head to head · open source
Sentry vs Peekaping
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. Peekaping has 1,193 stars, 69 forks, 92 open issues and last shipped 4 months ago. Sentry leads on adoption by 3,656% (44,806 vs 1,193 stars). Sentry is written in Python under a custom or non-standard licence; Peekaping is written in Go under MIT. Sentry has attracted 11% as many forks as stars, Peekaping 6%. Sentry was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (monitor, 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 | Peekaping | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 1.2K |
| License | Custom / other | MIT |
| Written in | Python | Go |
| Last push | 2026-09-20 | 2026-05-24 |
| Forks | ⑂ 4.9K | ⑂ 69 |
| 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 Peekaping if
- You want the Peekaping feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and Peekaping 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 Peekaping
Peekaping is a self hosted uptime monitoring system built with Go on the server and React with TypeScript in the browser, released under the MIT license. It lives in the open source infrastructure and monitoring ecosystem as a direct alternative to Uptime Kuma, and it tracks the availability of websites, APIs, and other network services through a range of monitor types. The project ships with a web interface, status pages, and an alerting layer that can notify operators through many channels when a check fails. It is distributed primarily as Docker images and is documented at peekaping.com, with a live demo and a…
read the full Peekaping overview →
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Frequently asked questions
Is Sentry or Peekaping more popular?
Sentry has 44,806 GitHub stars and Peekaping has 1,193. Sentry has the larger community by that measure.
Are Sentry and Peekaping free?
Both are open source. Sentry has no licence declared in this registry, and Peekaping is licensed under MIT. Both are free to self-host.
What is the difference between Sentry and Peekaping?
Sentry is written in Python and Peekaping in Go. 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 Peekaping?
Choose Sentry if you want the larger community (44,806 stars) or its Custom / other licence terms. Choose Peekaping if its feature set, stack or MIT licence fits better. Both are self-hostable.