27 cloud penetration testing providers serve United Kingdom clients. This list ranks them by accreditation depth, methodology, and editorial scoring. Cloud assessments require deep AWS/Azure/GCP expertise, IAM/identity testing competence, and familiarity with platform-specific misconfigurations including S3, IMDS, and serverless attack vectors. UK buyers should look for CREST accreditation, with CHECK-approved providers required for government work and CBEST for major financial institutions.
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UK offensive security consultancy delivering CREST-accredited penetration testing, adversary simulation and CBEST, TIBER-EU and TBEST threat-led testing, mainly for financial services and other large organisations.
Boutique UK penetration testing consultancy in Milton Keynes specialising in manual, expert-led security assessments across web applications, APIs, cloud, and mobile platforms.
Cybersecurity consulting division of global insurance leader Aon, uniquely combining penetration testing with cyber risk quantification and insurance expertise.
CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.
Fast-growing CREST and CHECK-accredited UK cybersecurity consultancy with deep expertise in critical national infrastructure sectors.
CREST and CHECK-accredited European managed services provider delivering penetration testing with deep infrastructure and cloud hosting expertise.
Edinburgh-based CREST-accredited IT and cybersecurity firm. Pen testing for Scottish public sector, financial services, and commercial clients.
Subscription-based offensive cybersecurity firm delivering continuous cyber attack services with CREST STAR and CBEST accreditations from its London headquarters.
CREST and CHECK-accredited UK penetration testing consultancy with CBEST approval, specialising in infrastructure, application, and simulated attack assessments across the public and private sectors.
Cardiff-based CREST and CHECK-accredited cyber security company delivering penetration testing, red teaming, and OT security assessments as part of the Chess Group.
CREST-accredited Manchester-based cyber security firm delivering penetration testing, managed security services, and compliance consultancy across the UK, Europe, and the USA.
Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.
Start by shortlisting providers with verified cloud pen testing experience and accreditations that match your industry. This page lists 27 providers offering cloud penetration testing to United Kingdom clients, ranked by accreditation depth, methodology, and editorial scoring. Compare scope, methodology, and pricing across at least three providers before committing.
UK buyers should look for CREST accreditation, with CHECK-approved providers required for government work and CBEST for major financial institutions. On top of those, Cloud assessments require deep AWS/Azure/GCP expertise, IAM/identity testing competence, and familiarity with platform-specific misconfigurations including S3, IMDS, and serverless attack vectors.
Cloud Pen Testing engagements in United Kingdom typically range from $5,000 to $50,000 depending on scope, complexity, and required accreditations. Boutique providers often start lower, while large consultancies and engagements requiring CREST, CBEST, or FedRAMP 3PAO accreditation sit at the higher end. Request fixed-scope quotes from at least three providers to benchmark fair market pricing.
Most cloud pen testing engagements in United Kingdom run between 1 and 4 weeks of active testing, plus 1 to 2 weeks for reporting and remediation review. Larger or more regulated engagements (red team programmes, multi-environment cloud assessments) can extend to 6 to 12 weeks. Build buffer time into procurement schedules to allow for accredited tester availability.
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