Top 100 Penetration Testing Companies in the United Kingdom
The Best of December 2025Looking for a top penetration testing company in the United Kingdom?
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 United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United Kingdom Penetration Testing Services
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151Undisclosed2 - 9 employeesGreenside, EnglandMunki computer Help, an IT strategy consulting company, was established in 2017. The firm specializes in IT strategy consulting and IT managed services.Read More
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152Undisclosed2 - 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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153Undisclosed10 - 49 employeesCity of London, EnglandIT strategy consulting company Neos-IT was founded in 2001. The agency focuses on IT strategy consulting and cloud consulting & SI.Read More
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154Undisclosed10 - 49 employeesCity of London, EnglandPortman Tech, an IT strategy consulting company, was founded in 2004. The company specializes in IT strategy consulting and cloud consulting & SI.Read More
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155Undisclosed10 - 49 employeesCity of London, EnglandAppsecco is a Cybersecurity company launched in 2015. The company provides Cybersecurity.Read More
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156Undisclosed10 - 49 employeesLondon, EnglandOrpheus Cyber, a Cybersecurity company, is based in London, England and McLean, Virginia. The team focuses on Cybersecurity.Read More
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157$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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158Undisclosed50 - 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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159Undisclosed50 - 249 employeesAylesbury, EnglandRed Helix is a Cybersecurity company. The firm is in Aylesbury, England. Their services include Cybersecurity and IT managed services.Read More
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160Undisclosed2 - 9 employeesCambuslang, ScotlandInettek is an IT managed services company. Established in 2006, the agency provides IT managed services and CRM consulting and SI.Read More
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161$1,000+2 - 9 employeesBirmingham, EnglandForfend Information Security Ltd is an IT strategy consulting company. The team provides IT strategy consulting and cloud consulting & SI, and the company is located in Birmingham, England.Read More
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162$1,000+10 - 49 employeesExeter, EnglandIT Champion Ltd is an IT managed services company. The team specializes in IT managed services and IT strategy consulting and is in Exeter, England and London, England.Read More
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163$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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164Undisclosed2 - 9 employeesHavant, EnglandCYBRID is an IT strategy consulting company. The team focuses on IT strategy consulting and cloud consulting & SI, and the agency is based in Havant, England and City of London, England.Read More
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165Undisclosed10 - 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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166Undisclosed10 - 49 employeesManchester, EnglandHedgehog Security is a Cybersecurity company. The firm is in Manchester, England. Their services include Cybersecurity.Read More
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167Undisclosed250 - 999 employeesEdinburgh, ScotlandCybersecurity company Adarma Security is located in Edinburgh, Scotland and City of London, England. Their services include Cybersecurity and BI & big data consulting & SI.Read More
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168Undisclosed250 - 999 employeesLondon, EnglandIntegrity360 is a Cybersecurity company. The Dublin 18, Ireland-based firm was founded in 2005. Their team provides Cybersecurity and IT managed services.Read More
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169$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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170Undisclosed2 - 9 employeesHorsham, EnglandCybersecurity company PocketSIEM is located in Horsham, England. They specialize in Cybersecurity and were established in 2019.Read More
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171Undisclosed10 - 49 employeesCity of London, EnglandCybersecurity and IT managed services company Connect Digital Security was launched in 2016. The team specializes in Cybersecurity and IT managed services.Read More
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172Undisclosed10 - 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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173Undisclosed2 - 9 employeesManchester, EnglandSectech Solutions is a branding agency. The firm is based in Manchester, England. Their services include Branding and Public Relations.Read More
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174Undisclosed250 - 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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175$5,000+50 - 249 employeesGateshead, EnglandAdvantex Network Solutions Limited is a midsize IT strategy consulting company. They offer IT strategy consulting and cloud consulting & SI and were established in 2002.Read More
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176Undisclosed50 - 249 employeesCity of London, EnglandWizard Cyber is a Cybersecurity company. Launched in 2017, the firm is headquartered in City of London, England. Their team offers Cybersecurity and cloud consulting & SI.Read More
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177Undisclosed50 - 249 employeesCity of London, EnglandRiverSafe Limited, a Cybersecurity company, was established in 2008. The team offers Cybersecurity and cloud consulting & SI.Read More
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178$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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179Undisclosed250 - 999 employeesBirmingham, EnglandResillion, an Application Testing company, was launched in 2022. The midsize team focuses on Application Testing and Computer Engineering.Read More
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180Undisclosed2 - 9 employeesLondon, EnglandFounded in 2011, 2|SEC Consulting is a Cybersecurity company. The small team focuses on Cybersecurity and Application Testing.Read More
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