Pen Testing Experts

Security testing is essential work, but it's only as good as the testers you use.

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Access a large team of highly skilled, experienced testers - organised around your needs

Get the right scope, the right priorities, the right findings, and the right actions

0330 390 0504

During our tendering, we found that Claranet (Sec-1) provided excellent responses to the questionnaire and also competitive pricing compared to other pen testing companies

The Guiness Partnership

The service from Sec-1 is always great. Engineers are very knowledgeable, account management is outstanding, and projects are always delivered on time

BCN Group

Know what you want testing?

If you know what you want to have pen tested you can submit your scope here and we will contact you to talk about delivery and pricing

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Our Pen Testing Portfolio.

  • Web Application
  • Infrastructure
  • Mobile
  • Continuous
  • Red Teaming
  • Social Engineering
  • Code Review
  • Cloud Security
Web application penetration testing

Web application penetration testing

Personal approach and in‑depth knowledge

Available to hackers 24x7 and brim-full of data, web applications present a tempting target for hackers. We provide clear reports with steps to reproduce vulnerabilities, exploitation probability and actionable recommendations

Infrastructure penetration testing

Infrastructure penetration testing

Don’t give a hacker an opportunity

Enhance the security in the technology that could provide unauthorised access or entry into private areas of your network and to your sensitive data.

Mobile application penetration testing

Mobile application penetration testing

Checking your app is coded securely

With the huge proliferation of mobile applications comes the need for robust security testing. We identify vulnerabilities and validate that the application is secure.

Continuous Security Testing

Continuous Security Testing

Combining industry-leading application-scanning technology and the expertise of senior penetration testers

Gain insight into vulnerabilities significantly faster than through traditional penetration testing with vulnerability notifications as new high-impact issues arise.

Red Team exercises

Red Teaming

A Red Team exercise is an all-out attempt to achieve the defined objectives by any methods available

This usually includes assessments with specific objectives in mind in order to simulate tactics, techniques and procedures used by real world adversaries.

Social Engineering

Social Engineering

Your best defensive strategy against social engineering is to raise employee security awareness and to educate on good practices.

Typical Social engineering engagements include managing phishing campaigns, testing physical entry procedures, baiting and watering hole attacks to ensure you are maximising the protection within your organisation.

Code Review

Code Review

In depth security review of your source code by using a combination of manual and automated checks to look for security flaws and insecure coding practices inside the source code which can lead to serious security risks.

Cloud Security

Cloud Security

Test applications and infrastructure hosted in public cloud environments, including security assessments of cloud environment configurations.

Why choose Claranet as your penetration testing and cybersecurity partner?



With 60+ pen testers, the breadth and depth of our expert team means we can react quickly when you need to move fast, delivering you the service you need in the way you need it.



We’ve refined our service experience over 20 years. Customers stay because they know we’re motivated by continually keeping them safe, not just ticking a box.



We find vulnerabilities that others don’t, expertly prioritising them and putting them in to your business context so you can be confident in the prioritisation of the fixes.


Outcome driven

The quality of our partnership, collaboration and debriefing sets us apart. We give you the insight you need, describing the business relevance.

Our accreditations

Cyber essentials
ISO 27001
CEH Accreditation
CCISO Accreditation
CISSP Accreditation
CRISC Accreditation
OSCE Accreditation
OSCP Accreditation