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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151Undisclosed10 - 49 employeesLondon, EnglandAstec Computing (UK) Ltd, an IT managed services company, was established in 1992. The team focuses on IT managed services and cloud consulting & SI.Read More
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152$1,000+2 - 9 employeesLondon, EnglandNovix IT is an IT strategy consulting company. Located in Edinburgh, Scotland and London, England, their team specializes in IT strategy consulting and BI & big data consulting & SI.Read More
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153Undisclosed2 - 9 employeesLondon, EnglandSeltech IT Services Ltd is a cloud consulting & SI company. They were founded in 2011 and focus on cloud consulting & SI and Cybersecurity.Read More
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154$5,000+10 - 49 employeesLondon, EnglandLumina Technologies Ltd is an IT managed services company. The Hemel Hempstead, England-based team specializes in IT managed services and cloud consulting & SI.Read More
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155$1,000+10 - 49 employeesLondon, EnglandEstablished in 2018, Ictnet Limited is a small IT strategy consulting company. Their team offers IT strategy consulting and BI & big data consulting & SI.Read More
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156$1,000+10 - 49 employeesLondon, EnglandProStep Technologies is a cloud consulting & SI company. Launched in 2021, the team focuses on cloud consulting & SI and Cybersecurity. The agency is headquartered in London, England.Read More
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157Undisclosed10 - 49 employeesLondon, EnglandInteguards LTD is a Market Research company. The London, England-based firm was established in 2025. Their services include Market Research and IT strategy consulting.Read More
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158Undisclosed10 - 49 employeesDartford, EnglandCortec IT, a social media marketing firm, is in Dartford, England. They focus on Social Media Marketing and Search Engine Optimization.Read More
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159$1,000+10 - 49 employeesLondon, EnglandCritical Cloud is a cloud consulting & SI company. Established in 2024, their team focuses on cloud consulting & SI and Cybersecurity.Read More
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160$1,000+10 - 49 employeesLondon, EnglandSEO services firm Cyberonics Limited is located in London, England. Established in 2025, the team specializes in Search Engine Optimization and cloud consulting & SI.Read More
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161$1,000+10 - 49 employeesLondon, EnglandFounded in 2024, BYTEOPS LTD is an IT strategy consulting company. Their services include IT strategy consulting and Cybersecurity.Read More
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162Undisclosed2 - 9 employeesLondon, EnglandFounded in 2011, 2|SEC Consulting is a Cybersecurity company. The small team focuses on Cybersecurity and Application Testing.Read More
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163$25,000+10 - 49 employeesLondon, EnglandElecti Consulting is an AI development company. Established in 2017, the team provides Artificial Intelligence and Blockchain. The agency is based in London, England and Λεμεσός, Cyprus.Read More
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164$5,000+10 - 49 employeesLondon, EnglandIT managed services company H2o Networks specializes in IT managed services and cloud consulting & SI. They were founded in 2004.Read More
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165Undisclosed10 - 49 employeesLondon, EnglandAcumin Consulting is a small Cybersecurity and Business Consulting company based in London, England. Their services include Cybersecurity and Business Consulting.Read More
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166Undisclosed10 - 49 employeesCity of London, EnglandCybersecurity and IT managed services company Connect Digital Security was launched in 2016. The team specializes in Cybersecurity and IT managed services.Read More
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167Undisclosed10 - 49 employeesLondon, EnglandC2 Risk is a London, England-based big data company and Cybersecurity company. They focus on BI & big data consulting & SI and Cybersecurity.Read More
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168Undisclosed10 - 49 employeesLondon, EnglandS3M Security is a London, England-based Cybersecurity and software development firm. They provide Cybersecurity and Custom Software Development and were founded in 2016.Read More
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169Undisclosed10 - 49 employeesLondon, EnglandFacia is a Cybersecurity and Compliance Consulting company. Established in 2022, the team specializes in Cybersecurity and Compliance Consulting.Read More
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170Undisclosed10 - 49 employeesGreat Bookham, EnglandCyber Guarded Ltd is a cloud consulting & SI and Cybersecurity company. Founded in 2006, the team offers cloud consulting & SI and Cybersecurity.Read More
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171Undisclosed10 - 49 employeesLondon, EnglandCaptavio Technologies Limited is a London, England-based Cybersecurity company. They focus on Cybersecurity and Custom Software Development and were established in 2021.Read More
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172$1,000+2 - 9 employeesWalton-on-Thames, EnglandFilioTech Limited is an IT managed services company. They were launched in 2016, and their services include IT managed services and Cybersecurity.Read More
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173$5,000+2 - 9 employeesLondon, EnglandMedian IT Limited is an IT managed services company. The small London, England-based team offers IT managed services and IT strategy consulting. The agency was launched in 2018.Read More
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174$1,000+2 - 9 employeesLondon, EnglandThe Cloud Consultancy is an IT managed services company. The small Copthorne, England-based team provides IT managed services and Cybersecurity. The agency was launched in 2015.Read More
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175$1,000+2 - 9 employeesSunbury-on-Thames, EnglandDigital Strategy company Tritactltd was founded in 2024. The firm offers Digital Strategy and IT strategy consulting, and is small.Read More
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176$10,000+2 - 9 employeesLondon, EnglandIn London, England, Altidia Consulting is a small IT strategy consulting company. Their services include IT strategy consulting and cloud consulting & SI.Read More
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177$1,000+2 - 9 employeesNew Malden, EnglandVMR Check is a small IT strategy consulting company in New Malden, England and Southall, England. The team specializes in IT strategy consulting and cloud consulting & SI.Read More
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178Undisclosed2 - 9 employeesLondon, EnglandEstablished in 2023, Dream Delegate is a SEO agency. The team offers Search Engine Optimization and Cybersecurity.Read More
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179$50,000+50 - 249 employeesLondon, EnglandVast Dreams, a custom software development company, was established in 2020. They provides Custom Software Development and Enterprise App Modernization.Read More
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180Undisclosed50 - 249 employeesCity of London, EnglandCybersecurity company Obrela was founded in 2010. Located in City of London, England, the team specializes in Cybersecurity and BI & big data consulting & SI.Read More
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