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.
List of the Best London Cybersecurity Consultants
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31$1,000+10 - 49 employeesLondon, EnglandTWC IT Solutions is an IT managed services company in London, England; Jersey City, New Jersey and Central, Hong Kong. The small team offers IT managed services, IT strategy consulting, cloud consulting & SI, unified communications consulting & SI, and more and was launched in 2011.Read More
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32$5,000+10 - 49 employeesLondon, EnglandFounded in 2018, MLabs Ltd is a Blockchain company. They are based in London, England and have a small team. The company provides Blockchain, Cybersecurity, Custom Software Development, and IT managed services.Read More
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33$5,000+10 - 49 employeesLeatherhead, EnglandComputer Care, a IT strategy consulting company, is located in Leatherhead, United Kingdom. The small team focuses on IT strategy consulting, cloud consulting & SI, cybersecurity, and IT managed services and was established in 2001.Read More
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34$1,000+10 - 49 employeesLondon, EnglandRead More
Helpdesk Heroes is an IT managed services company. The small London, United Kingdom-based agency was launched in 2016. Their team focuses on IT managed services, cybersecurity, other IT consulting and SI, and IT staff augmentation.
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35$5,000+50 - 249 employeesLondon, EnglandDoherty Associates is an IT managed services company launched in 1991. The midsize London, England-based team offers IT managed services, Cybersecurity, AI Agents, AI Consulting, and more.Read More
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36$25,000+50 - 249 employeesLondon, EnglandCloudcomputing is a Cybersecurity company. The midsize Lisboa, Portugal-based team offers Cybersecurity. The company was launched in 2010.Read More
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37$25,000+1,000 - 9,999 employeesLondon, EnglandNetsol Technologies Inc. Is a Cybersecurity company. Based in Los Angeles, California and London, England, the team specializes in Cybersecurity and cloud consulting & SI.Read More
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38$10,000+10 - 49 employeesStaines-upon-Thames, EnglandIntelance - Technology, AI and cyber advisory and assurance is a Cybersecurity company. Their small team is located in Staines-upon-Thames, England and focuses on Cybersecurity, IT strategy consulting, AI Consulting, Custom Software Development, and more. The agency was established in 2017.Read More
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39$5,000+2 - 9 employeesStaines-upon-Thames, EnglandCompliance Consulting company KEW DATA was launched in 2023. They are headquartered in Staines-upon-Thames, England and have a small team. Their services include Compliance Consulting, Internet & Technology Law, and Cybersecurity.Read More
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40$1,000+2 - 9 employeesWembley, EnglandVUPAX Solutions Limited, an user experience design company, was founded in 2025. Their small team is based in Wembley, England. Their services include UX/UI Design, cloud consulting & SI, Cybersecurity, Custom Software Development, and more.Read More
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41$5,000+50 - 249 employeesLondon, EnglandRead More
Suntel Analytics, LLC is a West Palm Beach, Florida-based AI development company. Launched in 2022, the small team focuses on Artificial Intelligence, business consulting, corporate training, ai consulting, and more.
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42Undisclosed1,000 - 9,999 employeesLondon, EnglandRead More
BSI Group is an IT firm headquartered in London. Their midsized team specializes in cybersecurity, IT strategy consulting, and business consulting.
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43$5,000+50 - 249 employeesLondon, EnglandCovertSwarm is a Cybersecurity company based in London, England and Wilmington, Delaware. Founded in 2020, the team provides Cybersecurity.Read More
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44$10,000+50 - 249 employeesLondon, EnglandAI Consulting company T3 was launched in 2023. The agency offers AI Consulting, Artificial Intelligence, Generative AI, AI Agents, and more and has a midsize team.Read More
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45Undisclosed250 - 999 employeesLondon, EnglandLittlefish Group is an IT managed services company. Their midsize team is located in Nottingham, England; Sheffield, England and London, England. The company specializes in IT managed services, Cybersecurity, IT strategy consulting, and cloud consulting & SI.Read More
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46$50,000+10 - 49 employeesLondon, EnglandFounded in 2023, Opstergo is a cloud consulting & SI company. The small Zagreb, Croatia-based team specializes in cloud consulting & SI, devops managed services, and cybersecurity.Read More
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47$1,000+50 - 249 employeesLondon, EnglandWQsoftwares, a Marketing Strategy company, was established in 2014. The midsize team provides Marketing Strategy and cloud consulting & SI.Read More
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48$250,000+2 - 9 employeesLondon, EnglandSanRa is a Cybersecurity company established in 2022. The small team specializes in Cybersecurity.Read More
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49$5,000+50 - 249 employeesLondon, EnglandWavex Technology Ltd, an IT managed services company, was established in 1998. The firm offers IT managed services, cloud consulting & SI, IT strategy consulting, Cybersecurity, and more and has a midsize team. The firm is in London, England.Read More
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50Undisclosed1,000 - 9,999 employeesLondon, EnglandRead More
ValueLabs is a global business technology services and solutions provider based in Hyderabad, India with over 25 offices worldwide in the US, Europe, and Asia. Founded in 1997, ValueLabs' team of over 5,000 employees provides non-voice BPO/back office services and voice/call center capabilities.
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51$1,000+10 - 49 employeesLondon, EnglandRead More
Altahonos is a digital reputation company based in London with offices in San Francisco and Istanbul. The company, founded in 2017, has a team of more than ten that provides cybersecurity, branding, digital strategy, SEO, and IT strategy consulting services to various clients and companies.
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52Undisclosed250 - 999 employeesLondon, EnglandFounded in 1986, Online Business Systems is a Cybersecurity company. The team specializes in Cybersecurity and IT strategy consulting.Read More
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53Undisclosed250 - 999 employeesLondon, EnglandProfessional Advantage is a midsize ERP consulting and SI company in North Sydney, Australia and Melbourne, Australia. Their services include ERP consulting and SI and cloud consulting & SI.Read More
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54$10,000+50 - 249 employeesStanmore, EnglandMicromindercs is a Cybersecurity company. Launched in 2018, the team focuses on Cybersecurity and IT managed services.Read More
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55Undisclosed50 - 249 employeesLondon, EnglandCyberOne, a Cybersecurity company, was founded in 2005. The company specializes in Cybersecurity and IT managed services, and is midsize.Read More
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56Undisclosed250 - 999 employeesLondon, EnglandIT strategy consulting company Air IT Group was established in 2005. The team provides IT strategy consulting and cloud consulting & SI.Read More
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57$1,000+50 - 249 employeesLondon, EnglandMidsize Cybersecurity company Clear Infosec, is based in Jersey City, New Jersey and Toronto, Canada. The team focuses on Cybersecurity and IT strategy consulting.Read More
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58Undisclosed250 - 999 employeesLondon, EnglandRedscan is a Cybersecurity company founded in 2015. Their team offers Cybersecurity.Read More
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59$1,000+2 - 9 employeesLondon, EnglandForensic Control, a Cybersecurity company, was launched in 2008. The team provides Cybersecurity and Litigation Support Services.Read More
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60$250,000+10,000+ employeesLondon, EnglandSpetsnaz Security International Limited is a Business Consulting company. The team is based in London, England, and their services include Business Consulting and Building Security Services.Read More
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