Best Cloud Pen Companies in United Kingdom
30 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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NCC Group
Global cybersecurity consultancy with CREST, CHECK, and CBEST accreditation, renowned for deep technical research and comprehensive penetration testing services.
SECFORCE
Canary Wharf-based adversary simulation and CBEST-aligned penetration testing consultancy, delivering CREST-accredited offensive security to UK financial services and other organisations with the most demanding requirements.
Nettitude
CREST, CHECK, and CBEST accredited UK consultancy within Lloyd's Register, delivering premium penetration testing for government and critical infrastructure.
Pen Test Partners
The UK's largest independent security testing firm, renowned for IoT/OT research, CBEST red teaming, and CHECK/CREST-accredited penetration testing across all sectors.
PwC Cyber Security
Global Big Four professional services firm delivering CREST, CHECK, and CBEST-accredited penetration testing and red teaming services from London, serving the UK's largest enterprises and regulated organisations.
Dionach
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.
MDSec
Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.
Secarma
Manchester-based independent cybersecurity consultancy with over 20 years of experience delivering CREST and CHECK-accredited penetration testing, red teaming, and compliance certification services.
Cyberis
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.
Aristi
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.
Bridewell
Fast-growing CREST and CHECK-accredited UK cybersecurity consultancy with deep expertise in critical national infrastructure sectors.
Best Cloud Pen Companies in United Kingdom, FAQs
How do I find the best cloud pen provider in United Kingdom?+
Start by shortlisting providers with verified cloud pen experience and accreditations that match your industry. This page lists 30 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.
What accreditations matter most for cloud pen in United Kingdom?+
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.
How much does cloud pen cost in United Kingdom?+
Cloud Pen 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.
How long does a cloud pen engagement take in United Kingdom?+
Most cloud pen 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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