Independent · evidence-based · not an accreditation body
The independent directory of penetration testing companies
Compare 53 vetted UK providers by accreditation, service, and size. Every firm is listed from public records — CREST Marketplace, the NCSC CHECK list, company sites — with the source linked, never invented.
Neutral, not a vendor
We don't sell testing and we're not affiliated with any firm or accreditation body. The directory compares providers on checkable facts, not marketing.
Every claim is sourced
Accreditations like CREST and NCSC CHECK are verified against public registers, and the source is linked on every profile so you can check it yourself.
Real firms only
We would rather list fewer companies we've verified than pad the directory. No invented firms, no fake reviews, no ratings we haven't earned.
Most accredited UK firms
Ordered by verified accreditations — not by payment.
Claranet Cyber Security
Large (201–1000)
Cyber security division of Claranet providing CREST-accredited penetration testing, application testing and managed security services.
Pen Test Partners
Size not stated
UK consultancy offering CREST-accredited penetration testing across web, mobile, infrastructure and specialist areas such as maritime, automotive and aviation.
Cyberfort Limited
Large (201–1000)
UK cyber security group offering CREST-accredited penetration testing, incident response and secure hosting.
MDSec Consulting Ltd
Mid-size (51–200)
UK consultancy specialising in CREST-accredited penetration testing and financial-sector threat-led testing (CBEST, GBEST, TIBER-EU).
AmberWolf
Small (11–50)
UK offensive security firm offering CREST-accredited penetration testing and financial-sector threat-led testing (STAR-FS).
Avord Ltd
Small (11–50)
UK provider delivering CREST-accredited penetration testing through an online security-testing platform.