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HetrixToolsDomain Locker
Freemium

Free tier with 15 uptime and 32 blacklist monitors; paid plans add more.

 Free

Open source under MIT for self-hosting; hosted pricing is not stated in the research.

Web Web, Self-hosted
  • Generous free tier for uptime and blacklist monitoring
  • Checks from up to 12 locations
  • Tracks domains from many registrars in one place
  • Expiry and change alerts through many channels
  • Hosted only, with no self-hosted option
  • Requires an account
  • Most useful only for people managing several domains
  • Some features such as widgets are listed as coming soon
Web application, Hosted service Self-hosted, Hosted service
Closed source Open source
License not stated License: MIT
Account needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked September 23, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.