Top list · United Kingdom
Security startups in the United Kingdom
164 security startups in the United Kingdom have raised money in rounds we track. These are the 50 that have raised the most, $3.9B between them, with London the most common home.
- 1TEKEVERFounded 2013United Kingdom$654Mlast round Sept 2026
- 2
QuantexaQuantexa is a UK-based software company founded in 2016, specializing in Contextual Decision Intelligence (CDI).Quantexa is a UK-based software company founded in 2016, specializing in Contextual Decision Intelligence (CDI).
Founded 2016London, United Kingdom$471Mlast round Mar 2026 - 3
DarktraceDarktrace is an AI company that uses cybersecurity solutions to identify, prevent, and eliminate insider threats.Darktrace is an AI company that uses cybersecurity solutions to identify, prevent, and eliminate insider threats.
Founded 2013Cambridge, United Kingdom$425Mlast round May 2021 - 4
BlackwallBlackwall is an AI-enabled security infrastructure company based in Tallinn, Estonia.Blackwall is an AI-enabled security infrastructure company based in Tallinn, Estonia.
Founded 2019Tallinn, United Kingdom$162Mlast round Oct 2026 - 5
TessianTessian creates a Human Layer Security that helps people work without security disruptions getting in the way.Tessian creates a Human Layer Security that helps people work without security disruptions getting in the way.
Founded 2013Boston, United Kingdom$127Mlast round Dec 2023 - 6
FeaturespaceFeaturespace provides an adaptive behavioral analytics technology and automated deep behavioral networks for risk management.Featurespace provides an adaptive behavioral analytics technology and automated deep behavioral networks for risk management.
Founded 2008Cambridge, United Kingdom$125Mlast round Dec 2024 - 7SnykFounded 2015United Kingdom$117Mlast round Jan 2023
- 8
Inforcerinforcer is a London-based cybersecurity and software company founded in 2022.inforcer is a London-based cybersecurity and software company founded in 2022.
Founded 2022Richmond, United Kingdom$113Mlast round Jul 2026 - 9
CallsignCallsign is a global technology company based in London, UK, that focuses on digital identity, fraud prevention, and behavioral authentication.Callsign is a global technology company based in London, UK, that focuses on digital identity, fraud prevention, and behavioral authentication.
Founded 2011London, United Kingdom$109Mlast round Jun 2023 - 10
Immersive LabsImmersive Labs develops a platform that measures and improves cybersecurity skills across businesses.Immersive Labs develops a platform that measures and improves cybersecurity skills across businesses.
Founded 2017Bristol, United Kingdom$104Mlast round Jun 2025 - 11
MypinpadMypinpad is a global leader in mobile card payments acceptance and identity authentication software solutions.Mypinpad is a global leader in mobile card payments acceptance and identity authentication software solutions.
Founded 2012Cardiff, United Kingdom$94Mlast round Jun 2026 - 12
MimecastMimecast is a SaaS-based email management platform enabling companies to administer business communications and data.Mimecast is a SaaS-based email management platform enabling companies to administer business communications and data.
Founded 2003London, United Kingdom$90Mlast round Sept 2012 - 13OnfidoOnfido is a provider of automated digital identity verification.
Onfido is a provider of automated digital identity verification.
Founded 2012London, United Kingdom$85Mlast round Apr 2019 - 14
iProoviProov is a London-based technology company founded in 2011, specializing in biometric face verification.iProov is a London-based technology company founded in 2011, specializing in biometric face verification.
Founded 2011London, United Kingdom$77Mlast round Nov 2023 - 15FeedzaiFounded -United Kingdom$76Mlast round Oct 2017
- 16
ImmersiveWe grow your talent acquisition team with professional On-Demand in-house recruiters.We grow your talent acquisition team with professional On-Demand in-house recruiters.
Founded 2020United Kingdom$66Mlast round Oct 2022 - 17PrivitarPrivitar is a data privacy platform that protects its customer's sensitive personal data and delivers comprehensive data privacy.
Privitar is a data privacy platform that protects its customer's sensitive personal data and delivers comprehensive data privacy.
Founded 2014United Kingdom$64Mlast round Jun 2020 - 18
PQShieldPQShield is a post-quantum cryptography company founded in 2018 as a spin-out from the University of Oxford’s Mathematical Institute.PQShield is a post-quantum cryptography company founded in 2018 as a spin-out from the University of Oxford’s Mathematical Institute.
Founded 2018Oxford, United Kingdom$57Mlast round Mar 2026 - 19
Hack The BoxHack The Box (HTB) is a leading platform for cybersecurity education, certification, and talent assessment, founded in 2017.Hack The Box (HTB) is a leading platform for cybersecurity education, certification, and talent assessment, founded in 2017.
Founded 2017Folkestone, United Kingdom$56Mlast round Jan 2023 - 20
PanaseerPanaseer is an enterprise cybersecurity company founded in 2014, headquartered in Godalming, United Kingdom, with an office in New York, USA.Panaseer is an enterprise cybersecurity company founded in 2014, headquartered in Godalming, United Kingdom, with an office in New York, USA.
Founded 2014Godalming, United Kingdom$48Mlast round Mar 2026 - 21
YotiYoti is a digital identity platform that provides secure identity verification, online and in person.Yoti is a digital identity platform that provides secure identity verification, online and in person.
Founded 2014London, United Kingdom$47Mlast round Dec 2023 - 22
Digital ShadowsDigital Shadows identifies unwanted exposure, protect against external threats, and minimize digital risk.Digital Shadows identifies unwanted exposure, protect against external threats, and minimize digital risk.
Founded 2011London, United Kingdom$44Mlast round Jul 2019 - 23
Risk LedgerRisk Ledger is a London-based cybersecurity company founded in 2018, specializing in third-party risk management (TPRM).Risk Ledger is a London-based cybersecurity company founded in 2018, specializing in third-party risk management (TPRM).
Founded 2018London, United Kingdom$43Mlast round Jul 2026 - 24
Lazarus AILazarus builds AI systems that help people solve the world’s toughest problems.Lazarus builds AI systems that help people solve the world’s toughest problems.
Founded 2017Boston, United Kingdom$43Mlast round Nov 2026 - 25
Geordie AIGeordie AI is a London-based cybersecurity startup founded in 2025.Geordie AI is a London-based cybersecurity startup founded in 2025.
Founded 2025London, United Kingdom$42Mlast round May 2026 - 26
NetsparkerNetsparker is an easy to use and highly accurate web application security solution for all types of web applications.Netsparker is an easy to use and highly accurate web application security solution for all types of web applications.
Founded 2009United Kingdom$40Mlast round Mar 2018 - 27
CoincoverCoinCover is a UK-based digital asset security and risk management company founded in May 2018 in Cardiff, Wales.CoinCover is a UK-based digital asset security and risk management company founded in May 2018 in Cardiff, Wales.
Founded 2018London, United Kingdom$39Mlast round Feb 2026 - 28
TurinTechTurin Tech is an engineering service company that specializes in designing and developing industrial automation solutions.Turin Tech is an engineering service company that specializes in designing and developing industrial automation solutions.
Founded 2000Moncalieri, United Kingdom$35Mlast round Mar 2025 - 29PreservicaFounded 2012United Kingdom$32Mlast round Nov 2023
- 30GarrisonFounded -United Kingdom$30Mlast round Oct 2018
- 31
MimiroMimiro is in developing digital solutions for the food growth and production process.Mimiro is in developing digital solutions for the food growth and production process.
Founded 2018United Kingdom$30Mlast round Jan 2019 - 32
SenseOnSenseOn is an AI-driven cybersecurity company based in London, United Kingdom, founded in 2017.SenseOn is an AI-driven cybersecurity company based in London, United Kingdom, founded in 2017.
Founded 2017London, United Kingdom$26Mlast round Sept 2021 - 33
CyberSmartCyberSmart is a UK-based cybersecurity and compliance technology company founded in 2016 and headquartered in London.CyberSmart is a UK-based cybersecurity and compliance technology company founded in 2016 and headquartered in London.
Founded 2016London, United Kingdom$26Mlast round Feb 2023 - 34
BitfountBitfount is a London-based technology company founded in 2020 that offers a federated AI and data science platform.Bitfount is a London-based technology company founded in 2020 that offers a federated AI and data science platform.
Founded 2020London, United Kingdom$26Mlast round Jul 2025 - 35
TracebitTracebit provides a cloud threat detection and deception platform that employs decoy systems to attract and capture attackers.Tracebit provides a cloud threat detection and deception platform that employs decoy systems to attract and capture attackers.
Founded 2022Manhattan, United Kingdom$26Mlast round Mar 2026 - 36
ThreatAwareThreatAware is a London-based cybersecurity startup that specializes in Cyber Asset Attack Surface Management (CAASM) and Cyber Hygiene.ThreatAware is a London-based cybersecurity startup that specializes in Cyber Asset Attack Surface Management (CAASM) and Cyber Hygiene.
Founded 2019London, United Kingdom$25Mlast round Feb 2026 - 37
SafeToNetSafeToNet makes the digital world safer for children to explore and enjoy.SafeToNet makes the digital world safer for children to explore and enjoy.
Founded 2013Reading, United Kingdom$23Mlast round Sept 2026 - 38
RavelinRavelin is a smart fraud detection and prevention platform that helps companies stop online payment fraud.Ravelin is a smart fraud detection and prevention platform that helps companies stop online payment fraud.
Founded 2014London, United Kingdom$23Mlast round Jul 2020 - 39
Prevalent AIPrevalent AI is a London-based cybersecurity company founded in 2017 by former GCHQ and UK government officials, including CEO Paul Stokes and COO Arun Raj.Prevalent AI is a London-based cybersecurity company founded in 2017 by former GCHQ and UK government officials, including CEO Paul Stokes and COO Arun Raj.
Founded 2017London, United Kingdom$22Mlast round Aug 2026 - 40
Cado SecurityCado Security provides the cloud investigation platform that empowers security teams to respond to threats at cloud speed.Cado Security provides the cloud investigation platform that empowers security teams to respond to threats at cloud speed.
Founded 2020London, United Kingdom$21Mlast round Jun 2025 - 41INCOPROIncopro is an online brand and intellectual property protection company.
Incopro is an online brand and intellectual property protection company.
Founded 2011United Kingdom$21Mlast round May 2018 - 42
watchTowrwatchTowr is a global cybersecurity technology company founded in 2021 and headquartered in Singapore, with additional offices in New York and London.watchTowr is a global cybersecurity technology company founded in 2021 and headquartered in Singapore, with additional offices in New York and London.
Founded 2021Singapore, United Kingdom$19Mlast round Oct 2024 - 43
SitehopSitehop develops cutting-edge networking and cyber-security solutions.Sitehop develops cutting-edge networking and cyber-security solutions.
Founded 2021Sheffield, United Kingdom$18Mlast round Oct 2025 - 44
CyberOwlCyberOwl offers an early warning system for cyber attacks through real-time monitoring of high value targets for malicious behavior.CyberOwl offers an early warning system for cyber attacks through real-time monitoring of high value targets for malicious behavior.
Founded 2016London, United Kingdom$17Mlast round Dec 2024 - 45YopeFounded -United Kingdom$17Mlast round Jul 2026
- 46
OuterlimitOuterlimit provides AI security and governance for agentic AI systems, with controls for identity, access, risk assessment, and activity.Outerlimit provides AI security and governance for agentic AI systems, with controls for identity, access, risk assessment, and activity.
Founded -London, United Kingdom$16Mlast round Sept 2026 - 47
AugurAugur is the next-generation perception engine that turns legacy sensor infrastructure into real‐time operational intelligence.Augur is the next-generation perception engine that turns legacy sensor infrastructure into real‐time operational intelligence.
Founded 2023London, United Kingdom$15Mlast round Mar 2026 - 48
RevEng.AIRevEng.AI is a London-based cybersecurity and AI company that specializes in building an AI-powered binary intelligence platform for reverse engineering and malRevEng.AI is a London-based cybersecurity and AI company that specializes in building an AI-powered binary intelligence platform for reverse engineering and mal
Founded 2022London, United Kingdom$15Mlast round May 2026 - 49Bron LabsFounded 2024United Kingdom$15Mlast round Oct 2025
- 50Garrison TechnologyGarrison designs and develops cyber-security based technology for enterprises.
Garrison designs and develops cyber-security based technology for enterprises.
Founded 2014United Kingdom$15Mlast round Aug 2024
United KingdomCompanies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.
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