CREST Marketplace

Our Threat-led penetration testing won the ScotlandIS Digital Tech Award for Cyber Excellence, giving you confidence that our services meet industry standards across every region we operate in.

Closed Door Security is a leading brand in Threat-led penetration testing, the same methodology developed by the Central Bank of England and required under EU DORA regulation for financial systems. Rather than testing at random, we test what real attackers would actually do to your business, using genuine threat intelligence and scenario-based testing built on years of combating active ransomware groups.
Findings are delivered live through our Insights portal as we discover them. Find a vulnerability on Monday, see it on Tuesday, fix it Wednesday. No waiting weeks for a report before remediation begins.
Our services include:

Threat-Led Penetration Testing
Red Team Assessments
Web and Mobile Application Testing
Continuous Penetration Testing (PTaaS)
Continuous Automated Red Teaming (CART)
Cyber Essentials and Cyber Essentials Plus
IASME Cyber Assurance and Maritime Baseline

Operating from the UK, UAE, and USA, holding Crest Penetration Testing accreditation, NCSC Assured Service Provider status, and DESC certification in Dubai, we set the standard for delivering these services.