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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361$5,000+Freelancer employeesEsher, EnglandAlchemy Consulting Services Ltd is an IT strategy consulting company. They provide IT strategy consulting and AI Consulting and were established in 2024.Read More
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362$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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363$5,000+10 - 49 employeesSevenoaks, EnglandIT strategy consulting company Proxar IT was established in 2008. Located in Sevenoaks, England, the team focuses on IT strategy consulting and cloud consulting & SI.Read More
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364$5,000+50 - 249 employeesThundridge, EnglandEspria is a Thundridge, England-based IT strategy consulting company. They offer IT strategy consulting and cloud consulting & SI.Read More
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365$1,000+Freelancer employeesLondon, EnglandProsperaCore, a small AI Consulting company, is based in London, England. The team provides AI Consulting and Corporate Training & Coaching.Read More
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366Undisclosed2 - 9 employeesHemel Hempstead, EnglandCybersecurity company Security Everywhere Ltd. Is headquartered in Hemel Hempstead, England. They focus on Cybersecurity and were launched in 2020.Read More
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367$5,000+10 - 49 employeesLondon, EnglandADM computing is an IT managed services company launched in 1984. The company focuses on IT managed services and Cybersecurity, and is small.Read More
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368Undisclosed250 - 999 employeesOldbury, EnglandEstablished in 1997, A&O IT Group is a Cybersecurity company. The team focuses on Cybersecurity and AI Consulting.Read More
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369Undisclosed2 - 9 employeesLondon, EnglandBranding agency WESH UK is located in London, England. They focus on Branding and IT managed services.Read More
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370$1,000+10 - 49 employeesBishop's Stortford, EnglandRead More
Genmar (UK) Ltd is a small IT managed services company. Founded in 1996, the agency is located in Bishop's Stortford, United Kingdom. Their team focuses on IT managed services, voice services, cloud consulting & SI, cybersecurity, and more.
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371$1,000+10 - 49 employeesSevenoaks, EnglandIn Sevenoaks, England, Managed Service Provider is a small IT strategy consulting company. The team offers IT strategy consulting and cloud consulting & SI.Read More
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372Undisclosed2 - 9 employeesLondon, EnglandITGRC ADVISORY LTD. Is a small Cybersecurity company founded in 2020. Their team offers Cybersecurity and Compliance Consulting.Read More
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373Undisclosed10 - 49 employeesBerkhamsted, EnglandHeadquartered in Berkhamsted, England, Memgraph is a software development company. Founded in 2016, the team provides Custom Software Development and Cybersecurity.Read More
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374Undisclosed1,000 - 9,999 employeesBracknell, EnglandIT strategy consulting company Excis Compliance was established in 2001. The team provides IT strategy consulting and cloud consulting & SI and is in Bracknell, England and Navi Mumbai, India.Read More
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375$5,000+10 - 49 employeesLondon, EnglandOur IT Department is an IT managed services company in London, England. They focus on IT managed services and cloud consulting & SI.Read More
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376$5,000+10 - 49 employeesLondon, EnglandIT managed services company Databarracks was founded in 2003. The team provides IT managed services and Cybersecurity and is located in London, England.Read More
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377$5,000+10 - 49 employeesSurrey , EnglandClass Networks is an IT managed services company established in 1989. Headquartered in Surrey , England and London, England, the team offers IT managed services and cloud consulting & SI.Read More
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378Undisclosed10 - 49 employeesHounslow, EnglandPacific Infotech UK Ltd is a Hounslow, United Kingdom-based branding company. The small team offers branding, web design, ux/ui design, IT strategy consulting, and more and was launched in 2003.Read More
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379Undisclosed10 - 49 employeesLondon, EnglandLT Harper is a London, England-based cloud consulting & SI company. They focus on cloud consulting & SI and Cybersecurity.Read More
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380Undisclosed10 - 49 employeesCity of London, EnglandStack Digital is a small cloud consulting & SI company. The City of London, England-based company was founded in 2020. Their team focuses on cloud consulting & SI, BI & big data consulting & SI, cybersecurity, IT managed services, and more.Read More
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381Undisclosed50 - 249 employeesLondon, EnglandDATAMTX LLC, a business intelligence company, was launched in 1993. The midsize team specializes in BI & big data consulting & SI and ERP consulting and SI.Read More
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382UndisclosedFreelancer employeesLondon, EnglandXcina Security Team, a small Cybersecurity company, is in London, England. Their services include Cybersecurity and IT managed services.Read More
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383Undisclosed50 - 249 employeesTemple, EnglandEstablished in 2008, X4 Technology is a big data company. Their team provides BI & big data consulting & SI and Cybersecurity.Read More
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384$5,000+10 - 49 employeesStevenage, EnglandIT managed services company Primenet was launched in 1998. The firm focuses on IT managed services and Cybersecurity.Read More
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385$5,000+50 - 249 employeesGuildford, EnglandRamsac is an IT strategy consulting company. Headquartered in Guildford, England, the firm was founded in 1992. Their team offers IT strategy consulting and cloud consulting & SI.Read More
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386$10,000+2 - 9 employeesFarnborough, EnglandRead More
ACUMED Consulting Ltd is a data science and business analytics consultancy based in Hook, U.K. The consultancy, founded in 2010, has a team of less than ten that provides BI & big data consulting & SI, cybersecurity, AI, business consulting, and other application development services. ACUMED Consulting serves small and mid-market companies in various industries that include gaming, advertising & marketing, and health care & medical.
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387Undisclosed1,000 - 9,999 employeesCrawley, EnglandSpirent Communications is a Cybersecurity company in San Jose, California and Beijing, China. They offer Cybersecurity and IT managed services and were launched in 1936.Read More
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388$10,000+2 - 9 employeesWelwyn, EnglandColibri Digital, an artificial intelligence firm, was launched in 2015. The agency specializes in Artificial Intelligence and BI & big data consulting & SI, and is small.Read More
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389Undisclosed1,000 - 9,999 employeesBracknell, EnglandGlobal Knowledge is a cloud consulting & SI company founded in 1995. Their team specializes in cloud consulting & SI and Cybersecurity.Read More
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390$25,000+2 - 9 employeesFinchampstead, EnglandRead More
Melmac Solutions Limited is a cybersecurity company. Launched in 1995, the small agency is located in Finchampstead, United Kingdom. Their services include cybersecurity, blockchain, and financial advising & planning.
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