head to head · open source
Sentry vs Checkmate
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. Checkmate has 10,857 stars, 1,206 forks, 114 open issues and last shipped yesterday. Sentry leads on adoption by 313% (44,806 vs 10,857 stars). Sentry is written in Python under a custom or non-standard licence; Checkmate is written in TypeScript under AGPL-3.0. Sentry has attracted 11% as many forks as stars, Checkmate 11%. Sentry was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (hacktoberfest), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Sentry | Checkmate | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 11K |
| License | Custom / other | AGPL-3.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 4.9K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Sentry if
- You weight community size — 45K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Checkmate if
- You want the Checkmate feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and Checkmate fits your workflow better
About Sentry
Sentry is an open source debugging platform for detecting, tracing, and fixing software issues in real time. It lives in the developer infrastructure ecosystem and provides error tracking and performance monitoring across languages, frameworks, and runtime environments.
read the full Sentry overview →
About Checkmate
Checkmate is an open source, self hosted monitoring application for infrastructure and observability. It is written in TypeScript and released under the AGPL 3.0 license. The repository contains the frontend and backend, and the project sits in the infrastructure monitoring ecosystem for teams that need to track servers, websites, and hardware status without relying on a hosted only product.
read the full Checkmate overview →
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Frequently asked questions
Is Sentry or Checkmate more popular?
Sentry has 44,806 GitHub stars and Checkmate has 10,857. Sentry has the larger community by that measure.
Are Sentry and Checkmate free?
Both are open source. Sentry has no licence declared in this registry, and Checkmate is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Sentry and Checkmate?
Sentry is written in Python and Checkmate in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Sentry or Checkmate?
Choose Sentry if you want the larger community (44,806 stars) or its Custom / other licence terms. Choose Checkmate if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.