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Perimeter

Continuous attack surface management

Know exactly what you expose.

Perimeter continuously discovers, understands, and validates your external attack surface, so your teams always know what they expose, why it matters, and what changed.

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Operational timeline

Live

  1. New subdomain detected

    api-v2.example.com

  2. Technology fingerprint updated

    LaravelNginx

  3. Targeted DAST scan triggered

    Laravel · PHP · Nginx templates

  4. CRITICALExposed .env file discovered

    api-v2.example.com/.env

  5. Routed to owning team

    #payments-eng

Clarity over fear

Security tooling shouldn't be a panic attack.

Most tools hand engineering teams a static list of a hundred vulnerabilities with the context stripped away. Perimeter treats security as an operational visibility problem.

Visibility over alarmism
An exact inventory of what you own comes before any scanning.
Context over raw data
Every finding connects the who, what, and why behind it.
Signal over noise
Fingerprinting first prunes thousands of irrelevant checks.
Continuous over periodic
Your perimeter changes daily. An annual pentest doesn't.

How it works

Visibility → Context → Validation → Remediation

Never scan what you don't understand. Every stage feeds the next, so the findings that reach your team are the ones that matter.

  1. 01

    Visibility

    What do we own?

    Continuous discovery of domains, subdomains, IPs, and services: an exact, undeniable inventory before a single scan runs.

  2. 02

    Context

    What is it running?

    Fingerprint every asset's stack, ports, TLS, and headers so you understand an exposure before you judge it.

  3. 03

    Validation

    Can it actually be attacked?

    Targeted DAST that runs only the checks relevant to each asset's technology. Precise signal, no wasted compute.

  4. 04

    Remediation

    Who fixes it, and how?

    Findings land with the owning team, with the exact endpoint, the story of how it appeared, and clear steps to fix it.

Platform

One platform for your entire external attack surface.

Attack surface discovery

Subdomain enumeration and change detection that flags new assets the moment they appear.

Technology fingerprinting

Frameworks, languages, servers, and cloud providers identified from live responses.

Exposure assessment

TLS hardening, missing security headers, risky open ports, and exposed sensitive files.

Smart DAST

Fingerprint-driven scanning that only runs templates that match what each asset is.

Subdomain takeover detection

Catch dangling DNS records pointing at services you no longer control.

Operational timeline

Every discovery, change, and finding stitched into one chronological narrative.

Explore the platform

Built for complex organizations

Alerts reach the team that owns the asset. Nobody else.

Multi-brand groups, media houses, and enterprises organize assets by project, with role-based access scoped to each organization. The team behind one product is never spammed with another's alerts.

Who it's for

Built for the teams that build and secure software.

Engineering teams

Context and clear remediation steps, without alert fatigue.

DevOps & platform

Visibility into infrastructure changes, open ports, and exposed services.

Security teams

Continuous validation instead of point-in-time penetration tests.

Product leaders

Clear scorecards that translate security risk into product terms.

For AI-assisted builders · Coming soon

Built it with Lovable, Bolt, Cursor or v0? Check it before you ship.

Ship Check finds leaked keys, open databases, and exposed files, then hands you a fix prompt to paste straight into your AI tool. Free.

Try Ship Check

See your perimeter the way an attacker does.

Perimeter is onboarding early teams now. Tell us about your infrastructure and we'll set you up.

Request early access