head to head · open source
Sentry vs monolog
Sentry has 44,792 GitHub stars, 4,854 forks, 2,265 open issues and last shipped yesterday. monolog has 21,406 stars, 1,910 forks, 3 open issues and last shipped 9 days ago. Sentry leads on adoption by 109% (44,792 vs 21,406 stars). Sentry is written in Python under a custom or non-standard licence; monolog is written in PHP under MIT. Sentry has attracted 11% as many forks as stars, monolog 9%. 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 | monolog | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 21K |
| License | Custom / other | MIT |
| Written in | Python | PHP |
| Last push | 2026-09-17 | 2026-09-09 |
| Forks | ⑂ 4.9K | ⑂ 1.9K |
| 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 monolog if
- You want the monolog feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches PHP
- You evaluated both and monolog 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 monolog
Monolog is a logging library for PHP that sends log records to files, sockets, inboxes, databases, and various web services. It ships with the handlers, formatters, and processors needed to route records where they belong, and special handlers allow more advanced logging strategies than a single output stream. The library lives in the PHP ecosystem and is distributed through Packagist as monolog/monolog . It is released under the MIT license and has been developed for sixteen years, with more than twenty one thousand stars and roughly nineteen hundred forks on GitHub.
read the full monolog overview →
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Frequently asked questions
Is Sentry or monolog more popular?
Sentry has 44,792 GitHub stars and monolog has 21,406. Sentry has the larger community by that measure.
Are Sentry and monolog free?
Both are open source. Sentry has no licence declared in this registry, and monolog is licensed under MIT. Both are free to self-host.
What is the difference between Sentry and monolog?
Sentry is written in Python and monolog in PHP. 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 monolog?
Choose Sentry if you want the larger community (44,792 stars) or its Custom / other licence terms. Choose monolog if its feature set, stack or MIT licence fits better. Both are self-hostable.