Top 100 Cybersecurity Companies in London
The Best of October 2026Looking 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.
Jump to Most Reviewed Companies
List of the Best London Cybersecurity Consultants
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151Undisclosed10 - 49 employeesLondon, EnglandKaizen IT Solutions Ltd is an IT strategy consulting company. The team is located in Sheffield, England and London, England, and their services include IT strategy consulting and IT managed services.Read More
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152$1,000+10 - 49 employeesLondon, EnglandLaunched in 2000, 1st-it Limited is an IT strategy consulting company. The team focuses on IT strategy consulting and cloud consulting & SI and is headquartered in London, England.Read More
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153$5,000+50 - 249 employeesLondon, EnglandCloudiQS, a cloud consulting & SI company, is headquartered in London, England. Their services include cloud consulting & SI and CRM consulting and SI.Read More
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154$1,000+10 - 49 employeesLondon, EnglandINTELLIWORX Managed IT is a small IT strategy consulting company established in 2011. Their services include IT strategy consulting and IT managed services.Read More
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155Undisclosed10 - 49 employeesLondon, EnglandIpspecialist is an IT strategy consulting company. Their team is located in London, England. The company specializes in IT strategy consulting and cloud consulting & SI.Read More
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156Undisclosed2 - 9 employeesLondon, EnglandSprint Integration is an IT strategy consulting company. Launched in 2000, the firm is in London, England. Their team focuses on IT strategy consulting and cloud consulting & SI.Read More
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157$1,000+2 - 9 employeesLondon, EnglandMetical Technologies, a Cybersecurity company, is in London, England. Founded in 2021, the team focuses on Cybersecurity and IT strategy consulting.Read More
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158$1,000+10 - 49 employeesPurfleet, EnglandIT managed services company Euro Systems offers IT managed services and cloud consulting & SI. They were founded in 2009.Read More
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159$50,000+10 - 49 employeesBrentford, EnglandFindErnest is a web design company. The firm is based in Hyderabad, India and Brentford, England. Their services include Web Design and UX/UI Design.Read More
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160Undisclosed250 - 999 employeesLondon, EnglandZenzero is an IT managed services company. The midsize London, England-based team offers IT managed services and Cybersecurity. The company was established in 2004.Read More
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161Undisclosed10 - 49 employeesLondon, EnglandSolid Systems is an IT managed services company. Located in Cape Town, South Africa and Johannesburg, South Africa, their team focuses on IT managed services and cloud consulting & SI.Read More
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162Undisclosed10 - 49 employeesLondon, EnglandFounded in 2018, Astec IT Consultancy Ltd is a Business Continuity Management company. The team focuses on Business Continuity Management and cloud consulting & SI and is based in London, England.Read More
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163$10,000+10 - 49 employeesLondon, EnglandRead More
Awesome Resources Ltd is a PR firm founded in 2010 with more than 10 employees. They offer digital strategy, social media marketing, and PR solutions from their office in London. They work with clients ranging from small startups to large companies.
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164$25,000+10 - 49 employeesLondon, EnglandSmall Architectural Design company Lyon Tech, is headquartered in London, England. Their services include Architectural Design and cloud consulting & SI.Read More
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165Undisclosed50 - 249 employeesLondon, EnglandHighgate IT Solutions Ltd is an IT managed services company. In London, England, the team provides IT managed services and Cybersecurity.Read More
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166$5,000+50 - 249 employeesLondon, EnglandRead More
RiskIQ is a cybersecurity company based in San Francisco with a team of just over 150 employees. Established in 2009, they provide cybersecurity, business intelligence, big data consulting, and software integration services to clients in a variety of industries.
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167$5,000+250 - 999 employeesLondon, EnglandBased in San Francisco, California and Reston, Virginia, Lookout is a Cybersecurity company. They specialize in Cybersecurity.Read More
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168$5,000+50 - 249 employeesLondon, EnglandIOActive is a Cybersecurity company. Located in Seattle, Washington and London, England, the agency was launched in 1998. Their team focuses on Cybersecurity.Read More
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169$10,000+250 - 999 employeesSlough, EnglandGuidance Software is a Cybersecurity company. Their midsize team is based in Pasadena, California and New York, New York. Their services include Cybersecurity and IT strategy consulting.Read More
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170$10,000+250 - 999 employeesLondon, EnglandCybereason is a Cybersecurity company. They are in Boston, Massachusetts and London, England, and their services include Cybersecurity and BI & big data consulting & SI.Read More
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171$10,000+250 - 999 employeesLondon, EnglandDigital Guardian, a midsize IT managed services company, is in Waltham, Massachusetts and Reston, Virginia. The team specializes in IT managed services and Cybersecurity.Read More
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172$10,000+250 - 999 employeesLondon, EnglandVeracode is a Cybersecurity company located in Burlington, Massachusetts and London, England. They focus on Cybersecurity and Application Testing and were established in 2006.Read More
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173$1,000+1,000 - 9,999 employeesLondon, EnglandEmagine Consulting is a big data analytics company headquartered in London, England and Nanterre, France. They focus on BI & big data consulting & SI and Cybersecurity and were launched in 1994.Read More
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174Undisclosed50 - 249 employeesLondon, EnglandRavelin Technology is an AI company and Cybersecurity company. They were launched in 2014, and their services include Artificial Intelligence and Cybersecurity.Read More
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175Undisclosed10 - 49 employeesCity of London, EnglandISTARI, a Cybersecurity company, was established in 2020. The team provides Cybersecurity and IT managed services.Read More
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176Undisclosed2 - 9 employeesCity of London, EnglandCybersecurity company Identiom Limited is headquartered in City of London, England. Their services include Cybersecurity and IT managed services.Read More
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177Undisclosed50 - 249 employeesCity of London, EnglandCrossword Cybersecurity Plc is a Cybersecurity company. The City of London, England-based agency was founded in 2014. Their team offers Cybersecurity and IT managed services.Read More
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178Undisclosed1,000 - 9,999 employeesLondon, EnglandEstablished in 1999, Secureworks is a large Atlanta, Georgia-based Cybersecurity company. Their services include Cybersecurity.Read More
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179Undisclosed50 - 249 employeesLondon, EnglandLaunched in 2011, ThreatSpike Labs is a midsize Cybersecurity company based in London, England. Their team specializes in Cybersecurity.Read More
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180Undisclosed10 - 49 employeesLondon, EnglandHeadquartered in London, England, Darklabs is a small Cybersecurity company. Their services include Cybersecurity.Read More
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