Top 100 Cybersecurity Companies in the United Kingdom
The Best of December 2025Looking for a top cybersecurity consultant in the United Kingdom?
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 United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
Jump to Most Reviewed Companies
List of the Best United Kingdom Cybersecurity Consultants
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271$1,000+2 - 9 employeesKidderminster, EnglandForever Group is a Kidderminster, England-based unified communications consulting & SI company. Established in 2009, the team offers unified communications consulting & SI and IT managed services.Read More
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272$1,000+2 - 9 employeesYeovil, EnglandDesign Your Desktop Limited is a web design agency launched in 2020. Their services include Web Design and IT strategy consulting.Read More
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273Undisclosed2 - 9 employeesLeigh, EnglandExpress IT is a small IT strategy consulting company. Founded in 2011, the team provides IT strategy consulting and cloud consulting & SI.Read More
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274$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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275$5,000+50 - 249 employeesSan Francisco, CARead More
RiskIQ is a cybersecurity company based in San Francisco with a team of just over 150 employees. Established in 2009, they provide cybersecurity, business intelligence, big data consulting, and software integration services to clients in a variety of industries.
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AmazonIndustries
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276$5,000+250 - 999 employeesLondon, EnglandBased in San Francisco, California and Reston, Virginia, Lookout is a Cybersecurity company. They specialize in Cybersecurity.Read More
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277$5,000+50 - 249 employeesLondon, EnglandIOActive is a Cybersecurity company. Located in Seattle, Washington and London, England, the agency was launched in 1998. Their team focuses on Cybersecurity.Read More
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278$10,000+250 - 999 employeesCourbevoie, FranceGuidance Software is a Cybersecurity company. Their midsize team is based in Pasadena, California and New York, New York. Their services include Cybersecurity and IT strategy consulting.Read More
Clients
BoxIndustries
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279$10,000+1,000 - 9,999 employeesTheale, EnglandRapid7 is a Cybersecurity company. Their large team is in Boston, Massachusetts and Manhattan Beach, California. Their services include Cybersecurity and IT managed services.Read More
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280$10,000+250 - 999 employeesLondon, EnglandCybereason is a Cybersecurity company. They are in Boston, Massachusetts and London, England, and their services include Cybersecurity and BI & big data consulting & SI.Read More
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281$10,000+250 - 999 employeesLondon, EnglandDigital Guardian, a midsize IT managed services company, is in Waltham, Massachusetts and Reston, Virginia. The team specializes in IT managed services and Cybersecurity.Read More
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282$10,000+250 - 999 employeesLondon, EnglandVeracode is a Cybersecurity company located in Burlington, Massachusetts and London, England. They focus on Cybersecurity and Application Testing and were established in 2006.Read More
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283$5,000+50 - 249 employeesBirstall, EnglandSec-1 is an IT managed services and Cybersecurity company. Launched in 2001, the firm is based in Birstall, England. Their team focuses on IT managed services and Cybersecurity.Read More
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284$5,000+50 - 249 employeesTheale, EnglandClearswift is a Cybersecurity company. Their midsize team is based in Theale, England and provides Cybersecurity. The agency was founded in 1982.Read More
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285Undisclosed2 - 9 employeesLeicester , EnglandBerea is a Cybersecurity company. The team focuses on Cybersecurity, and the agency is headquartered in Leicester , England.Read More
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286$1,000+1,000 - 9,999 employeesLondon, EnglandEmagine Consulting is a big data analytics company headquartered in London, England and Nanterre, France. They focus on BI & big data consulting & SI and Cybersecurity and were launched in 1994.Read More
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287$5,000+50 - 249 employeesLondon, EnglandLaunched in 2011, Digital Shadows is a Cybersecurity company. The midsize team specializes in Cybersecurity.Read More
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288$1,000+2 - 9 employeesSalford, EnglandLaunched in 2016, Defendza is a Cybersecurity company. The team provides Cybersecurity and IT strategy consulting.Read More
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289Undisclosed50 - 249 employeesLondon, EnglandRavelin Technology is an AI company and Cybersecurity company. They were launched in 2014, and their services include Artificial Intelligence and Cybersecurity.Read More
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290Undisclosed50 - 249 employeesBishop’s Stortford, EnglandSeceon Inc. Is a midsize artificial intelligence firm and Cybersecurity company. Launched in 2014, the team focuses on Artificial Intelligence and Cybersecurity.Read More
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291Undisclosed10 - 49 employeesEdinburgh, ScotlandEstablished in 2018, Blockchain Technology Partners Limited is a small Edinburgh, Scotland-based Cybersecurity company. Their services include Cybersecurity and IT strategy consulting.Read More
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292Undisclosed10 - 49 employeesCity of London, EnglandISTARI, a Cybersecurity company, was established in 2020. The team provides Cybersecurity and IT managed services.Read More
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293Undisclosed2 - 9 employeesCity of London, EnglandCybersecurity company Identiom Limited is headquartered in City of London, England. Their services include Cybersecurity and IT managed services.Read More
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294Undisclosed50 - 249 employeesCity of London, EnglandCrossword Cybersecurity Plc is a Cybersecurity company. The City of London, England-based agency was founded in 2014. Their team offers Cybersecurity and IT managed services.Read More
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295Undisclosed10 - 49 employeesBishops Cleeve, EnglandDark Rhino Security, a Cybersecurity company, is in Dublin, Ohio and Bishops Cleeve, England. Launched in 2017, the team focuses on Cybersecurity.Read More
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296Undisclosed250 - 999 employeesBelfast, Northern IrelandSilverSky is a Cybersecurity company. They are headquartered in Morrisville, North Carolina and Milford, Connecticut. Their team offers Cybersecurity.Read More
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297Undisclosed1,000 - 9,999 employeesLondon, EnglandEstablished in 1999, Secureworks is a large Atlanta, Georgia-based Cybersecurity company. Their services include Cybersecurity.Read More
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298Undisclosed50 - 249 employeesLondon, EnglandLaunched in 2011, ThreatSpike Labs is a midsize Cybersecurity company based in London, England. Their team specializes in Cybersecurity.Read More
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299Undisclosed250 - 999 employeesOxford, EnglandNominet is an Oxford, England-based Cybersecurity company. Launched in 1996, the team specializes in Cybersecurity.Read More
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300Undisclosed10 - 49 employeesLondon, EnglandHeadquartered in London, England, Darklabs is a small Cybersecurity company. Their services include Cybersecurity.Read More
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