External and internal penetration testing
We attack your network the way a criminal would: from the internet and from inside your office. You get a prioritised list of what to fix first.
Secure your business before hackers exploit it.
We simulate real-world cyberattacks to find your weak spots before criminals do, then show you exactly how to fix them.
Get a Free Security ConsultationNo obligation. Plain-English advice from UK-based specialists.
Sample findingsRetest: passed
CriticalAdmin login exposed to internetFixed
CriticalCustomer data reachable without loginFixed
HighStaff passwords reused across systemsFixed
MediumOutdated website pluginFixed
We find it. You fix it. We check it worked.
Small businesses are the main target.
43% of cyberattacks target small businesses. Attackers know smaller firms hold valuable customer and payment data but rarely have a security team watching it.
One breach can mean lost customers, regulator fines and weeks of disruption. In Extremis finds and closes the gaps first, so an attack never turns into a financial or reputational disaster.
What we do
Testing that fits a small business.
Web application and cloud security
We test your website, customer portals and cloud accounts (such as Microsoft 365, AWS and Azure) for flaws that could expose customer data.
Cyber Essentials compliance readiness
We check you against the Cyber Essentials requirements, fix the gaps with you and get you ready to certify, so you can win contracts that require it.
Why choose us
Serious security without the enterprise price tag.
Tailored to your budget
We scope each test around what matters most to your business, so you pay for the risks that are real, not a bloated package.
Reports you can actually read
No jargon. Every finding says what we found, why it matters and exactly how to fix it, in plain English.
UK-based, UK-qualified specialists
Our team holds UK Level 3 diplomas in cybersecurity and networking, and we work with small businesses every day, so we understand your budget and your risks.
Get in touch
Request a callback or quote.
Tell us a little about your business. We'll reply within one working day with a free, no-obligation consultation.