head to head · open source
Sentry vs kuvasz
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. kuvasz has 633 stars, 38 forks, 5 open issues and last shipped yesterday. Sentry leads on adoption by 6,978% (44,806 vs 633 stars). Sentry is written in Python under a custom or non-standard licence; kuvasz is written in Kotlin under AGPL-3.0. Sentry has attracted 11% as many forks as stars, kuvasz 6%. Sentry was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (monitoring), 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 | kuvasz | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 633 |
| License | Custom / other | AGPL-3.0 |
| Written in | Python | Kotlin |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 4.9K | ⑂ 38 |
| 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 kuvasz if
- You want the kuvasz feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Kotlin
- You evaluated both and kuvasz 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 kuvasz
Kuvasz is an open source, self hosted uptime and SSL monitoring service written in Kotlin, built for teams, homelab operators and infrastructure engineers who want to watch their websites, services and TLS certificates on infrastructure they control rather than on a vendor's platform.
read the full kuvasz overview →
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Frequently asked questions
Is Sentry or kuvasz more popular?
Sentry has 44,806 GitHub stars and kuvasz has 633. Sentry has the larger community by that measure.
Are Sentry and kuvasz free?
Both are open source. Sentry has no licence declared in this registry, and kuvasz is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Sentry and kuvasz?
Sentry is written in Python and kuvasz in Kotlin. 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 kuvasz?
Choose Sentry if you want the larger community (44,806 stars) or its Custom / other licence terms. Choose kuvasz if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.