nomoat / CertObserver / Alternatives
Alternatives to CertObserver
CertObserver: Finds hosts under your domains from certificate logs, watches their SSL certificates and warns you before they expire. Here are 4 other products that do a similar job. Of these, 4 have a free plan, 1 sells for a one-off price.
- CertPost
Reads the SSL certificate each of your hosts serves and emails warnings before it expires or breaks, for teams and agencies.
Free plan · Uptime and monitoring · Agencies
- Maintenant
One container that watches your Docker or Kubernetes server's containers, endpoints, certificates, cron jobs and resources.
Since 2026
Free plan · Uptime and monitoring · Developers
- Certimon
Tracks SSL certificates on any number of domains and warns you before they expire via Telegram, Teams, PagerDuty or webhooks.
Since 2025
Free · Uptime and monitoring
- Domain Locker
Keeps every domain you own in one dashboard and alerts you to expiry dates, DNS and SSL changes.
Free plan · Uptime and monitoring