Checkmate vs Gatus
Checkmate and Gatus are both uptime monitoring software. Checkmate is open source under AGPL-3.0, with 11k GitHub stars. Gatus is open source under Apache-2.0, with 12k GitHub stars.
Which to pick
- Pick Checkmate when
- You want an Uptime Kuma-style monitor that also tracks server CPU, memory and disk.
- Pick Gatus when
- Developers want uptime checks defined as config in Git, with assertions on response content and timing.
Side by side
A self-hosted monitor for website uptime, response times, server hardware and incidents, with status pages.
A health dashboard and status page that checks endpoints against conditions defined in YAML, with alerting and incident announcements.
AGPL license, and hardware monitoring needs its separate agent.
Configuration lives in files, with no UI for adding monitors, which suits engineers more than operators.
Usable
Production-ready
Self-hosted server (both)
TypeScript, JavaScript and MongoDB
Go, Vue, PostgreSQL and SQLite
Open source, AGPL-3.0 (network copyleft)
Open source, Apache-2.0 (permissive)
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
You can build it into a product you sell, as long as you keep its copyright notice.
11k GitHub stars
12k GitHub stars
Established: started 2 years ago, latest release v3.13.1.
Established: started 7 years ago, latest release v5.38.0.
Other comparisons
More uptime monitors
Both sides were judged on 2026-11-03 from each project's README and GitHub data. License, age and popularity lines are worked out directly.