Security should not be a luxury.
We built Perimeter because we kept running into the same problem: the tools that give real external security visibility are built for enterprise budgets and enterprise teams. Smaller businesses — the ones that need it just as much — are left guessing.
Perimeter was started by three people who kept seeing the same gap: a security specialist, a data engineer, and a developer — all of us had worked with businesses trying to understand their external exposure and struggling because the right tools were either out of reach or buried in complexity.
Existing attack surface management platforms are powerful, but they're priced and designed for large security teams. A business with a small IT function, or one that relies on a managed service provider, has no good option between “nothing” and “enterprise contract.”
We wanted to change that. Perimeter is designed to give any business — regardless of size — the same quality of external visibility that was previously only available to organisations with dedicated security programmes.
We also knew AI could make a meaningful difference here. Modern language models are genuinely useful for surfacing patterns in security data, explaining findings in plain language, and prioritising what matters — and we've built that in from the ground up, not bolted it on.
Domain expertise
The checks Perimeter runs, the severity logic it applies, and the remediation guidance it surfaces are grounded in real security expertise — not scraped checklists.
Infrastructure built for scale
The platform is built to scan and correlate large volumes of external signals quickly and reliably — the kind of work that turns raw internet data into structured, actionable findings.
Built to be used, not just deployed
Security tools fail when they're too complex to use consistently. We've put significant effort into making Perimeter the kind of tool that gets opened regularly — not just during incidents.
What we believe
Visibility first
You cannot protect what you cannot see. The first step for any business is understanding what they actually expose to the internet — and that step should be free and instant.
Accessible does not mean shallow
Making security accessible is not about dumbing it down. It is about presenting real technical depth in a way that non-specialists can act on without needing to translate it themselves.
European by design
We are a European company building for European businesses. Our infrastructure stays in the EU, our practices are GDPR-compliant, and we take data sovereignty seriously — not as a marketing point, but as a baseline.