Top 100 Cybersecurity Companies in London
The Best of August 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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301Undisclosed10 - 49 employeesCity of London, EnglandSmall IT strategy consulting company ITD UK, is based in City of London, England. The team provides IT strategy consulting and cloud consulting & SI.Read More
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302Undisclosed10 - 49 employeesCity of London, EnglandTipTop IT is an IT strategy consulting company. The small City of London, England-based team focuses on IT strategy consulting and cloud consulting & SI. The company was launched in 2008.Read More
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303Undisclosed10 - 49 employeesCity of London, EnglandAstute IT is an IT strategy consulting company. The team is based in City of London, England, and their services include IT strategy consulting and cloud consulting & SI.Read More
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304$1,000+2 - 9 employeesRomford, EnglandQloud IT Support is a Cybersecurity company established in 2020. The team provides Cybersecurity and IT strategy consulting.Read More
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305$1,000+Freelancer employeesWatford, EnglandCybersecurity company Magrathean UK is based in Watford, England. Their services include Cybersecurity and AI Consulting.Read More
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306$5,000+50 - 249 employeesLondon, EnglandConosco is an IT managed services company based in London, England. The team focuses on IT managed services and IT strategy consulting.Read More
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307$5,000+50 - 249 employeesHayes, EnglandEstablished in 2001, Armadillo is an IT managed services company. The agency specializes in IT managed services and IT strategy consulting.Read More
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308Undisclosed50 - 249 employeesLondon, EnglandBovill is a Financial Consulting company. They are in London, England and Singapore, Singapore and have midsize team. They specialize in Financial Consulting and Blockchain.Read More
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309Undisclosed50 - 249 employeesLondon, EnglandCybersecurity company ONEiO is based in Helsinki, Finland and London, England. They specialize in Cybersecurity and IT managed services.Read More
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310Undisclosed50 - 249 employeesLondon, EnglandStoneTurn is a Business Consulting company. Their team is based in Boston, Massachusetts and New York, New York and offers Business Consulting and Cybersecurity.Read More
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311Undisclosed10 - 49 employeesCity of London, EnglandAppsecco is a Cybersecurity company launched in 2015. The company provides Cybersecurity.Read More
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312Undisclosed2 - 9 employeesCity of London, EnglandEstablished in 2013, Cyber Sentinel is a Cybersecurity company. The agency specializes in Cybersecurity, and is small.Read More
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313Undisclosed50 - 249 employeesLondon, EnglandSharp Decisions is a Blockchain company established in 1990. The firm offers Blockchain and Cybersecurity, and is midsize.Read More
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314Undisclosed50 - 249 employeesLondon, EnglandFusion Global Business Solutions is an IT strategy consulting company. Founded in 1998, the agency is based in London, England. Their team offers IT strategy consulting and Cybersecurity.Read More
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315Undisclosed50 - 249 employeesLondon, EnglandAzeemi Technologies, a midsize IT strategy consulting company, is based in New York, New York and London, England. Their services include IT strategy consulting and ERP consulting and SI.Read More
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316Undisclosed50 - 249 employeesLondon, EnglandUBDS Digital is a cloud consulting & SI company in London, England. Their services include cloud consulting & SI and Cybersecurity.Read More
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317Undisclosed50 - 249 employeesLiverpool, EnglandMidsize Cybersecurity company IriusRisk, is headquartered in Alpharetta, Georgia and Liverpool, England. The team specializes in Cybersecurity and Artificial Intelligence.Read More
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318Undisclosed50 - 249 employeesLondon, EnglandEstablished in 2019, Ingentive, a midsize Cybersecurity company, is headquartered in London, England. Their team specializes in Cybersecurity and IT managed services.Read More
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319$100,000+2 - 9 employeesLondon, EnglandBLAKFRAME is a software development company located in London, England. Launched in 2025, the team focuses on Custom Software Development and Cybersecurity.Read More
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320Undisclosed10 - 49 employeesMoorgate, EnglandNg experts, an IT managed services company, provides IT managed services and Cybersecurity. The company is in Moorgate, England.Read More
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321$10,000+1,000 - 9,999 employeesBourne End, EnglandRead More
Pomeroy is an IT infrastructure solutions company based in Hebron, KY, with offices in Bourne End, UK, Pittsburgh, PA, and New York. Since it was founded in 1982, the team has grown to over 3,00 employees. Pomeroy provides IT managed services, non-voice BPO/back office services, and cybersecurity capabilities.
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322$1,000+2 - 9 employeesBarnet, EnglandCloud consulting & SI company Gclouds IT Consultancy Ltd provides cloud consulting & SI and IT strategy consulting. They are in Barnet, England.Read More
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323Undisclosed2 - 9 employeesCity of London, EnglandSonar IT is an IT strategy consulting company. The City of London, England-based firm was established in 2019. Their team focuses on IT strategy consulting and cloud consulting & SI.Read More
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324Undisclosed2 - 9 employeesCroydon, EnglandEstablished in 2001, Ingenious Ltd is a small IT strategy consulting company headquartered in Croydon, England. Their team focuses on IT strategy consulting and cloud consulting & SI.Read More
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325Undisclosed2 - 9 employeesLondon, EnglandKalita Partners is a Cybersecurity company. Their team is based in London, England and Paris, France and specializes in Cybersecurity and Business Consulting.Read More
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326Undisclosed2 - 9 employeesLondon, EnglandEstablished in 2020, Emergent Consulting is a small London, England-based Cybersecurity company. Their services include Cybersecurity and Blockchain.Read More
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327Undisclosed2 - 9 employeesRomford, EnglandIT Department is a Romford, England-based IT strategy consulting company. Their services include IT strategy consulting and unified communications consulting & SI.Read More
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328$5,000+2 - 9 employeeslondon, EnglandExquisitor is a small IT staff augmentation company. They focus on IT staff augmentation and IT managed services and were founded in 2026.Read More
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329$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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330$5,000+10 - 49 employeesLondon, EnglandCapita Cyber Security is an IT managed services company located in London, England. The team focuses on IT managed services and Cybersecurity.Read More
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