head to head · open source
Sentry vs guider
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. guider has 682 stars, 103 forks, 26 open issues and last shipped today. Sentry leads on adoption by 6,470% (44,806 vs 682 stars). Sentry is written in Python under a custom or non-standard licence; guider is written in Python under GPL-2.0. Sentry has attracted 11% as many forks as stars, guider 15%. guider was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (hacktoberfest, 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 | guider | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 682 |
| License | Custom / other | GPL-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 4.9K | ⑂ 103 |
| 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 guider if
- You want the guider feature set and don't need the biggest community
- You prefer the GPL-2.0 license terms
- Your stack matches Python
- You evaluated both and guider 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 guider
Guider is a GPL 2.0 licensed, Python based system profiling and fault detection tool for Linux and Android, built for application developers and system engineers who need to measure, trace and monitor kernel and user space behaviour without operating a separate monitoring server.
read the full guider overview →
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Frequently asked questions
Is Sentry or guider more popular?
Sentry has 44,806 GitHub stars and guider has 682. Sentry has the larger community by that measure.
Are Sentry and guider free?
Both are open source. Sentry has no licence declared in this registry, and guider is licensed under GPL-2.0. Both are free to self-host.
What is the difference between Sentry and guider?
Sentry is written in Python and guider in Python. 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 guider?
Choose Sentry if you want the larger community (44,806 stars) or its Custom / other licence terms. Choose guider if its feature set, stack or GPL-2.0 licence fits better. Both are self-hostable.