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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121$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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122$5,000+50 - 249 employeesBath, EnglandIT managed services company Westgate IT is in Bath, England and Avon, England. They offer IT managed services and cloud consulting & SI.Read More
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123Undisclosed10 - 49 employeesRuddington, EnglandCybersecurity company IK IT Solutions was established in 2020. The team specializes in Cybersecurity and IT managed services.Read More
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124$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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125Undisclosed10 - 49 employeesWalton-on-Thames, EnglandET Works is an IT strategy consulting company based in Walton-on-Thames, England and Hokksund, Norway. Their services include IT strategy consulting and cloud consulting & SI.Read More
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126Undisclosed50 - 249 employeesGloucestershire, EnglandRipjar is an AI development company. Established in 2012, the firm is based in Gloucestershire, England. Their services include Artificial Intelligence and BI & big data consulting & SI.Read More
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127Undisclosed50 - 249 employeesDoncaster, EnglandDigitalXRAID is a cloud consulting & SI and Cybersecurity company. The Doncaster, England-based company provides cloud consulting & SI and Cybersecurity.Read More
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128Undisclosed50 - 249 employeesPortsmouth, EnglandSearchlight Cyber is a Cybersecurity company. They are based in Portsmouth, England and have midsize team. They focus on Cybersecurity.Read More
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129Undisclosed2 - 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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130Undisclosed10 - 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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131$1,000+10 - 49 employeesAltrincham, EnglandElite IT Team is an Altrincham, England-based SEO agency. They offer Search Engine Optimization and Web Design.Read More
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132$5,000+2 - 9 employeesLetchworth, EnglandIT managed services company Edge IT was founded in 2012. The team provides IT managed services and Cybersecurity and is located in Letchworth, England.Read More
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133$1,000+10 - 49 employeesLondon, EnglandEstablished in 2018, Ictnet Limited is a small IT strategy consulting company. Their team offers IT strategy consulting and BI & big data consulting & SI.Read More
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134$1,000+10 - 49 employeesBishop's Stortford, EnglandGenmar (UK) Ltd is an IT managed services company. Established in 1996, the team offers IT managed services and cloud consulting & SI.Read More
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135$25,000+10 - 49 employeesLondon, EnglandElecti Consulting is an AI development company. Established in 2017, the team provides Artificial Intelligence and Blockchain. The agency is based in London, England and Λεμεσός, Cyprus.Read More
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136$25,000+10 - 49 employeesAltham, EnglandSundown Solutions is an IT managed services company. Founded in 2008, their team specializes in IT managed services and IT strategy consulting.Read More
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137$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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138$1,000+10 - 49 employeesSheffield, EnglandIT managed services company One2Call Ltd is in Sheffield, England. Their services include IT managed services and unified communications consulting & SI.Read More
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139$1,000+2 - 9 employeesEast Kilbride, ScotlandIteko ltd is an IT strategy consulting company. The East Kilbride, Scotland-based firm was founded in 2022. Their services include IT strategy consulting and Cybersecurity.Read More
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140Undisclosed2 - 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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141Undisclosed10 - 49 employeesBirmingham, EnglandEquilibrium Security is a Birmingham, England-based Cybersecurity company. Their services include Cybersecurity and Corporate Training & Coaching.Read More
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142Undisclosed50 - 249 employeesCambridge, EnglandFeaturespace is an artificial intelligence company. Launched in 2008, the firm is based in Cambridge, England and London, England. Their services include Artificial Intelligence and Cybersecurity.Read More
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143Undisclosed50 - 249 employeesCity of London, EnglandCloudscape IT Support London is a midsize IT strategy consulting company in City of London, England and London, England. The team focuses on IT strategy consulting and cloud consulting & SI.Read More
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144Undisclosed50 - 249 employeesLondon , EnglandDarkbeam is a midsize Cybersecurity company launched in 2017. Their team specializes in Cybersecurity.Read More
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145$1,000+10 - 49 employeesLeeds, EnglandLaunched in 2011, Sycom Integrated Solutions LTD is a small Leeds, England-based IT strategy consulting company. Their services include IT strategy consulting and cloud consulting & SI.Read More
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146$1,000+10 - 49 employeesGlasgow, ScotlandClickNetworks is an IT managed services company. The Glasgow, Scotland-based team provides IT managed services and Cybersecurity.Read More
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147Undisclosed10 - 49 employeesBromsgrove, EnglandIT strategy consulting company Technical Drive specializes in IT strategy consulting and cloud consulting & SI. They were established in 2008.Read More
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148$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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149$1,000+10 - 49 employeesCardiff, WalesCritical 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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150$1,000+2 - 9 employeesPlymouth, EnglandWestbrook Communications Ltd is an IT managed services company. The Plymouth, England-based company was founded in 2000. Their services include IT managed services and IT strategy consulting.Read More
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