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Nagios CoreM/Monit
Free

Free and open source. Hosting, hardware and any external services are separate.

 Paid

Commercial software sold through the developer's shop.

Self-hosted Self-hosted
  • Runs plugin-based checks
  • Tracks availability and sends notifications
  • Central view of many Monit hosts
  • Automatic restart and repair of failing processes
  • Configuration and many checks need manual setup or additional plugins.
  • Paid license required
  • Depends on Monit running on each host
Self-hosted Self-hosted
Open source Closed source
License: GPL-2.0 License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 1, 2026

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