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Company directory

UK penetration testing companies

Compare 52 UK providers by accreditation and service. Firms are listed from public sources, such as the CREST Marketplace, the NCSC CHECK list and company sites, with the source linked on each listing.

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22 companies

London-based consultancy offering CREST-accredited penetration testing, incident response and PCI compliance.

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

UK offensive security firm offering CREST-accredited penetration testing and financial-sector threat-led testing (STAR-FS).

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

UK provider delivering CREST-accredited penetration testing through an online security-testing platform.

CREST-accredited
Social engineering testing

Cyber security division of Claranet providing CREST-accredited penetration testing, application testing and managed security services.

CREST-accreditedNCSC CHECK
Mobile application testingSocial engineering testing

UK-based cyber security firm (with UAE and US offices) offering CREST-accredited penetration testing.

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

UK cyber security firm offering CREST-accredited penetration testing including web and mobile application testing.

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

UK cyber security group offering CREST-accredited penetration testing, incident response and secure hosting.

CREST-accreditedNCSC CHECK
Infrastructure & network testingWeb application testingMobile application testingCloud configuration testing

UK consultancy (part of Reply) offering CREST-accredited penetration testing and financial-sector threat-led testing (STAR-FS).

CREST-accreditedNCSC CHECK

UK IT and cyber security firm offering CREST-accredited penetration testing and managed security services.

CREST-accredited

UK consultancy offering CREST-accredited penetration testing, incident response and information security auditing.

CREST-accreditedNCSC CHECK
Infrastructure & network testingWeb application testingMobile application testingCloud configuration testing

UK penetration testing firm holding CREST accreditation and Cyber Essentials Plus.

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

UK boutique penetration testing firm holding CREST accreditation and Cyber Essentials Plus.

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

UK vulnerability-management and attack-surface monitoring platform with CREST-accredited vulnerability assessment and PTaaS offering.

Web application testing

Research-led security firm with a UK CREST-accredited entity offering penetration testing and hardware/embedded security assessment.

CREST-accredited
Social engineering testing

UK consultancy specialising in CREST-accredited penetration testing and financial-sector threat-led testing (CBEST, GBEST, TIBER-EU).

CREST-accreditedNCSC CHECK
Infrastructure & network testingWeb application testingMobile application testingCloud configuration testing

UK consultancy offering CREST-accredited penetration testing across web, mobile, infrastructure and specialist areas such as maritime, automotive and aviation.

CREST-accreditedNCSC CHECK
Web application testingAPI security testingMobile application testingCloud configuration testing

UK penetration testing firm holding CREST accreditation and Cyber Essentials Plus.

CREST-accredited
Web application testingAPI security testingMobile application testing

Cheltenham-based consultancy offering CREST-accredited penetration testing and financial-sector threat-led testing (STAR-FS).

CREST-accreditedNCSC CHECK
API security testingMobile application testingCloud configuration testingSocial engineering testing

UK cyber security consultancy offering CREST-accredited penetration testing and vulnerability assessment.

CREST-accredited
Infrastructure & network testingWeb application testingMobile application testingCloud configuration testing

UK information security consultancy providing CREST-accredited penetration testing and Cyber Essentials certification.

CREST-accreditedNCSC CHECK
Infrastructure & network testingWeb application testingAPI security testingMobile application testing

Cyber division of Thomas Murray offering CREST-accredited penetration testing and incident response.

CREST-accredited
Infrastructure & network testingWeb application testingCloud configuration testingSocial engineering testing

Cambridge-based cyber security firm offering CREST-accredited penetration testing and managed security services.

CREST-accredited
Infrastructure & network testingWeb application testingAPI security testingCloud configuration testing
UK Penetration Testing Companies | PenTesting.org