Top 100 Cybersecurity Companies in London
The Best of December 2025Looking for a top cybersecurity consultant in London?
Check out our list of the best cybersecurity consulting companies to choose a partner that can secure your company. Preventing data breaches should be the top security priority for all businesses in the digital age.
To assist you in your search for a partner, we’ve compiled this list of the top cybersecurity consulting companies in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Cybersecurity Consultants
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361Undisclosed10 - 49 employeesOxford, EnglandFounded in 1996, Wiseserve Ltd. Is a Cybersecurity company. Their team provides Cybersecurity and IT managed services.Read More
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362Undisclosed250 - 999 employeesShoreham-by-Sea, EnglandFocus Group , a cloud consulting & SI company, provide cloud consulting & SI and unified communications consulting & SI. They were founded in 2003.Read More
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363UndisclosedFreelancer employeesBrighton and Hove, EnglandSmall Cybersecurity company PC HELP MAN, is based in Brighton and Hove, England. The team focuses on Cybersecurity and other IT consulting and SI.Read More
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364Undisclosed10 - 49 employeesLinton, EnglandCybersecurity company Mannassi IT Solutions was launched in 1996. The firm provides Cybersecurity and IT managed services, and is small.Read More
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365Undisclosed10 - 49 employeesWorthing, EnglandCounterpoint is an IT managed services company headquartered in Worthing, England. Their services include IT managed services and IT strategy consulting.Read More
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366$5,000+10 - 49 employeesKempston, EnglandTotal IT Technology Solutions Ltd is an IT managed services company founded in 2006. The small team focuses on IT managed services and unified communications consulting & SI.Read More
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367$5,000+Freelancer employeesBrighton, EnglandJim Callender Web Developer is a Brighton, England-based web design agency. Launched in 2005, the team offers Web Design and Web Development.Read More
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368$1,000+Freelancer employeesBiddenham, EnglandPeter Groom is an IT strategy consulting company. Their team is located in Biddenham, England. The company provides IT strategy consulting and Business Consulting.Read More
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369$1,000+10 - 49 employeesLondon, EnglandRead More
SonicFast is a hosting solutions provider founded in 2015 in London and with about 5 employees on board. Their main services include cybersecurity, cloud consulting and systems integration, IT managed services, and business intelligence. They mostly cater to small businesses in telecommunications, IT, and gaming industries.
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370$5,000+2 - 9 employeesChalfont Saint Peter, EnglandBAT CODERS is a Cybersecurity company. Launched in 2011, the team offers Cybersecurity and Mobile App Development. The agency is based in Chalfont Saint Peter, England.Read More
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371$1,000+10 - 49 employeesCambridge, EnglandHfS Research is a Back Office Outsourcing company. They are based in Cambridge, England and Cambridge, Massachusetts, and their services include Back Office Outsourcing and Artificial Intelligence.Read More
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372Undisclosed250 - 999 employeesCroxley Green, EnglandLaunched in 2001, GCI is a data analytics company. The team offers BI & big data consulting & SI and cloud consulting & SI and is in Lincoln, England and Calder Grove, England.Read More
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373Undisclosed50 - 249 employeesLondon, EnglandHeleCloud is a cloud consulting & SI company founded in 2016. The team provides cloud consulting & SI and IT managed services.Read More
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374Undisclosed50 - 249 employeesBishop’s Stortford, EnglandSeceon Inc. Is a midsize artificial intelligence firm and Cybersecurity company. Launched in 2014, the team focuses on Artificial Intelligence and Cybersecurity.Read More
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375Undisclosed250 - 999 employeesLondon, EnglandKocho is a Cybersecurity and IT managed services company founded in 2001. The midsize team offers Cybersecurity and IT managed services.Read More
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376Undisclosed10 - 49 employeesLondon, EnglandJUMPSEC Ltd is a Cybersecurity company founded in 2012. Their team specializes in Cybersecurity.Read More
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377Undisclosed2 - 9 employeesLondon, EnglandIn London, England, The Hack Angels Recoveries Company is a small Cybersecurity company. The team focuses on Cybersecurity and IT managed services.Read More
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378Undisclosed10 - 49 employeesCity of London, EnglandLaunched in 2010, Threatscape is a Cybersecurity and IT managed services company. The team focuses on Cybersecurity and IT managed services.Read More
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379Undisclosed250 - 999 employeesLondon, EnglandExiger is an AI company. They offer Artificial Intelligence and Cybersecurity and were launched in 2013.Read More
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380Undisclosed50 - 249 employeesUxbridge, EnglandCybersecurity company MyData-TRUST is headquartered in Mons, Belgium and Paris, France. The team focuses on Cybersecurity and Compliance Consulting.Read More
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381Undisclosed50 - 249 employeesLondon, EnglandTelappliant is a cloud consulting & SI company. Headquartered in London, England, their team provides cloud consulting & SI and Cybersecurity.Read More
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382Undisclosed2 - 9 employeesCity of London, EnglandCYBRID is an IT strategy consulting company. The team focuses on IT strategy consulting and cloud consulting & SI, and the agency is based in Havant, England and City of London, England.Read More
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383$5,000+10 - 49 employeesAldermaston, EnglandIn Aldermaston, England, Voyager Networks is an IT managed services company. Their services include IT managed services and Enterprise App Modernization.Read More
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384Undisclosed10 - 49 employeesStevenage, EnglandGreenlight Computers is a cloud consulting & SI company. They were launched in 2006, and their services include cloud consulting & SI and Digital Strategy.Read More
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385Undisclosed50 - 249 employeesLondon, EnglandTalan UK is a data analytics company launched in 2024. The midsize team focuses on BI & big data consulting & SI and Marketing Strategy.Read More
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386$10,000+10 - 49 employeesLondon, EnglandSnap International is a Transcription company. They are based in London, England and have small team. Their services include Transcription and Call Center Services.Read More
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387Undisclosed10 - 49 employeesLondon, EnglandNauta Capital UK Ltd is a Funding & Investment company headquartered in London, England and Barcelona, Spain. Founded in 2004, the team offers Funding & Investment and DevOps Managed Services.Read More
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