and enterprises a painless and stress-free deployment of AI that is secure by design. Tooling allows deployment of AI agents with guaranteed security. Supports on-premise deployment and complex policy use-cases, enabling precise, fine-grained controls. | — | 2025 | Active | — |
| Aircloak Allowed large companies to analyze vast amounts of private and sensitive data about individuals while ensuring privacy compliance. Sebastian Probst Eide (2014) Allowed large companies to analyze vast amounts of private and sensitive data about individuals while ensuring privacy compliance. | Sebastian Probst Eide | 2014 | Inactive | — |
| Amino Communications Develops core software technologies and customer-premises products for the IPTV market. Paul Fellows (1998) Develops core software technologies and customer-premises products for the IPTV market. | Paul Fellows | 1998 | Active | — |
| Angani Provides cloud services across East Africa (KE, UG, RW, TZ). Ripduman Sohan (2013) Provides cloud services across East Africa (KE, UG, RW, TZ). | Ripduman Sohan | 2013 | Active | — |
| Angel Alerts Ltd Helped individuals manage their digital legacy by securing online passwords, accounts, and offline records, and facilitating their transfer to designated executors after death. Dinan Gunawardena (2012) Helped individuals manage their digital legacy by securing online passwords, accounts, and offline records, and facilitating their transfer to designated executors after death. | Dinan Gunawardena | 2012 | Inactive | — |
| Anidium Develops a simple and affordable remote test for Atrial Fibrillation, a key heart rhythm condition associated with high risk of stroke and heart failure. Igor Drokov (2015) Develops a simple and affordable remote test for Atrial Fibrillation, a key heart rhythm condition associated with high risk of stroke and heart failure. | Igor Drokov | 2015 | Active | — |
| Annexable Microelectronics Jonathan May (2010) | Jonathan May | 2010 | Inactive | — |
| Anondesign Specializes in the development of bespoke software, web applications, and database systems. Conchur Dickinson, Simon Freytag (1999) Specializes in the development of bespoke software, web applications, and database systems. | Conchur Dickinson, Simon Freytag | 1999 | Active | — |
| AnswerGrid Builds Generative AI solutions for consulting and professional services, including an enterprise search tool for consultants. Noah Ohrner (2024) Builds Generative AI solutions for consulting and professional services, including an enterprise search tool for consultants. | Noah Ohrner | 2024 | Active | — |
| ANT Provided software solutions and services to TV device vendors, broadcasters, and operators, supporting millions of deployed units worldwide. Nicko van Someren FREng (1992) Provided software solutions and services to TV device vendors, broadcasters, and operators, supporting millions of deployed units worldwide. | Nicko van Someren FREng | 1992 | Inactive | — |
| Anvil ▲ A Python-based drag-and-drop web application builder. Ian Davies, Meredydd Luff (2015) A Python-based drag-and-drop web application builder. | Ian Davies, Meredydd Luff | 2015 | Active | — |
| Apama Provided next-generation trading strategy management technologies, allowing traders to instantly and continuously analyze, evaluate, and respond to market events. John Bates, Giles Nelson (1999) Provided next-generation trading strategy management technologies, allowing traders to instantly and continuously analyze, evaluate, and respond to market events. | John Bates, Giles Nelson | 1999 | Acquired | — |
| APM Ltd Specialized in the technology and application of networked and distributed IT systems. Andrew Herbert (1985) Specialized in the technology and application of networked and distributed IT systems. | Andrew Herbert | 1985 | Acquired | — |
| AppChocolate Creates innovative and fun mobile applications, ranging from Advent calendars to sports coverage. Oliver Lamming (2014) Creates innovative and fun mobile applications, ranging from Advent calendars to sports coverage. | Oliver Lamming | 2014 | Active | — |
| Applied Generics Developed software capable of gathering information through the GSM network. Joe Dixon, Bruce Adam, Ian Atkinson (1999) Developed software capable of gathering information through the GSM network. | Joe Dixon, Bruce Adam, Ian Atkinson | 1999 | Acquired | — |
| AQrex Provided a web-based platform utilized for various research products. Conchur Dickinson (2007) Provided a web-based platform utilized for various research products. | Conchur Dickinson | 2007 | Inactive | — |
| Artimi Developed silicon solutions for ultra wideband technologies. Jack Lang (2002) Developed silicon solutions for ultra wideband technologies. | Jack Lang | 2002 | Acquired | — |
| Arva AI Provides AI-enabled business verification for banks and fintechs, making financial compliance faster, cheaper, and more secure. Oliver Wales (2024) Provides AI-enabled business verification for banks and fintechs, making financial compliance faster, cheaper, and more secure. | Oliver Wales | 2024 | Active | — |
| Axiomatic Technology Ltd Installs automatic internet-connected people counters and provides statistics about shop footfall, as well as office and university room and desk usage. David Moore (1994) Installs automatic internet-connected people counters and provides statistics about shop footfall, as well as office and university room and desk usage. | David Moore | 1994 | Active | — |
| Axxeltrova Functions as a specialist Investment Bank focused on technology and telecommunications. Faisal Ahmed (2009) Functions as a specialist Investment Bank focused on technology and telecommunications. | Faisal Ahmed | 2009 | Active | — |
| Azuro Pioneered a paradigm shift in the digital implementation and optimization of next-generation SoCs. Paul Cunningham, Steeve Wilcox (2002) Pioneered a paradigm shift in the digital implementation and optimization of next-generation SoCs. | Paul Cunningham, Steeve Wilcox | 2002 | Acquired | — |
| Bango ▲ Provides technology that powers commerce for businesses targeting the growing market of internet-enabled mobile phone users. Ray Anderson (1999) Provides technology that powers commerce for businesses targeting the growing market of internet-enabled mobile phone users. | Ray Anderson | 1999 | Active | — |
| BERI Open Systems (2013) | — | 2013 | Inactive | — |
| BERI Open Systems CIC Supported the community of academic, educational, industrial, and hobbyist users of open-source hardware-software designs, such as the BERI processor. Ben Laurie, Simon Moore, Robert Watson (2013) Supported the community of academic, educational, industrial, and hobbyist users of open-source hardware-software designs, such as the BERI processor. | Ben Laurie, Simon Moore, Robert Watson | 2013 | Unknown | — |
| Bid Management Ltd Provided major bid support and improved bid and sales performance for carriers and technology companies. Paul Beard (2002) Provided major bid support and improved bid and sales performance for carriers and technology companies. | Paul Beard | 2002 | Inactive | — |
| Biodot Ltd Operates as an inkjet printing company of biological materials for making bio-medical rapid diagnostic tests. P Shaw (1987) Operates as an inkjet printing company of biological materials for making bio-medical rapid diagnostic tests. | P Shaw | 1987 | Active | — |
| BitX (Luno) Operated as the first Bitcoin/Rand exchange. Nicholas Pilkington (2013) Operated as the first Bitcoin/Rand exchange. | Nicholas Pilkington | 2013 | Acquired | — |
| blinkx Operated as a large and advanced video search engine. Suranga Chandratillake (2004) Operated as a large and advanced video search engine. | Suranga Chandratillake | 2004 | Inactive | — |
| Blue Compass Owned and operated a portfolio of recruitment and networking websites spanning the UK's Arts and Media industry. Chris Timms (2003) Owned and operated a portfolio of recruitment and networking websites spanning the UK's Arts and Media industry. | Chris Timms | 2003 | Inactive | — |
| Blue technologies Created software solutions that combined mobile and enterprise technologies. Tom Godber, Sean Mullaney (2001) Created software solutions that combined mobile and enterprise technologies. | Tom Godber, Sean Mullaney | 2001 | Inactive | — |
| Boldport Created development tools designed for hardware engineers. Saar Drimer (2010) Created development tools designed for hardware engineers. | Saar Drimer | 2010 | Inactive | — |
| break-step productions Kona Macphee (2001) | Kona Macphee | 2001 | Inactive | — |
| Browser to Buyer Consulting services that help online businesses increase sales and revenue by using research to understand user buying barriers and creating/split testing new versions of pages. Dave Gowans (2016) Consulting services that help online businesses increase sales and revenue by using research to understand user buying barriers and creating/split testing new versions of pages. | Dave Gowans | 2016 | Active | — |
| Business Web Software Developed software applications for web and intranet use. Grant Husbands, Giles Mitton (2001) Developed software applications for web and intranet use. | Grant Husbands, Giles Mitton | 2001 | Inactive | — |
| CacheLogic Developed one of the first P2P caching solutions and later transformed into a P2P assisted Content Delivery Network. Adam Twiss (2002) Developed one of the first P2P caching solutions and later transformed into a P2P assisted Content Delivery Network. | Adam Twiss | 2002 | Acquired | — |
| Cambridge Coding Academy Developed adaptive learning technology to personalize computer science education. Andrius Aucinas, Raoul-Gabriel Urma (2014) Developed adaptive learning technology to personalize computer science education. | Andrius Aucinas, Raoul-Gabriel Urma | 2014 | Inactive | — |
| Cambridge Cyber Limited Operates as a consultancy. Provides penetration testing and security training. Frank Stajano, Graham Rymer (2016) Operates as a consultancy. Provides penetration testing and security training. | Frank Stajano, Graham Rymer | 2016 | Active | — |
| Cambridge Ring Served as a non-profit, independent members' association for staff and graduates of the Cambridge University Computer Laboratory. Stephen Allott, Ian Leslie (2002) Served as a non-profit, independent members' association for staff and graduates of the Cambridge University Computer Laboratory. | Stephen Allott, Ian Leslie | 2002 | Active | — |
| Cambridge Spark Empowers organizations to achieve business goals. Educates current and future workforces in Data Science and Artificial Intelligence. Raoul-Gabriel Urma (2016) Empowers organizations to achieve business goals. Educates current and future workforces in Data Science and Artificial Intelligence. | Raoul-Gabriel Urma | 2016 | Active | — |
| Cambridge Visual Networks Developed cloud-based digital signage. Quentin Stafford-Fraser (2007) Developed cloud-based digital signage. | Quentin Stafford-Fraser | 2007 | Inactive | — |
| Camdata Ltd Designs and manufactures computer equipment for difficult environments. Also produces networking electronics for security uses. Peter Cowley (1984) Designs and manufactures computer equipment for difficult environments. Also produces networking electronics for security uses. | Peter Cowley | 1984 | Active | — |
| Camrivox Delivered products for unifying telephony with On Demand and premise based CRM solutions. Jonathan Custance, James Green (2005) Delivered products for unifying telephony with On Demand and premise based CRM solutions. | Jonathan Custance, James Green | 2005 | Inactive | — |
| Cantab Wireless Provided consulting services in wireless communications and new emerging wireless technologies. Juha Korhonen (2007) Provided consulting services in wireless communications and new emerging wireless technologies. | Juha Korhonen | 2007 | Inactive | — |
| Capabilities Limited Provides operating-system, network, and security consultancy. Ben Laurie, Robert Watson (2011) Provides operating-system, network, and security consultancy. | Ben Laurie, Robert Watson | 2011 | Active | — |
| Carrington Computer Consultants Ltd Pioneered the use of Personal Computers to displace specialist hardware, minis and mainframes in commercial and industrial applications. Tim Coote, Graham Pattie (1982) Pioneered the use of Personal Computers to displace specialist hardware, minis and mainframes in commercial and industrial applications. | Tim Coote, Graham Pattie | 1982 | Inactive | — |
| Cedalion Was a leading technical consultancy based in Edinburgh. Chris Galley (1995) Was a leading technical consultancy based in Edinburgh. | Chris Galley | 1995 | Acquired | — |
| Censeo Systems Produced product lifecycle management software for mobile service providers. Peter Jones (2003) Produced product lifecycle management software for mobile service providers. | Peter Jones | 2003 | Inactive | — |
| Climate Code Foundation Promoted the public understanding of climate science. Nick Barnes (2010) Promoted the public understanding of climate science. | Nick Barnes | 2010 | Inactive | — |
| CoFarm Foundation Brings people together to grow and share delicious, nutritious food. Helps build stronger, healthier ecosystems and communities. Laura James (2018) Brings people together to grow and share delicious, nutritious food. Helps build stronger, healthier ecosystems and communities. | Laura James | 2018 | Active | — |
| Cognitive Solutions AG Developed data science solutions for industrial applications. Stefan G Hild (2016) Developed data science solutions for industrial applications. | Stefan G Hild | 2016 | Acquired | — |
| Collabora Operates as a global consultancy, specializing in delivering the benefits of Open Source software to the commercial world. Robert McQueen, Robert Taylor (2005) Operates as a global consultancy, specializing in delivering the benefits of Open Source software to the commercial world. | Robert McQueen, Robert Taylor | 2005 | Active | — |
| Contengo Provided bespoke software and SAAS products to the professional services industry, and developed an identity management platform for the broader market. Charles Southey (2020) Provided bespoke software and SAAS products to the professional services industry, and developed an identity management platform for the broader market. | Charles Southey | 2020 | Unknown | — |
| Contengo Provided bespoke software and SAAS products to the professional services industry, and developed an identity management platform for the broader market. (2019) Provided bespoke software and SAAS products to the professional services industry, and developed an identity management platform for the broader market. | — | 2019 | Active | — |
| Corral Provided a transportation service offering door-to-door travel with other riders heading in the same direction. Noam Szpiro (2012) Provided a transportation service offering door-to-door travel with other riders heading in the same direction. | Noam Szpiro | 2012 | Inactive | — |
| Cotares Developed initial projects in the areas of Vehicle Information Systems and Broadband Wireless. Alan Jones (2002) Developed initial projects in the areas of Vehicle Information Systems and Broadband Wireless. | Alan Jones | 2002 | Inactive | — |
| CPlane Operated as a network optimization software vendor. Ian Leslie, Simon Crosby (1999) Operated as a network optimization software vendor. | Ian Leslie, Simon Crosby | 1999 | Inactive | — |
| Creature House Developed software in computer graphics. Alex Hsu Siu Chi (1994) Developed software in computer graphics. | Alex Hsu Siu Chi | 1994 | Acquired | — |
| Cronto Provided secure transaction authentication solutions for internet banking. Igor Drokov (2005) Provided secure transaction authentication solutions for internet banking. | Igor Drokov | 2005 | Acquired | — |
| Cube AI Brings supply chain into the age of AI. Uses autonomous AI agents that automate back-office tasks, cutting operating costs. Louis de Benoist (2023) Brings supply chain into the age of AI. Uses autonomous AI agents that automate back-office tasks, cutting operating costs. | Louis de Benoist | 2023 | Active | — |
| Cunning Running Software Develops high-quality software solutions in the defense and homeland security markets. Christopher Barrington Brown (1988) Develops high-quality software solutions in the defense and homeland security markets. | Christopher Barrington Brown | 1988 | Active | — |
| Curious Software Developed groundbreaking animation and visual content creation software for the broadcast television, video, and presentation industries. Justin Wise (1999) Developed groundbreaking animation and visual content creation software for the broadcast television, video, and presentation industries. | Justin Wise | 1999 | Inactive | — |
| D2 Legal Technology Provides legal change and data consulting, operating at the intersection of FinTech and LegalTech. Akber Datoo (2011) Provides legal change and data consulting, operating at the intersection of FinTech and LegalTech. | Akber Datoo | 2011 | Active | — |
| DataCore Software Provides storage hypervisor and storage virtualization services. Nick Connolly (1998) Provides storage hypervisor and storage virtualization services. | Nick Connolly | 1998 | Active | — |
| Datanomic Developed data quality solutions. Richard Marsh (2001) Developed data quality solutions. | Richard Marsh | 2001 | Acquired | — |
| Datoral.com Provided a cloud platform that allowed users to gain insights from data in seconds. David Mack (2013) Provided a cloud platform that allowed users to gain insights from data in seconds. | David Mack | 2013 | Inactive | — |
| Detective Hero Ran outdoor murder mystery events via a GPS-based application. Jonathan Goddard (2020) Ran outdoor murder mystery events via a GPS-based application. | Jonathan Goddard | 2020 | Inactive | — |
| Devyce Inc. Uses AI to reinvent the business VoIP system. Edward Clayton (2020) Uses AI to reinvent the business VoIP system. | Edward Clayton | 2020 | Active | — |
| Digital Mail Provides telecommunications services. Robert Darwin (1991) Provides telecommunications services. | Robert Darwin | 1991 | Active | — |
| Digitivity Specialized in Java and e-commerce. Andrew Herbert (1996) Specialized in Java and e-commerce. | Andrew Herbert | 1996 | Acquired | — |
| Disguise Built a hardware/software platform that allowed show creators to visualize productions in minute detail and helped deliver the show on large-scale physical canvases. Ashraf Nehru (2003) Built a hardware/software platform that allowed show creators to visualize productions in minute detail and helped deliver the show on large-scale physical canvases. | Ashraf Nehru | 2003 | Unknown | — |
| dividiti Provided tools and services for performance analysis, modeling, and tuning of heterogeneous computing systems. Anton Lokhmotov (2014) Provided tools and services for performance analysis, modeling, and tuning of heterogeneous computing systems. | Anton Lokhmotov | 2014 | Inactive | — |
| DroneDeploy A smart drone management platform that simplifies drone operations. Nicholas Pilkington (2013) A smart drone management platform that simplifies drone operations. | Nicholas Pilkington | 2013 | Active | — |
| DuffGun Ltd Operated as an internet and mobile software development consultancy. Dinan Gunawardena (2012) Operated as an internet and mobile software development consultancy. | Dinan Gunawardena | 2012 | Inactive | — |
| eCosCentric Further technical and commercial development of eCos and RedBoot technologies. Nick Garnett, Jonathan Larmour (2002) Further technical and commercial development of eCos and RedBoot technologies. | Nick Garnett, Jonathan Larmour | 2002 | Active | — |
| Egis.ly Provides consultancy services promoting stewardship in business. Craig Dean (2019) Provides consultancy services promoting stewardship in business. | Craig Dean | 2019 | Active | — |
| Electric Software Sold CBT software for Microsoft Office, Windows, and major software packages for single users and corporate networks. Jeff Fenton (2009) Sold CBT software for Microsoft Office, Windows, and major software packages for single users and corporate networks. | Jeff Fenton | 2009 | Inactive | — |
| Electronic Share Information Was one of the first online brokerage services. Jack Lang (1993) Was one of the first online brokerage services. | Jack Lang | 1993 | Acquired | — |
| Elixir Studios Was a video games developer. Demis Hassabis (1998) Was a video games developer. | Demis Hassabis | 1998 | Inactive | — |
| Ellexus ▲ Detected library and tool chain dependencies, providing a world-class enterprise solution. Rosemary Francis (2010) Detected library and tool chain dependencies, providing a world-class enterprise solution. | Rosemary Francis | 2010 | Inactive | — |
| Embecosm Provides world-class software engineering that encompasses embedded software development and hardware modeling. Jeremy Bennett (2008) Provides world-class software engineering that encompasses embedded software development and hardware modeling. | Jeremy Bennett | 2008 | Active | — |
| Embue Provided whole building intelligence and automation for multifamily apartment portfolios, addressing climate, productivity, and wellness challenges. Robert Cooper (2015) Provided whole building intelligence and automation for multifamily apartment portfolios, addressing climate, productivity, and wellness challenges. | Robert Cooper | 2015 | Inactive | — |
| emotif.ai Amplified the creative process by using AI to write content based on ideas, and provided tools that assessed the impact of the generated content. Rory Waite (2019) Amplified the creative process by using AI to write content based on ideas, and provided tools that assessed the impact of the generated content. | Rory Waite | 2019 | Inactive | — |
| Emotiful Inc Served as a sharing and lifestyle recommendation service, aiming to be a platform for sharing lifestyle photos. Dinan Gunawardena (2013) Served as a sharing and lifestyle recommendation service, aiming to be a platform for sharing lifestyle photos. | Dinan Gunawardena | 2013 | Inactive | — |
| Encoded Media Developed streaming solutions for capturing, delivering, and managing rich media content over computer networks. Tom Sillence (2003) Developed streaming solutions for capturing, delivering, and managing rich media content over computer networks. | Tom Sillence | 2003 | Inactive | — |
| English Language iTutoring Provided cloud-based automated language tutoring and assessment services. Ted Briscoe (2014) Provided cloud-based automated language tutoring and assessment services. | Ted Briscoe | 2014 | Acquired | — |
| English Language iTutoring Provided cloud-based automated language tutoring and assessment services. (2014) Provided cloud-based automated language tutoring and assessment services. | — | 2014 | Inactive | — |
| Envisional Helped organizations detect and guard against threats such as counterfeiting, piracy, fraud, and online brand abuse. Ben Coppin (1999) Helped organizations detect and guard against threats such as counterfeiting, piracy, fraud, and online brand abuse. | Ben Coppin | 1999 | Inactive | — |
| ePlantData Inc Provided software connectivity solutions for the process industry. Rurik Turton Provided software connectivity solutions for the process industry. | Rurik Turton | — | Inactive | — |
| EPT Computing Developed a service for automatically testing websites across various browsers. Martin Kleppmann (2007) Developed a service for automatically testing websites across various browsers. | Martin Kleppmann | 2007 | Acquired | — |
| Equisys ▲ Provides leading business communications solutions. Chris Oswald, Gareth Williams (1987) Provides leading business communications solutions. | Chris Oswald, Gareth Williams | 1987 | Active | — |
| Eshinui Inc Focused on the design, development, and implementation of Comprehensive Tracking Logistics Management, enabling significant improvements in manufacturing efficiency. Carl Dellar (2000) Focused on the design, development, and implementation of Comprehensive Tracking Logistics Management, enabling significant improvements in manufacturing efficiency. | Carl Dellar | 2000 | Inactive | — |
| Ethicronics Offers innovative secure software products to enable better electronics hardware. Provides sector agnostic hardware assurance (cybersecurity) for fabless companies. Franck Courbon (2022) Offers innovative secure software products to enable better electronics hardware. Provides sector agnostic hardware assurance (cybersecurity) for fabless companies. | Franck Courbon | 2022 | Active | — |
| Evertrack Operated as an information systems and marketing consultancy. Dominic Edmonds (1994) Operated as an information systems and marketing consultancy. | Dominic Edmonds | 1994 | Inactive | — |
| EXAPSYS Develops innovative heterogeneous High Performance Computing (HPC) systems incorporating novel CPUs, efficient reconfigurable resources, and advanced Math and AI accelerators. Yannis Papaefstathiou (2019) Develops innovative heterogeneous High Performance Computing (HPC) systems incorporating novel CPUs, efficient reconfigurable resources, and advanced Math and AI accelerators. | Yannis Papaefstathiou | 2019 | Active | — |
| Exbiblio Allowed users to find the corresponding digital version for printed documents. Quentin Stafford-Fraser (2004) Allowed users to find the corresponding digital version for printed documents. | Quentin Stafford-Fraser | 2004 | Acquired | — |
| Factmata Builds artificial intelligence solutions to tackle fake news. Andreas Vlachos (2016) Builds artificial intelligence solutions to tackle fake news. | Andreas Vlachos | 2016 | Active | — |
| Fantasy Football Exchange Founded to take on the US giants of daily fantasy sports. Lorenzo Wood (2014) Founded to take on the US giants of daily fantasy sports. | Lorenzo Wood | 2014 | Inactive | — |
| Felicite.com Inc Was a leading provider of gift registry technology and related services. Hans Hsu (1999) Was a leading provider of gift registry technology and related services. | Hans Hsu | 1999 | Acquired | — |
| Fen Research Creates groundbreaking new technology and products in the field of online games and user-created content. Andrew Gower (2010) Creates groundbreaking new technology and products in the field of online games and user-created content. | Andrew Gower | 2010 | Active | — |
| Fendragon Ltd Operated as a consultancy specializing in text processing and related areas. John Harradine, Mick Jordan, David Kindersley, Peter Robinson, Neil Wiseman (1977) Operated as a consultancy specializing in text processing and related areas. | John Harradine, Mick Jordan, David Kindersley, Peter Robinson, Neil Wiseman | 1977 | Inactive | — |
| Fidgety Lizard Limited Kona Macphee (2015) | Kona Macphee | 2015 | Active | — |
| Filonet Korea Incorporated Provided information security consulting and collaboration solutions. Jong-Hyeon Lee (2000) Provided information security consulting and collaboration solutions. | Jong-Hyeon Lee | 2000 | Inactive | — |
| Finfo Ltd Facilitated employee engagement and communication for businesses, and provided expense management, analytics, and reporting services. Stu McLellan (2018) Facilitated employee engagement and communication for businesses, and provided expense management, analytics, and reporting services. | Stu McLellan | 2018 | Inactive | — |
| First DBS Ltd Delivered high quality tailored services as an independent consultancy. Andy Rawson (1985) Delivered high quality tailored services as an independent consultancy. | Andy Rawson | 1985 | Inactive | — |
| Flower Labs ▲ An open-source framework for training AI on distributed data using federated learning and other privacy-enhancing technologies. Daniel Beutel, Taner Topal, Nicholas Lane (2020) An open-source framework for training AI on distributed data using federated learning and other privacy-enhancing technologies. | Daniel Beutel, Taner Topal, Nicholas Lane | 2020 | Active | — |
| FountainArc Researches and implements unique theories at the intersection of investing, knowledge, and computer science. Provides institutional clients with advanced machine learning and AI automation tools to minimize risks while maximizing long-term beneficial outcomes. Chi Lee (2018) Researches and implements unique theories at the intersection of investing, knowledge, and computer science. Provides institutional clients with advanced machine learning and AI automation tools to minimize risks while maximizing long-term beneficial outcomes. | Chi Lee | 2018 | Active | — |
| Fraser Research Conducted leading edge, long term, fundamental research in network communication. Sandy Fraser (2002) Conducted leading edge, long term, fundamental research in network communication. | Sandy Fraser | 2002 | Inactive | — |
| Genius 2000 Provides software to solve recreational language problems, including a product that solves and explains cryptic crossword clues. William Tunstall-Pedoe (1998) Provides software to solve recreational language problems, including a product that solves and explains cryptic crossword clues. | William Tunstall-Pedoe | 1998 | Active | — |
| Global Inkjet Systems Provides components for a comprehensive industrial inkjet operating system, including high-performance RIP software, printer drivers, and electronics. Nick Geddes (2006) Provides components for a comprehensive industrial inkjet operating system, including high-performance RIP software, printer drivers, and electronics. | Nick Geddes | 2006 | Active | — |
| Global Software Publishing Was one of the UK's leading consumer software publishers. Jeff Fenton (1985) Was one of the UK's leading consumer software publishers. | Jeff Fenton | 1985 | Acquired | — |
| Globosense Delivered low-carbon technologies for non invasive monitoring and energy efficiency improvement of corporate environments. Marcelo Pias (2009) Delivered low-carbon technologies for non invasive monitoring and energy efficiency improvement of corporate environments. | Marcelo Pias | 2009 | Inactive | — |
| Go Mobile Operates as a cellular mobile operator in Malta. Juanito Camilleri (1999) Operates as a cellular mobile operator in Malta. | Juanito Camilleri | 1999 | Active | — |
| Governor Technology Ltd Produced software applications, website, and email marketing campaigns. John Mannix (2001) Produced software applications, website, and email marketing campaigns. | John Mannix | 2001 | Acquired | — |
| GradChef Provided an online community for Chinese applicants seeking to apply for postgraduate schools globally. Ming Yin (2013) Provided an online community for Chinese applicants seeking to apply for postgraduate schools globally. | Ming Yin | 2013 | Acquired | — |
| GradFutures Operated as a graduate recruitment company. Toby Austin (2007) Operated as a graduate recruitment company. | Toby Austin | 2007 | Inactive | — |
| Great East London Software Specializes in financial electronic communications, focusing on the FIX Protocol. Philip Moore (2002) Specializes in financial electronic communications, focusing on the FIX Protocol. | Philip Moore | 2002 | Active | — |
| Green Custard Offers development, project, and technology consultancy, focusing on hosted web services and mobile applications. Jonathan Custance, James Green (2009) Offers development, project, and technology consultancy, focusing on hosted web services and mobile applications. | Jonathan Custance, James Green | 2009 | Active | — |
| Grex Games Developed Massive-Multiplayer Online Gaming (MMOG) technology. Adam Martin (2001) Developed Massive-Multiplayer Online Gaming (MMOG) technology. | Adam Martin | 2001 | Inactive | — |
| Groopit.com Created a tool that made it fast and easy for people to get together with friends. Tom Griffiths (2006) Created a tool that made it fast and easy for people to get together with friends. | Tom Griffiths | 2006 | Inactive | — |
| GST Technolgies Developed useful programs such as typesetting software and compilers, including Timeworks Publisher and 1st Word for the Atari ST. Jeff Fenton (1979) Developed useful programs such as typesetting software and compilers, including Timeworks Publisher and 1st Word for the Atari ST. | Jeff Fenton | 1979 | Inactive | — |
| HandsetExpert Helps consumers find phones or SIM cards quickly, cheaply, and easily. Assists users in navigating choices and purchasing with confidence to save money. Shahrum Nedjati-Gilani (2014) Helps consumers find phones or SIM cards quickly, cheaply, and easily. Assists users in navigating choices and purchasing with confidence to save money. | Shahrum Nedjati-Gilani | 2014 | Active | — |
| Hindsight Software Ltd Focuses on agile testing techniques, including Acceptance Test Driven Development (ATDD) and Behaviour Driven Development (BDD). Jack Bastow (2012) Focuses on agile testing techniques, including Acceptance Test Driven Development (ATDD) and Behaviour Driven Development (BDD). | Jack Bastow | 2012 | Active | — |
| Hitch Offered an on-demand multi-pickup solution through an iOS app, providing an affordable and convenient transportation service. Noam Szpiro (2014) Offered an on-demand multi-pickup solution through an iOS app, providing an affordable and convenient transportation service. | Noam Szpiro | 2014 | Acquired | — |
| Hone Provides learning and development experiences that are life-changing and career-enhancing for everyone. Tom Griffiths (2018) Provides learning and development experiences that are life-changing and career-enhancing for everyone. | Tom Griffiths | 2018 | Active | — |
| Hubdub Operated premium skills games for sports fans. Tom Griffiths (2007) Operated premium skills games for sports fans. | Tom Griffiths | 2007 | Inactive | — |
| Hyran Technologies Optimizing planning and production for fashion brands using machine learning. This enables suppliers to produce the right inventory at the right time, helping brands reduce waste and improve margins across complex global supply chains. Ahmed Zaidi, Jordan Zhang (2022) Optimizing planning and production for fashion brands using machine learning. This enables suppliers to produce the right inventory at the right time, helping brands reduce waste and improve margins across complex global supply chains. | Ahmed Zaidi, Jordan Zhang | 2022 | Active | — |
| IdeaWorks3D Developed advanced technologies for rich-media mobile applications. Eben Upton (1998) Developed advanced technologies for rich-media mobile applications. | Eben Upton | 1998 | Inactive | — |
| iLexIR Provides natural language processing consultancy and technology development. Ted Briscoe (2003) Provides natural language processing consultancy and technology development. | Ted Briscoe | 2003 | Active | — |
| Imense Ltd Provides advanced software for image and video analysis. Focuses on OCR and ANPR (optical character recognition and automatic number plate recognition). Chris Town (2007) Provides advanced software for image and video analysis. Focuses on OCR and ANPR (optical character recognition and automatic number plate recognition). | Chris Town | 2007 | Active | — |
| In-Silica Producing teleworking collaboration software and supplying IT consultancy via Kynesim, primarily for embedded video applications. Richard Watts (2007) Producing teleworking collaboration software and supplying IT consultancy via Kynesim, primarily for embedded video applications. | Richard Watts | 2007 | Active | — |
| Indigo Panda Labs Inc Built a mobile dating app. Yarden Eitan, Matthew Lent (2014) Built a mobile dating app. | Yarden Eitan, Matthew Lent | 2014 | Inactive | — |
| Infact Ltd Provided consultancy and project management to the financial services industry, specializing in financial trading systems and trade floor design. Mark Jones (1985) Provided consultancy and project management to the financial services industry, specializing in financial trading systems and trade floor design. | Mark Jones | 1985 | Acquired | — |
| Innonation Productions Delivered live music performance. Justin Siu (2004) Delivered live music performance. | Justin Siu | 2004 | Inactive | — |
| Innovation Framework Technologies Helped organizations transform innovation management processes to reduce time-to-market and grow revenues, profits, and market share. Colin Palombo (2006) Helped organizations transform innovation management processes to reduce time-to-market and grow revenues, profits, and market share. | Colin Palombo | 2006 | Inactive | — |
| Insight Studios Provided web and graphic design services for SMEs and start-ups. Tom Griffiths (2004) Provided web and graphic design services for SMEs and start-ups. | Tom Griffiths | 2004 | Inactive | — |
| Invention Marketing Specialized in helping start-ups and technology companies focus their marketing resources where they would have the most impact. Nicky Dibben (1999) Specialized in helping start-ups and technology companies focus their marketing resources where they would have the most impact. | Nicky Dibben | 1999 | Inactive | — |
| Invest Solutions Web software developer John Fawcett, Matthew Parkinson, Andrew Rice (2002) Web software developer | John Fawcett, Matthew Parkinson, Andrew Rice | 2002 | Inactive | — |
| Ionsquare Provided IT consultancy specializing in working with start-ups and spin-off ventures. Oleg Podsechin (2001) Provided IT consultancy specializing in working with start-ups and spin-off ventures. | Oleg Podsechin | 2001 | Inactive | — |
| Ionysys Technology Corporation Provided e-commerce consulting services. Richard Mason (1996) Provided e-commerce consulting services. | Richard Mason | 1996 | Acquired | — |
| Iridian Technologies Leads research, development, and marketing of authentication technologies. These technologies are based on iris recognition. John Daugman (1990) Leads research, development, and marketing of authentication technologies. These technologies are based on iris recognition. | John Daugman | 1990 | Active | — |
| Jakyl Works with indie and small developers. Brings premium games to smartphones, tablets, and emerging platforms. Jeremy Adams (2009) Works with indie and small developers. Brings premium games to smartphones, tablets, and emerging platforms. | Jeremy Adams | 2009 | Active | — |
| Janus Technology Specializes in business-to-business services. These services cover home automation, A/V systems, and mobile technology. Matthew Faupel (2010) Specializes in business-to-business services. These services cover home automation, A/V systems, and mobile technology. | Matthew Faupel | 2010 | Active | — |
| Jawa Soft Is a software development company. Ewan Makepeace (2001) Is a software development company. | Ewan Makepeace | 2001 | Active | — |
| JMEC Provided electronics consultancy and design services. John Moore (1989) Provided electronics consultancy and design services. | John Moore | 1989 | Inactive | — |
| Jobstream Group Provided specialized software solutions to the offshore financial services industry. John Brimacombe (1993) Provided specialized software solutions to the offshore financial services industry. | John Brimacombe | 1993 | Inactive | — |
| JourneyLog Provides an online service for travel mileage expense recording and reporting. Uses data from an Android application. Alasdair Scott (2009) Provides an online service for travel mileage expense recording and reporting. Uses data from an Android application. | Alasdair Scott | 2009 | Active | — |
| Kavanagh Provided IT consulting services and IT infrastructure solutions for data centers. Rob Campbell (1996) Provided IT consulting services and IT infrastructure solutions for data centers. | Rob Campbell | 1996 | Inactive | — |
| KBW Consulting Contract developer for CD-ROM, kiosk and web Nat Billington, Lorenzo Wood (1992) Contract developer for CD-ROM, kiosk and web | Nat Billington, Lorenzo Wood | 1992 | Acquired | — |
| KeyChest Ltd Improved business uptimes using a global, real-time database of all TLS certificates. Dan Cvrcek (2019) Improved business uptimes using a global, real-time database of all TLS certificates. | Dan Cvrcek | 2019 | Inactive | — |
| KnowledgeSpaces Provided technical and strategic consulting, training, and software rental in knowledge management, data science, machine learning/AI, innovation process management, and project management methodology. Jochen L Leidner (2022) Provided technical and strategic consulting, training, and software rental in knowledge management, data science, machine learning/AI, innovation process management, and project management methodology. | Jochen L Leidner | 2022 | Inactive | — |
| Koder.ly Is a software development company. Primarily works in the travel sector. Craig Dean (2000) Is a software development company. Primarily works in the travel sector. | Craig Dean | 2000 | Active | — |
| KRAI Creates a scalable B2B SaaS product for synthesizing ultra-efficient "brains" (neuralware, middleware, hardware) for emerging robotics and Edge AI applications. Anton Lokhmotov (2020) Creates a scalable B2B SaaS product for synthesizing ultra-efficient "brains" (neuralware, middleware, hardware) for emerging robotics and Edge AI applications. | Anton Lokhmotov | 2020 | Active | — |
| Kular A platform that enables lawyers to build and manage their own law firms. Saaras Mehan (2021) A platform that enables lawyers to build and manage their own law firms. | Saaras Mehan | 2021 | Active | — |
| Kular A platform that enables lawyers to build and manage their own law firms. (2021) A platform that enables lawyers to build and manage their own law firms. | — | 2021 | Active | — |
| Leading Technology Inc Developed the first relational database capable of supporting time-series data and multi-dimensional arrays. Peter Jones (1989) Developed the first relational database capable of supporting time-series data and multi-dimensional arrays. | Peter Jones | 1989 | Inactive | — |
| Lemur Consulting Provided information retrieval technology. Richard Boulton (2001) Provided information retrieval technology. | Richard Boulton | 2001 | Inactive | — |
| Level 5 Networks Developed network interface cards, including chips and software Andy Hopper, Steve Pope (2002) Developed network interface cards, including chips and software | Andy Hopper, Steve Pope | 2002 | Acquired | — |
| Lichen AI Ltd Designs AI systems by combining human-centered interaction design, product management, and technology strategy. Helps organizations uncover tacit knowledge and cultural insight within teams, building AI systems that enhance depth. (2025) Designs AI systems by combining human-centered interaction design, product management, and technology strategy. Helps organizations uncover tacit knowledge and cultural insight within teams, building AI systems that enhance depth. | — | 2025 | Active | — |
| Linguamatics ★ Enabled organizations to maximize the value derived from information resources through the deployment of innovative natural language processing (NLP) based technology. Roger Hale, David Milward, James Thomas, Sylvia Knight (2001) Enabled organizations to maximize the value derived from information resources through the deployment of innovative natural language processing (NLP) based technology. | Roger Hale, David Milward, James Thomas, Sylvia Knight | 2001 | Acquired | — |
| Linguit GmbH Specialized in advanced language and speech technology through software development. Jochen Leidner (2001) Specialized in advanced language and speech technology through software development. | Jochen Leidner | 2001 | Inactive | — |
| Listing Monster AI Powers those in the circular economy to sell more online by streamlining the process of producing marketplace listings, maximizing SEO, researching price, and executing a merchandising strategy. James Moore (2023) Powers those in the circular economy to sell more online by streamlining the process of producing marketplace listings, maximizing SEO, researching price, and executing a merchandising strategy. | James Moore | 2023 | Active | — |
| LogicIQ Specialized in IT consultancy, advising startups and early growth phase businesses. Jan Hruska (2006) Specialized in IT consultancy, advising startups and early growth phase businesses. | Jan Hruska | 2006 | Inactive | — |
| Lone Rooftop Operated a Building Intelligence Platform that provided real estate and workplace teams with aggregated utilization data and guided analytics for data-driven decision making. Reinoud Elhorst (2015) Operated a Building Intelligence Platform that provided real estate and workplace teams with aggregated utilization data and guided analytics for data-driven decision making. | Reinoud Elhorst | 2015 | Acquired | — |
| lowRISC ▲ Uses collaborative engineering to develop and maintain open source silicon designs and tools. Rob Mullins, Alex Bradbury, Gavin Ferris (2014) Uses collaborative engineering to develop and maintain open source silicon designs and tools. | Rob Mullins, Alex Bradbury, Gavin Ferris | 2014 | Active | — |
| Lumeter Built technology for pay-as-you-go solar systems, integrating mobile money, SMS, and SaaS management tools. Developed IoT components integrated by partners. Mitra Ardron (2012) Built technology for pay-as-you-go solar systems, integrating mobile money, SMS, and SaaS management tools. Developed IoT components integrated by partners. | Mitra Ardron | 2012 | Active | — |
| Madge Networks Will MacDonald | Will MacDonald | — | Inactive | — |
| MagicSolver Started with a Computer Vision-based Sudoku application and expanded into various other types of applications. Oliver Lamming, Leon Palm (2009) Started with a Computer Vision-based Sudoku application and expanded into various other types of applications. | Oliver Lamming, Leon Palm | 2009 | Inactive | — |
| Mango Health Empowered consumers to take control of their health using fun, elegant, and easy-to-use mobile applications. Gerald Cheong (2012) Empowered consumers to take control of their health using fun, elegant, and easy-to-use mobile applications. | Gerald Cheong | 2012 | Inactive | — |
| Media Dynamics Was a computer consultancy. Gerald Ratzer (1968) Was a computer consultancy. | Gerald Ratzer | 1968 | Inactive | — |
| MessageLabs Provided integrated messaging and web security services. Alex Shipp (1999) Provided integrated messaging and web security services. | Alex Shipp | 1999 | Acquired | — |
| Metanate Provided a range of consultancy, software development, and support services. John Stark (2000) Provided a range of consultancy, software development, and support services. | John Stark | 2000 | Inactive | — |
| Metrica Systems Provided a class-leading management solution for mobile operators. Peter Jones (1993) Provided a class-leading management solution for mobile operators. | Peter Jones | 1993 | Acquired | — |
| Micropraxis Ltd Provides professional software development services. Matthew Faupel (2001) Provides professional software development services. | Matthew Faupel | 2001 | Active | — |
| Midsummer House Was the first restaurant in Cambridge to receive a Michelin Star. Jack Lang (1998) Was the first restaurant in Cambridge to receive a Michelin Star. | Jack Lang | 1998 | Active | — |
| Mitcham Technologies Provided IT-related management consulting services, including temporary IT executive staffing. Richard Mason (1996) Provided IT-related management consulting services, including temporary IT executive staffing. | Richard Mason | 1996 | Inactive | — |
| MJDK Consulting Ltd Was a web development consultancy. Mateusz Jadczak (2016) Was a web development consultancy. | Mateusz Jadczak | 2016 | Inactive | — |
| Monigo Provides payment advance infrastructure and services. Declan Conlon (2020) Provides payment advance infrastructure and services. | Declan Conlon | 2020 | Active | — |
| Moon Express Planned to offer commercial lunar robotic transportation and data services, with a long-term goal of mining the Moon for resources. Barney Pell (2010) Planned to offer commercial lunar robotic transportation and data services, with a long-term goal of mining the Moon for resources. | Barney Pell | 2010 | Inactive | — |
| Mosaic Robotics Ltd Builds autonomous robots that unload loose-loaded parcel trailers. (2025) Builds autonomous robots that unload loose-loaded parcel trailers. | — | 2025 | Active | — |
| Muscat Ltd Developed an information retrieval system. Martin Porter (1995) Developed an information retrieval system. | Martin Porter | 1995 | Acquired | — |
| MyMoneyDog Tracked, organized, and balanced money-spending between friends. Served as a tool for groups of friends or micro-communities, such as housemates, work colleagues, holidaymakers, and teammates. Nicholas Pilkington (2010) Tracked, organized, and balanced money-spending between friends. Served as a tool for groups of friends or micro-communities, such as housemates, work colleagues, holidaymakers, and teammates. | Nicholas Pilkington | 2010 | Inactive | — |
| Ndiyo! Was a project set up to foster an approach to networked computing that was simple, affordable, open, less environmentally damaging, and less dependent on intensive technical support than current networking technology. Quentin Stafford-Fraser (2002) Was a project set up to foster an approach to networked computing that was simple, affordable, open, less environmentally damaging, and less dependent on intensive technical support than current networking technology. | Quentin Stafford-Fraser | 2002 | Inactive | — |
| Nemesys Research Made ATM network video products. Ian Leslie, Derek McAuley, Joe Dixon, Cosmos Nicolaou, Ian Pratt (1994) Made ATM network video products. | Ian Leslie, Derek McAuley, Joe Dixon, Cosmos Nicolaou, Ian Pratt | 1994 | Acquired | — |
| NetChannel Ltd Operated as an internet-over-television company. Jack Lang (1995) Operated as an internet-over-television company. | Jack Lang | 1995 | Acquired | — |
| NetFPGA Supports the community of academic, student, non-profit, industrial, and hobbyist users by providing open-source hardware-software designs, such as a programmable networking platform. Andrew Moore, Robert Watson (2015) Supports the community of academic, student, non-profit, industrial, and hobbyist users by providing open-source hardware-software designs, such as a programmable networking platform. | Andrew Moore, Robert Watson | 2015 | Active | — |
| Netronome Develops highly programmable semiconductor products used for intelligent flow processing in network and communications devices. Niel Viljoen (2003) Develops highly programmable semiconductor products used for intelligent flow processing in network and communications devices. | Niel Viljoen | 2003 | Active | — |
| New Leaf Topco Limited (2017) | — | 2017 | Inactive | — |
| NextBase Ltd Launched AutoRoute, the first consumer route planning system and mapping software for PCs. Mark Atheron, Ian Mercer (1988) Launched AutoRoute, the first consumer route planning system and mapping software for PCs. | Mark Atheron, Ian Mercer | 1988 | Acquired | — |
| nGame Was the channel, content, and technology provider for convergent wireless, PC-web, and Digital Interactive Television (DiTV) community-based games. John Brimacombe (1997) Was the channel, content, and technology provider for convergent wireless, PC-web, and Digital Interactive Television (DiTV) community-based games. | John Brimacombe | 1997 | Inactive | — |
| Nine Tiles Developed equipment for sending time-critical media over digital networks. John Grant (1978) Developed equipment for sending time-critical media over digital networks. | John Grant | 1978 | Inactive | — |
| Northpoint Services Ltd Provided managed services IT solutions. Matt Kingswood (2004) Provided managed services IT solutions. | Matt Kingswood | 2004 | Acquired | — |
| Objectronix Sold managed firewalls and virtualization services to small to medium-sized businesses. Chris Royle (1997) Sold managed firewalls and virtualization services to small to medium-sized businesses. | Chris Royle | 1997 | Inactive | — |
| ObjectSecurity ▲ Provided specialized information security services. Ulrich Lang (1999) Provided specialized information security services. | Ulrich Lang | 1999 | Inactive | — |
| Ocelot Consulting Provided specialist consulting services for Information Technology Management and Property Management. David Wolfram (2014) Provided specialist consulting services for Information Technology Management and Property Management. | David Wolfram | 2014 | Inactive | — |
| Olivetti Research Laboratory Operated as a research institute specializing in computing and telecommunications. Andy Hopper (1986) Operated as a research institute specializing in computing and telecommunications. | Andy Hopper | 1986 | Acquired | — |
| Omnipotent Software Developed and sold web-based software, specifically scripted ASP.NET web controls. Charles Southey (2004) Developed and sold web-based software, specifically scripted ASP.NET web controls. | Charles Southey | 2004 | Inactive | — |
| Operis Plc Advises in project finance, providing expertise in financial modelling, due diligence, and funding advice. David Colver (1997) Advises in project finance, providing expertise in financial modelling, due diligence, and funding advice. | David Colver | 1997 | Active | — |
| OptionExist Functioned as an IT design consultancy. Stephen Love (1993) Functioned as an IT design consultancy. | Stephen Love | 1993 | Inactive | — |
| Orbis Developed networking technologies. Andy Hopper (1978) Developed networking technologies. | Andy Hopper | 1978 | Acquired | — |
| Packet Ship Created software technologies for the management, distribution, and playback of broadcast-quality digital video. Paul Clark (2005) Created software technologies for the management, distribution, and playback of broadcast-quality digital video. | Paul Clark | 2005 | Inactive | — |
| Paradigm Design Systems Developed software tools designed for low power chip design. Paul Cunningham, Steev Wilcox (2001) Developed software tools designed for low power chip design. | Paul Cunningham, Steev Wilcox | 2001 | Inactive | — |
| Patientline Provided a bedside system for patients, offering services such as TV, telephone, and radio. Philip Rushby (1994) Provided a bedside system for patients, offering services such as TV, telephone, and radio. | Philip Rushby | 1994 | Acquired | — |
| PC Communications Ltd Produced easy-to-use communications software systems for the PC market. Philip Rushby (1985) Produced easy-to-use communications software systems for the PC market. | Philip Rushby | 1985 | Inactive | — |
| PCF Ltd Delivered innovative software solutions through the use of QEI Management Reporting and LinearPlus. Richard Jebb (1982) Delivered innovative software solutions through the use of QEI Management Reporting and LinearPlus. | Richard Jebb | 1982 | Acquired | — |
| Perfect Image Provides IT solutions. Andrew Robson (1991) Provides IT solutions. | Andrew Robson | 1991 | Active | — |
| Perihelion Software Ltd Produced an operating system called HeliOS for the INMOS Transputer. Tim King (1986) Produced an operating system called HeliOS for the INMOS Transputer. | Tim King | 1986 | Acquired | — |
| Pirical ▲ Drives better decisions from people data. Hok-Him Poon (2015) Drives better decisions from people data. | Hok-Him Poon | 2015 | Active | — |
| Powerset Developed a semantic search engine. Barney Pell (2006) Developed a semantic search engine. | Barney Pell | 2006 | Acquired | — |
| Projected Games Designs computer games for projection onto a large screen. Philip Hewinson (2005) Designs computer games for projection onto a large screen. | Philip Hewinson | 2005 | Active | — |
| PSDT Provided Perl training and enterprise infrastructure development services. Peter Scott (1999) Provided Perl training and enterprise infrastructure development services. | Peter Scott | 1999 | Inactive | — |
| Pur3 ▲ Provides a complete Software and Hardware Design Service. Not only do we develop software for PCs, Macs, Tablets and mobile phones, but we develop hardware too - including component selection, Circuit + PCB design, embedded software and prototypes. Gordon Williams (2006) Provides a complete Software and Hardware Design Service. Not only do we develop software for PCs, Macs, Tablets and mobile phones, but we develop hardware too - including component selection, Circuit + PCB design, embedded software and prototypes. | Gordon Williams | 2006 | Active | — |
| Qudos Produced CAD software. Andy Hopper (1985) Produced CAD software. | Andy Hopper | 1985 | Inactive | — |
| Rapportive Made a Gmail add-on that displayed social media information about contacts as users emailed them. Martin Kleppmann, Sam Stokes, Rahul Vohra (2010) Made a Gmail add-on that displayed social media information about contacts as users emailed them. | Martin Kleppmann, Sam Stokes, Rahul Vohra | 2010 | Acquired | — |
| RealVNC ★▲ Provides remote access software for desktop and mobile platforms. Andy Harter, Andy Hopper, Tristan Richardson, James Weatherall (2002) Provides remote access software for desktop and mobile platforms. | Andy Harter, Andy Hopper, Tristan Richardson, James Weatherall | 2002 | Active | — |
| Red Glasses Designed and developed apps for iPhone, iPad, and Android. Adam Martin (2009) Designed and developed apps for iPhone, iPad, and Android. | Adam Martin | 2009 | Inactive | — |
| Redbeacon Served as a home services marketplace, allowing users to search, browse, and book local home service providers online. Aaron Lee (2008) Served as a home services marketplace, allowing users to search, browse, and book local home service providers online. | Aaron Lee | 2008 | Acquired | — |
| Robotae Operates as a consultancy specializing in robotics and mechatronics product development. Kevin Rathbone (2014) Operates as a consultancy specializing in robotics and mechatronics product development. | Kevin Rathbone | 2014 | Active | — |
| Rubicon Software Designs, builds, and supports enterprise-class xRM and Microsoft SharePoint collaboration solutions. Alistair Hancock (1989) Designs, builds, and supports enterprise-class xRM and Microsoft SharePoint collaboration solutions. | Alistair Hancock | 1989 | Active | — |
| Saviso Group Provided IT services to corporate clients, including application development, network design, capacity planning, product strategy consulting, and technical support. Adam Twiss (1995) Provided IT services to corporate clients, including application development, network design, capacity planning, product strategy consulting, and technical support. | Adam Twiss | 1995 | Inactive | — |
| Saxonica Develops and markets the Saxon XSLT and XQuery compiler, and participates in the development of related W3C specifications. Michael Kay (2004) Develops and markets the Saxon XSLT and XQuery compiler, and participates in the development of related W3C specifications. | Michael Kay | 2004 | Active | — |
| Seventh String Produces software designed to aid the transcription of music from audio form. Andy Robinson (2003) Produces software designed to aid the transcription of music from audio form. | Andy Robinson | 2003 | Active | — |
| Shadow Robot Company Develops robotics technology, focusing on giving robots human-like manipulation skills. Rich Walker (1997) Develops robotics technology, focusing on giving robots human-like manipulation skills. | Rich Walker | 1997 | Active | — |
| Shape Data Ltd Was a computer-aided design specialist. Ian Braid, Alan Grayer, Charles Lang, Peter Veenman (1974) Was a computer-aided design specialist. | Ian Braid, Alan Grayer, Charles Lang, Peter Veenman | 1974 | Acquired | — |
| Shopfitter Provides tools to set up a secure e-commerce site. Chris Galley (1999) Provides tools to set up a secure e-commerce site. | Chris Galley | 1999 | Active | — |
| Silicon Futures Jonathan May (2009) | Jonathan May | 2009 | Inactive | — |
| Simulacra Provided software and solutions to help clients integrate, categorize, manage, and publish information in an attractive and intuitive way. Patrick Towell (1997) Provided software and solutions to help clients integrate, categorize, manage, and publish information in an attractive and intuitive way. | Patrick Towell | 1997 | Inactive | — |
| Sintefex Audio Dedicated to the innovative research, development, and manufacturing of digital audio products for professional users. Mike Kemp (1997) Dedicated to the innovative research, development, and manufacturing of digital audio products for professional users. | Mike Kemp | 1997 | Inactive | — |
| Sketch-Deck Took sketches and converted them into beautifully formatted slides. David Mack (2013) Took sketches and converted them into beautifully formatted slides. | David Mack | 2013 | Inactive | — |
| Skygate Technology Specialized in IT security, providing products, consultancy, and software/application development to organizations. Pete Chown (1996) Specialized in IT security, providing products, consultancy, and software/application development to organizations. | Pete Chown | 1996 | Inactive | — |
| Smart Crib Commercialized a unique password solution aimed initially at end-users in the SME market segment. Dan Cvrcek (2011) Commercialized a unique password solution aimed initially at end-users in the SME market segment. | Dan Cvrcek | 2011 | Inactive | — |
| SmarterQueue A social media management tool that saves hours of manual work by helping find proven content to share, recycle posts, and learn from competitors. Claude Schneider (2016) A social media management tool that saves hours of manual work by helping find proven content to share, recycle posts, and learn from competitors. | Claude Schneider | 2016 | Active | — |
| SmartInfoSearch Developed intelligent information retrieval technology which searched for text based on the meaning of words. Chris Charlton, Calum Grant (2003) Developed intelligent information retrieval technology which searched for text based on the meaning of words. | Chris Charlton, Calum Grant | 2003 | Inactive | — |
| Sociality Commercialized validation techniques for distributed systems using temporal logic. Ian Benson (1999) Commercialized validation techniques for distributed systems using temporal logic. | Ian Benson | 1999 | Inactive | — |
| SoftForum Provides online security solutions globally. Jong-Hyeon Lee (1995) Provides online security solutions globally. | Jong-Hyeon Lee | 1995 | Active | — |
| Software Integrators Designs and develops transaction banking systems. Nick Barratt (1988) Designs and develops transaction banking systems. | Nick Barratt | 1988 | Active | — |
| Software Solutions Developed software and peripherals for the Acorn ARM-based machines. Paul Fellows (1989) Developed software and peripherals for the Acorn ARM-based machines. | Paul Fellows | 1989 | Inactive | — |
| Sonic Pi Offered a free open-source, code-based music creation and performance tool. The tool was used by educators to teach introductory Computer Science and by musicians as a live digital instrument. Sam Aaron (2018) Offered a free open-source, code-based music creation and performance tool. The tool was used by educators to teach introductory Computer Science and by musicians as a live digital instrument. | Sam Aaron | 2018 | Unknown | — |
| Sonic Pi Offered a free open-source, code-based music creation and performance tool. The tool was used by educators to teach introductory Computer Science and by musicians as a live digital instrument. (2018) Offered a free open-source, code-based music creation and performance tool. The tool was used by educators to teach introductory Computer Science and by musicians as a live digital instrument. | — | 2018 | Active | — |
| Spaceward Microsystems Ltd Manufactured computer graphics equipment for the TV industry. Mike Kemp (1983) Manufactured computer graphics equipment for the TV industry. | Mike Kemp | 1983 | Inactive | — |
| Spaceward Studios Operated as a recording studio, initially 16 and later 24 tracks, in Cambridge, UK. Mike Kemp (1972) Operated as a recording studio, initially 16 and later 24 tracks, in Cambridge, UK. | Mike Kemp | 1972 | Inactive | — |
| Spark! Data Built online business platforms. Lee Fedder (1996) Built online business platforms. | Lee Fedder | 1996 | Inactive | — |
| SRI Cambridge Carried out contract research in software technology, natural language processing, and artificial intelligence for government and industry. Ian Benson (1985) Carried out contract research in software technology, natural language processing, and artificial intelligence for government and industry. | Ian Benson | 1985 | Inactive | — |
| STARFISH Provided program management and consulting services. Richard Mason (2005) Provided program management and consulting services. | Richard Mason | 2005 | Inactive | — |
| Starfish Development Ltd Construction business Peter Cowley (2000) Construction business | Peter Cowley | 2000 | Inactive | — |
| StartHQ A web app directory and browser home-page replacement that aids in finding the best applications. The service categorizes apps, making them easier to search for and locate after signing up. Oleg Podsechin (2011) A web app directory and browser home-page replacement that aids in finding the best applications. The service categorizes apps, making them easier to search for and locate after signing up. | Oleg Podsechin | 2011 | Active | — |
| Stealth Alexander Kuhnle | Alexander Kuhnle | — | Active | — |
| StegoStik Produced secure USB storage solutions. Glen Slade (2004) Produced secure USB storage solutions. | Glen Slade | 2004 | Inactive | — |
| Studio Audio and Video Ltd Brought state-of-the-art digital audio editing to the desktop with a digital audio editor/workstation. Mike Kemp (1991) Brought state-of-the-art digital audio editing to the desktop with a digital audio editor/workstation. | Mike Kemp | 1991 | Inactive | — |
| Survey Online Provided independent pre-sales house surveys. Chris Galley (1999) Provided independent pre-sales house surveys. | Chris Galley | 1999 | Acquired | — |
| Sygneca Operated as an IT consultancy. Jon Pretty (2004) Operated as an IT consultancy. | Jon Pretty | 2004 | Inactive | — |
| Synergy Energy Undertook two principal activities: new business incubation and early stage investment. Nat Billington (2011) Undertook two principal activities: new business incubation and early stage investment. | Nat Billington | 2011 | Inactive | — |
| TangibleFX Jonathan May (2011) | Jonathan May | 2011 | Inactive | — |
| Tarragon Embedded Technology Specialized in automotive embedded software. John Botham, Steve Montgomery (1996) Specialized in automotive embedded software. | John Botham, Steve Montgomery | 1996 | Acquired | — |
| TechWolf Uses explainable AI to connect people with jobs and education. Jeroen Van Hautte (2018) Uses explainable AI to connect people with jobs and education. | Jeroen Van Hautte | 2018 | Active | — |
| Telemarq Is a technology and software development consultancy. Emphasizes web services and Internet-of-Things. Quentin Stafford-Fraser (2011) Is a technology and software development consultancy. Emphasizes web services and Internet-of-Things. | Quentin Stafford-Fraser | 2011 | Active | — |
| Tenison Technology EDA Provided software tools used to help develop system-on-chip (SoC) designs. David Greaves (2000) Provided software tools used to help develop system-on-chip (SoC) designs. | David Greaves | 2000 | Acquired | — |
| Tenyks ★ Aims to invent the way humanity interacts with AI to protect the world from the terminator. Helps Machine Learning Engineers ship production-ready models faster than the competition. Botty Dimanov, Dmitry Kazhdan, Maleakhi Wijaya (2019) Aims to invent the way humanity interacts with AI to protect the world from the terminator. Helps Machine Learning Engineers ship production-ready models faster than the competition. | Botty Dimanov, Dmitry Kazhdan, Maleakhi Wijaya | 2019 | Active | — |
| ThatsMyFace ▲ Specializes in patent-pending technologies. Focuses on facial reconstruction, facial analysis, and transforming 2D portraiture into 3D sculptures. Mark Cardle (2008) Specializes in patent-pending technologies. Focuses on facial reconstruction, facial analysis, and transforming 2D portraiture into 3D sculptures. | Mark Cardle | 2008 | Active | — |
| Three-Space Ltd Developed ACIS. Charles Lang (1986) Developed ACIS. | Charles Lang | 1986 | Inactive | — |
| Tideway Systems ▲ Developed IT discovery software. Tim Coote, Duncan Grisby (2002) Developed IT discovery software. | Tim Coote, Duncan Grisby | 2002 | Acquired | — |
| Tokenetic Robert Dirkin (2024) | Robert Dirkin | 2024 | Inactive | — |
| Toughbyte Changes the way companies and developers find each other. Operates a platform and a distributed team of recruiters, combining automation with highly personalized service for both talent and companies. Oleg Podsechin (2015) Changes the way companies and developers find each other. Operates a platform and a distributed team of recruiters, combining automation with highly personalized service for both talent and companies. | Oleg Podsechin | 2015 | Active | — |
| Trampoline Systems ★ Specialized in social analytic software. Craig McMillan (2003) Specialized in social analytic software. | Craig McMillan | 2003 | Inactive | — |
| Transentia Specialized as a technology transfer consultant, assisting public-sector intellectual property owners with early-stage technology commercialization. Toby Austin (2008) Specialized as a technology transfer consultant, assisting public-sector intellectual property owners with early-stage technology commercialization. | Toby Austin | 2008 | Inactive | — |
| Transport Telematics Provided expert advice to transport operators and technology suppliers regarding the development, deployment, and operation of Intelligent Transport Systems. Neil Barton (2008) Provided expert advice to transport operators and technology suppliers regarding the development, deployment, and operation of Intelligent Transport Systems. | Neil Barton | 2008 | Inactive | — |
| Trigger.io Provided the simplest way to build native mobile apps using HTML5. James Brady (2008) Provided the simplest way to build native mobile apps using HTML5. | James Brady | 2008 | Inactive | — |
| Trinamo Helped early-stage technology companies accelerate sales and optimize profits. Stephen Allott (2005) Helped early-stage technology companies accelerate sales and optimize profits. | Stephen Allott | 2005 | Inactive | — |
| Turing Talent Provides graduate and internship programmes for technical talent. Christina Xi Chen (2018) Provides graduate and internship programmes for technical talent. | Christina Xi Chen | 2018 | Active | — |
| Twigkit Provided a suite of search modules that retrieved and visualized data from any combination of search engines, databases, and data providers simultaneously. Bjarki Holm (2009) Provided a suite of search modules that retrieved and visualized data from any combination of search engines, databases, and data providers simultaneously. | Bjarki Holm | 2009 | Acquired | — |
| TxTEz Revolutionized B2C communication in Africa. Andy Hopper, Ripduman Sohan (2013) Revolutionized B2C communication in Africa. | Andy Hopper, Ripduman Sohan | 2013 | Inactive | — |
| Typeset An AI design system that automatically created beautiful slide decks, documents, reports, and social media posts as content was typed. Bjarki Holm (2020) An AI design system that automatically created beautiful slide decks, documents, reports, and social media posts as content was typed. | Bjarki Holm | 2020 | Acquired | — |
| Ubisense ★ Provides market-leading location solutions. Andy Hopper (2002) Provides market-leading location solutions. | Andy Hopper | 2002 | Active | — |
| UK Broadband Ltd Provided wireless data capacity, equipment, services, and solutions to the telecoms industry, service providers, channel partners, and the public sector. Faisal Ahmed (2001) Provided wireless data capacity, equipment, services, and solutions to the telecoms industry, service providers, channel partners, and the public sector. | Faisal Ahmed | 2001 | Acquired | — |
| UK Online Served as the UK's first full ISP. Tim King (1994) Served as the UK's first full ISP. | Tim King | 1994 | Acquired | — |
| Unikernel Systems ★ Provided a new approach to building, deploying, and managing cloud services. Amir Chaudhry, Thomas Gazagnaire, Thomas Leonard, Anil Madhavapeddy, Mindy Preston, David Sheets, Balraj Singh, Magnus Skjegstad, Jeremy Yallop (2015) Provided a new approach to building, deploying, and managing cloud services. | Amir Chaudhry, Thomas Gazagnaire, Thomas Leonard, Anil Madhavapeddy, Mindy Preston, David Sheets, Balraj Singh, Magnus Skjegstad, Jeremy Yallop | 2015 | Acquired | — |
| UsefulBird Developed generative search, a core technology in the generative-AI stack. Indigo Orton (2022) Developed generative search, a core technology in the generative-AI stack. | Indigo Orton | 2022 | Inactive | — |
| VeriQual Specialized in developing applications for iPhone and iPad, Android, and web platforms using Ruby on Rails. Also built e-commerce applications and content management systems using PHP frameworks like Magento and Drupal. Samir-Ali Feroze (2004) Specialized in developing applications for iPhone and iPad, Android, and web platforms using Ruby on Rails. Also built e-commerce applications and content management systems using PHP frameworks like Magento and Drupal. | Samir-Ali Feroze | 2004 | Inactive | — |
| Vipadia Operated as a VoIP R&D consultancy. Neil Stratford (2005) Operated as a VoIP R&D consultancy. | Neil Stratford | 2005 | Acquired | — |
| Virata Ltd Manufactured software and components for DSL and other broadband technologies. David Greaves, Andy Hopper (1993) Manufactured software and components for DSL and other broadband technologies. | David Greaves, Andy Hopper | 1993 | Acquired | — |
| Viriturr Developed a platform to generate optimized and holistic retrofit designs for the decarbonization of existing, non-domestic buildings using a multi-physics machine learning framework. Robert Edwin Rouse (2023) Developed a platform to generate optimized and holistic retrofit designs for the decarbonization of existing, non-domestic buildings using a multi-physics machine learning framework. | Robert Edwin Rouse | 2023 | Unknown | — |
| Viriturr Developed a platform to generate optimized and holistic retrofit designs for the decarbonization of existing, non-domestic buildings using a multi-physics machine learning framework. (2023) Developed a platform to generate optimized and holistic retrofit designs for the decarbonization of existing, non-domestic buildings using a multi-physics machine learning framework. | — | 2023 | Inactive | — |
| Volemic Develops software products that enhance email trustworthiness. Combines machine learning, natural language processing, and graph database technologies to protect email communications from errors and malicious intent. Primoz Fabiani (2021) Develops software products that enhance email trustworthiness. Combines machine learning, natural language processing, and graph database technologies to protect email communications from errors and malicious intent. | Primoz Fabiani | 2021 | Active | — |
| Vox Live Robert Dirkin (2023) | Robert Dirkin | 2023 | Active | — |
| Wizix Produced mobile live video applications. Philip Rushby (2014) Produced mobile live video applications. | Philip Rushby | 2014 | Inactive | — |
| Xandera Provided IT consulting services focused on the health insurance sector. Richard Mason (2000) Provided IT consulting services focused on the health insurance sector. | Richard Mason | 2000 | Acquired | — |
| Xi Software Ltd Specializes in open source UNIX and Linux, providing consultancy, installation, and support services. Assists medium and enterprise companies in increasing overall IT network performance, reducing costs, and improving network productivity. John Collins (1986) Specializes in open source UNIX and Linux, providing consultancy, installation, and support services. Assists medium and enterprise companies in increasing overall IT network performance, reducing costs, and improving network productivity. | John Collins | 1986 | Active | — |
| Xitu Inc Offers a community platform designed to help Chinese technologists share knowledge, learn new skills, and advance professionally. Ming Yin (2015) Offers a community platform designed to help Chinese technologists share knowledge, learn new skills, and advance professionally. | Ming Yin | 2015 | Active | — |
| Xynchron Ltd Developed software for managing data through the process engineering project lifecycle. Rurik Turton (2002) Developed software for managing data through the process engineering project lifecycle. | Rurik Turton | 2002 | Inactive | — |
| YossarianLives! Developed a "metaphorical search engine". Ekaterina Shutova (2011) Developed a "metaphorical search engine". | Ekaterina Shutova | 2011 | Inactive | — |
| Yudkin Consulting AG Provided software for accounting and finance. Mark Yudkin (1989) Provided software for accounting and finance. | Mark Yudkin | 1989 | Inactive | — |
| Zoonami Produced and developed entertainment software for video game consoles. Martin Hollis (2000) Produced and developed entertainment software for video game consoles. | Martin Hollis | 2000 | Inactive | — |
