Top 100 Penetration Testing Companies in London
The Best of December 2025Looking for a top penetration testing company in London?
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 London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Penetration Testing Services
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61Undisclosed50 - 249 employeesLondon, 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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62Undisclosed50 - 249 employeesLondon , EnglandDarkbeam is a midsize Cybersecurity company launched in 2017. Their team specializes in Cybersecurity.Read More
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63$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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64Undisclosed10 - 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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65Undisclosed10 - 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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66Undisclosed10 - 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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67Undisclosed50 - 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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68Undisclosed250 - 999 employeesCity of London, EnglandCybersecurity 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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69Undisclosed250 - 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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70$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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71$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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72Undisclosed10 - 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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73Undisclosed10 - 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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74Undisclosed50 - 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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75Undisclosed50 - 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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76$5,000+10 - 49 employeesLondon, EnglandLineal is a small Business Consulting company based in London, England and Hong Kong, Hong Kong. Their services include Business Consulting and Cybersecurity.Read More
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77Undisclosed2 - 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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78Undisclosed10 - 49 employeesCity of London, EnglandLabyrinth Technology is an IT strategy consulting company. Established in 2001, the firm provides IT strategy consulting and cloud consulting & SI.Read More
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79Undisclosed10 - 49 employeesCity of London, EnglandSSL247 is a Cybersecurity company. Founded in 2003, the team focuses on Cybersecurity and BI & big data consulting & SI. The agency is located in City of London, England.Read More
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80Undisclosed50 - 249 employeesCity of London, EnglandHeadquartered in City of London, England, UK IT SERVICE is a midsize IT strategy consulting company. Their services include IT strategy consulting and cloud consulting & SI.Read More
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81Undisclosed50 - 249 employeesCity of London, EnglandTribeca Technology Group is an IT strategy consulting company. They focus on IT strategy consulting and Cybersecurity and were launched in 2006.Read More
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82Undisclosed2 - 9 employeesCity of London, EnglandIn City of London, England and Phoenix, Arizona, Dasuni Limited is a Cybersecurity company. They specialize in Cybersecurity and IT managed services and were founded in 2005.Read More
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83Undisclosed250 - 999 employeesLondon, EnglandRED Global is a cloud consulting & SI company. The team is in London, England and Frankfurt am Main, Germany, and their services include cloud consulting & SI and Cybersecurity.Read More
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84$1,000+10 - 49 employeesHildenborough, EnglandRSK Cyber Security is a Cybersecurity company launched in 2021. The small Hildenborough, England-based team specializes in Cybersecurity, Application Testing, and cloud consulting & SI.Read More
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85$5,000+50 - 249 employeesLondon, EnglandCybersecurity company Cybernoq LTD is headquartered in London, England. Their services include Cybersecurity and IT managed services.Read More
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86Undisclosed10 - 49 employeesCity of London, EnglandHeadquartered in City of London, England and Dehradun, India, RedHunt Labs is a small Cybersecurity company. Their services include Cybersecurity and BI & big data consulting & SI.Read More
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87$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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88Undisclosed2 - 9 employeesCity of London, EnglandMagnetar IT is an IT strategy consulting company headquartered in City of London, England and Royal Leamington Spa, England. The team focuses on IT strategy consulting and cloud consulting & SI.Read More
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89Undisclosed50 - 249 employeesLondon, EnglandTelefónica Tech (EN), a Cybersecurity company, is headquartered in London, England. Established in 2019, the team specializes in Cybersecurity and IT managed services.Read More
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90Undisclosed2 - 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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