Penetration testing from our London HQ

BREACHLINE LABS LIMITED, company no. 17072871. Our London office: 60 Tottenham Court Road, Office 1377, Fitzrovia, London W1T 2EW, as shown on our contact page. We are London-based, working with teams worldwide, and we build Nebula, an AI security testing engineer.

In October 2026, BreachLine was one of ten finalists at techUK's Cyber Innovation Den 2026, held in London on 6 October. Yash Korat, our Co-Founder & CEO, pitched Nebula to the judges. This year's competition looked for emerging technology that helps secure UK supply chains.

We work with small and mid-sized teams that run their own web apps, customer portals and APIs, and want them tested more often than once a year.

See How Nebula works and What comes as standard.

Because testing runs against internet-facing systems, nobody needs to visit your office. That suits London teams working across several sites or remotely. The process is:

1. Create an account with your company email and set up two-factor authentication.
2. Choose what to test, such as your website, portal, API or cloud services, and provide written authorisation for that scope. Testing a system without written authorisation is a criminal offence under the Computer Misuse Act 1990.
3. Provide test accounts if you want features behind sign-in tested, including user permissions and admin areas.
4. Set the task in your workspace, or brief Nebula by email: each AI staff member has its own email address.
5. Review, fix and retest.

If you need a scoped, point-in-time assessment rather than the platform, our team can deliver one with an agreed scope and a separate quote.

Our plans are the same price wherever you are, and are published on /pricing. From breachline.io/pricing, checked 16 October 2026.

Grit Consultancy's 2026 UK guide notes that central London day rates trend slightly higher than the national average. See our penetration testing cost guide for the full picture, and our CREST and AI pen testing comparison if a client or insurer has asked for an accredited report.

Often, yes. Cyber Essentials is a UK government-backed certification that helps organisations protect themselves against common cyber threats. It checks that basic controls are in place. A penetration test looks for weaknesses an attacker could exploit in the systems you have built and run. Clients and insurers may ask for either or both. See our guide to Cyber Essentials and penetration testing.

BreachLine is Cyber Essentials certified (certification body CDS Defence & Security), whole organisation, certified 20 Aug 2026, valid to 20 Aug 2027. Verify our certificate. Our security page has more on how we protect customer data. We are registered with the ICO (ref. ZC223129). We do not certify other businesses.

Free help is also available in London. The Cyber Resilience Centre for London is a police-led centre supporting micro, small and medium-sized organisations across the 32 boroughs and the City of London, with 1-to-1 crime prevention meetings and fully funded services; it also says it can help businesses become Cyber Essentials certified. The NCSC's small organisations guide covers backups, devices, accounts and scams.