Top 100 Penetration Testing Companies in England
The Best of December 2025Looking for a top penetration testing company in England?
Having vulnerable security poses a threat to your organization. In an age where data has become some of the most important assets that your company will have, improving security measures is always a must. Penetration testing aims to solve this problem by simulating real-life security breaches without the risk of an actual cyberattack. Also known as ethical hacking, this process helps identify weak spots within your IT network infrastructure by applying methods that real attackers would use.
A penetration testing company can assist you in determining your security vulnerabilities. Doing so will provide you with the information that you need to fortify your cybersecurity. Hiring the right penetration testing company can give you a significant advantage in safekeeping your virtual assets.
To assist you in your search for a partner, we’ve compiled this list of the top penetration testing services in England. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best England Penetration Testing Services
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151Undisclosed2 - 9 employeesLondon, EnglandMesoform Limited is an IT strategy consulting company headquartered in London, England. They focus on IT strategy consulting and cloud consulting & SI and were launched in 2016.Read More
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152Undisclosed2 - 9 employeesCity of London, EnglandCybersecurity company Defensity was launched in 2019. The team specializes in Cybersecurity and IT strategy consulting.Read More
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153$1,000+10 - 49 employeesBaulkham Hills, AustraliaINTELLIWORX Managed IT is a small IT strategy consulting company established in 2011. Their services include IT strategy consulting and IT managed services.Read More
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154Undisclosed10 - 49 employeesLondon, EnglandJUMPSEC Ltd is a Cybersecurity company founded in 2012. Their team specializes in Cybersecurity.Read More
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155Undisclosed2 - 9 employeesFrankfurt am Main, GermanyLaunched in 2015, Cobwebs Technologies is a small Cybersecurity company. Their services include Cybersecurity and Artificial Intelligence.Read More
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156$1,000+Freelancer employeesIstead Rise, EnglandHelpFully IT is an Istead Rise, England-based IT strategy consulting company. They offer IT strategy consulting and cloud consulting & SI.Read More
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157Undisclosed2 - 9 employeesLondon, EnglandLocated in London, England, TestPro Consulting Ltd is a small Cybersecurity company. Their services include Cybersecurity and Artificial Intelligence.Read More
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158Undisclosed2 - 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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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+50 - 249 employeesGloucester, EnglandCloud9 Data Solutions is a Cybersecurity company. Launched in 2018, the company specializes in Cybersecurity and Compliance Consulting.Read More
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SonyIndustries
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161Undisclosed2 - 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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162Undisclosed2 - 9 employeesBirmingham, EnglandDeplogy is an AI firm and Cybersecurity company. They offer Artificial Intelligence and Cybersecurity and were founded in 2013.Read More
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163Undisclosed2 - 9 employeesLondon, EnglandKiktronik Limited is a small London, England-based Cybersecurity company. Their services include Cybersecurity and IT managed services.Read More
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164Undisclosed10 - 49 employeesCity of London, EnglandAppsecco is a Cybersecurity company launched in 2015. The company provides Cybersecurity.Read More
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165$1,000+Freelancer employeesBiddenham, EnglandPeter Groom is an IT strategy consulting company. Their team is located in Biddenham, England. The company provides IT strategy consulting and Business Consulting.Read More
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166Undisclosed250 - 999 employeesAltrincham, EnglandData analytics company Matillion is headquartered in Denver, Colorado and Altrincham, England. They specialize in BI & big data consulting & SI and IT managed services.Read More
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167$50,000+10 - 49 employeesBrentford, EnglandFindErnest is a web design company. The firm is based in Hyderabad, India and Brentford, England. Their services include Web Design and UX/UI Design.Read More
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168$1,000+Freelancer employeesNewcastle upon Tyne, EnglandEstablished in 2023, Boxwire Technology Solutions is a small IT managed services company in Newcastle upon Tyne, England. Their team provides IT managed services and IT strategy consulting.Read More
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169$1,000+10 - 49 employeesLondon, EnglandCyberSRC Consultancy LLP is a Cybersecurity company. The team provides Cybersecurity and Application Testing and is headquartered in Noida, India and London, England.Read More
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170$5,000+1,000 - 9,999 employeesBelrose, AustraliaRead More
ERRNA is a blockchain company founded in 2015. The small San Jose, California-based team provides blockchain, cybersecurity, marketing strategy, mobile app development, and more.
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171Undisclosed10 - 49 employeesLondon, EnglandSolid Systems is an IT managed services company. Located in Cape Town, South Africa and Johannesburg, South Africa, their team focuses on IT managed services and cloud consulting & SI.Read More
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172$10,000+250 - 999 employeesGdynia, PolandRead More
Link Group Global, inc. Is an Austin, Texas-based human resources agency. The midsize company was established in 2015. Their services include HR services, IT managed services, and IT staff augmentation.
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DanoneIndustries
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173$10,000+250 - 999 employeesLondon, EnglandRead More
A1QA logo is a quality assurance and software testing company founded in 2002. Based in Denver, they have a team of 200+ employees that specialize in application testing and cybersecurity. They primarily serve midmarket clients in the IT and telecommunications industries.
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AdidasIndustries
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174UndisclosedFreelancer employeesBridlington, EnglandRelyWP is a small website development company. Launched in 2019, the team specializes in Web Development and Cybersecurity.Read More
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175$50,000+1,000 - 9,999 employeesUtrecht, NetherlandsRead More
IT strategy consulting and other IT consulting and SI company Black Box is headquartered in. The company provides IT strategy consulting and other IT consulting and SI and is large.The company was established in 1976.
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176Undisclosed10 - 49 employeesEvesham, EnglandPay per click company Qmulus Solutions is in Evesham, England. They provide Pay Per Click and CRM consulting and SI and were launched in 2022.Read More
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177$1,000+10 - 49 employeesMiddlesbrough, EnglandCyberSol360, a cloud consulting & SI company, was launched in 2022. The small team provides cloud consulting & SI and Cybersecurity.Read More
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178$25,000+10,000+ employeesParis, FrancePersistent Systems is a data analytics company. Established in 1990, the large agency is headquartered in Pune, India; Santa Clara, California; Paris, France and Lyne, England. Their services include BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, Custom Software Development, and more.Read More
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179Undisclosed1,000 - 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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180$25,000+1,000 - 9,999 employeesLondon, EnglandRead More
ELEKS is a custom software development firm established in 1991. Their large team is in Tallinn, Estonia; L'viv, Ukraine; Berlin, Germany and Rzeszów, Poland. Their services include Custom Software Development, BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, and more.
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BNY Mellon DPD Acino DRAXIndustries
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