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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