Independent penetration testing consultancy · UK
Find the gaps before they become incidents.
Authorised penetration testing for organisations that need to understand how their applications, infrastructure, people and premises stand up to a real-world attack.
What we assess
Security is more than the lock on the door.
Controls work as a system. We assess the building, the technology, the people operating it and the exceptions an attacker may exploit.
View all servicesApplication and API testing
Manual assessment of web applications and APIs, focused on exploitable weaknesses and business logic.
Infrastructure and wireless
Internal, external and wireless testing to identify viable attack paths across your environment.
Physical security assessments
An expert review of perimeter controls, access management, CCTV, visitor handling and security procedures.
A practical assessment
Attacker thinking. Professional delivery.
Threshold Security is led by a penetration tester with more than eight years of offensive security experience across physical, infrastructure, application and cloud environments.
Every engagement is tightly scoped, legally authorised and designed around your organisation. The outcome is not theatre—it is evidence your team can use to make better security decisions.
How it works
Straightforward from first call to final report.
- 01
Scope
We agree objectives, boundaries and success criteria.
- 02
Test
The assessment is conducted discreetly under written authorisation.
- 03
Report
You receive evidence, risk-ranked findings and practical actions.
Insights
Recent thinking
Insight
Unleashing the Full Spectrum: Red, Blue, and Purple Teaming in Penetration Testing
Red teams attack, blue teams defend, and purple teams make sure the two are actually talking to each other. Here is why all three matter.
Read article →Insight
The Hacker's Mindset: Bypassing Physical Security
How attackers think about physical access, and what that means for the way you defend it.
Read article →Insight
Bridging the Gap: Understanding the Interplay of Cybersecurity and Physical Security
Physical and digital security are treated as separate disciplines. In practice, a failure in one almost always enables a failure in the other.
Read article →Start a conversation
How resilient is your physical security?
Tell us what you need to understand. We will respond within one business day with sensible next steps.