Every night, Perimeter scans your domain the way an outsider would — exposed services, email spoofability, forgotten subdomains, expiring certs — and emails you what changed, in plain English, with the fix. Built for firms without a security team.
Read-only. We only check what's already public to anyone on the internet — no login, no intrusion. Takes ~10 seconds.
The #1 small-firm miss. Without it, anyone can send email as your domain — and most owners have no idea.
Forgotten dev/staging/admin/VPN hosts left open to the internet, found via certificate transparency — the same way attackers find them.
Expiring certs, missing security headers, a registration about to lapse — the boring things that become incidents.
Nightly scan, change alerts, and an auditor-ready report. Cancel anytime. Built by a security engineer, not a dashboard vendor.
Founder early-access. Run the free scan above first — then if the report worries you, that's exactly what the nightly watch is for.