Penetration Testing UK

Find It First

Find your weaknesses before criminals do

You can't fix a vulnerability you don't know about. Penetration testing puts your defences to the test with a controlled, real-world attack carried out by ethical security specialists - safely exposing the gaps a genuine attacker would target.

Our testing simulates the tactics used against UK businesses every day, from phishing and stolen credentials to unpatched software and misconfigured systems. You get a clear, prioritised picture of your risk - and a practical plan to close every gap.

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Penetration testing revealing vulnerabilities across networks, devices and cloud systems

What We Test

Where we look for weaknesses

Attackers probe every part of your business. Our testing covers the systems and entry points they are most likely to exploit.

Networks & Infrastructure

Internal and external network testing to uncover open ports, weak configurations and paths an attacker could use to move through your systems.

Web Applications & Sites

Testing of websites, portals and web apps for flaws such as injection, broken authentication and insecure data handling.

Cloud & Microsoft 365

Review of cloud configurations, identity and access settings to catch the misconfigurations that expose data in modern cloud environments.

Social Engineering

Optional simulated phishing and pretext testing to measure how your people respond to the human-focused attacks criminals rely on.

Endpoints & Devices

Assessment of laptops, servers and mobile devices to find unpatched software, weak settings and other footholds an attacker could exploit.

Access & Credentials

Testing password strength, access controls and privilege boundaries to see how far a single compromised account could reach.

How It Works

Our penetration testing process

Every test is carefully scoped and controlled, so you get maximum insight with zero disruption to your business.

01

Scope

We agree exactly what will be tested, when, and the rules of engagement - so testing is safe, legal and aligned with your priorities.

02

Test

Our specialists probe your systems using the same techniques as real attackers, safely attempting to exploit any weaknesses they find.

03

Report

You receive a clear, prioritised report - what we found, how serious it is, and exactly how to fix it, in plain English.

04

Remediate & Retest

We can carry out the fixes for you and retest to confirm every issue is resolved, closing the loop with confidence.

612k

UK businesses were affected by a cyber-attack or breach in the last 12 months

Source: Cyber Security Breaches Survey 2025/26, DSIT

Why It Matters

Proof, not guesswork

A vulnerability scan tells you what might be wrong. A penetration test proves what an attacker could actually do - which weaknesses are genuinely exploitable, and how much damage they could cause.

That evidence helps you focus effort where it matters, satisfy clients and insurers who ask for proof of testing, and support compliance with standards such as UK GDPR. Regular testing keeps you a step ahead as threats evolve.

Know exactly where you are exposed
Prioritise fixes by real-world risk
Evidence of due diligence for clients and insurers

Explore Security Assessments

Common Questions

Penetration testing FAQs

What is penetration testing?

Penetration testing, or pen testing, is a controlled cyber-attack carried out by ethical security specialists to find and safely exploit weaknesses in your systems. It shows you exactly how a real attacker could get in - and how to stop them - before a criminal does.

What's the difference between penetration testing and a vulnerability scan?

A vulnerability scan is an automated check that lists potential weaknesses. A penetration test goes further: a skilled tester manually attempts to exploit those weaknesses to prove which ones are genuinely exploitable and how far an attacker could get, giving you far more meaningful results.

How often should we have a penetration test?

Most businesses test at least once a year, and again after any significant change - a new application, a network redesign, a move to the cloud or a major software rollout. Regular testing keeps pace with an evolving threat landscape.

Will penetration testing disrupt our business?

No. Testing is carefully scoped and scheduled with you in advance to avoid disruption. Our specialists work within agreed rules of engagement so your systems and data stay safe throughout, and you receive a clear report once testing is complete.

What do we get at the end of a penetration test?

You receive a clear, prioritised report setting out the vulnerabilities we found, how serious each one is, and practical steps to fix them. We talk you through the findings and can carry out the remediation work for you if you'd like.

Penetration testing pairs well with a broader security assessment. Explore all our cyber security services.