CertSonar – Comprehensive SSL, domain, and DNS monitoring with proactive alerts

Summary: CertSonar continuously monitors SSL certificates, domain registrations, and DNS records, sending alerts via email, push, webhook, or Slack 30, 14, and 7 days before expiration to prevent service disruptions and browser warnings.

What it does

It tracks SSL, domain, and DNS status together and notifies users ahead of expirations to ensure timely renewals. Alerts are delivered through multiple channels including email and Slack.

Who it's for

Website managers and administrators responsible for maintaining domain and certificate validity to avoid downtime or security warnings.

Why it matters

It prevents expired certificates or domains from causing site outages or browser warnings by providing early, multi-channel notifications.