Penetration Testing Providers in United Kingdom
Europe
UK-based penetration testing providers, many holding CREST, CHECK, and CBEST accreditations recognised by the National Cyber Security Centre (NCSC).
The UK has one of the most mature pen testing markets globally, with providers serving financial services under CBEST, government under CHECK, and commercial organisations across all sectors.
UK organisations operate under a distinctive mix of frameworks, CREST and CHECK for government-adjacent work, CBEST for major financial institutions regulated by the Bank of England, and NCSC guidance across critical national infrastructure. Providers here routinely serve financial services, government, and enterprises in London, Manchester, and Edinburgh, with expertise spanning everything from assumed-breach engagements to red-teaming aligned with TIBER-EU.
Most relevant: CREST-accredited pen testing providers.
Regions and cities in United Kingdom
Browse penetration testing providers by area within United Kingdom.
Featured Local Specialists
Providers headquartered in United Kingdom, ranked by overall score. These local firms often bring deeper market context and language coverage than global competitors.
Top Accreditations in United Kingdom
Compliance Expertise in United Kingdom
Editor’s Pick
Top-ranked in United Kingdom
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.
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.
Aardwolf Security
Boutique UK penetration testing consultancy in Milton Keynes specialising in manual, expert-led security assessments across web applications, APIs, cloud, and mobile platforms.
Aon Cyber Solutions
Cybersecurity consulting division of global insurance leader Aon, uniquely combining penetration testing with cyber risk quantification and insurance expertise.
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.
Bulletproof
CREST-accredited UK cybersecurity and compliance provider offering penetration testing, managed security services, and regulatory consultancy to over 2,000 customers from its Stevenage headquarters.
Claranet
CREST and CHECK-accredited European managed services provider delivering penetration testing with deep infrastructure and cloud hosting expertise.
Consider IT
Edinburgh-based CREST-accredited IT and cybersecurity firm. Pen testing for Scottish public sector, financial services, and commercial clients.
CovertSwarm
Subscription-based offensive cybersecurity firm delivering continuous cyber attack services with CREST STAR and CBEST accreditations from its London headquarters.
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.
CyberLab
Cardiff-based CREST and CHECK-accredited cyber security company delivering penetration testing, red teaming, and OT security assessments as part of the Chess Group.
Cyphere
CREST-accredited Manchester-based cyber security firm delivering penetration testing, managed security services, and compliance consultancy across the UK, Europe, and the USA.
Penetration Testing in United Kingdom, FAQs
How do I find a penetration testing provider in United Kingdom?+
We currently list 29 penetration testing providers serving United Kingdom. You can filter by service type, accreditation, compliance expertise, and pricing to find the best fit for your requirements. Each provider profile includes verified accreditations, service details, and independent scores based on our transparent methodology.
What accreditations should I look for in United Kingdom?+
Of the 29 providers listed for United Kingdom, 26 hold CREST accreditation, the most widely recognised standard for penetration testing quality in the Europe region. For European organisations, look for providers with ISO 27001 certification and expertise in GDPR, NIS 2, and DORA compliance.
How much does penetration testing cost in United Kingdom?+
Penetration testing costs in United Kingdom vary significantly based on scope and complexity. A standard web application test typically ranges from £5,000 to £25,000, network penetration tests from £10,000 to £30,000, and comprehensive red team engagements from £30,000 to over £100,000. Key cost factors include the number of targets, required accreditations, testing methodology, and whether on-site presence is needed. See our general pricing guide for more detail.