head to head · open source
Sentry vs micrometer
Sentry has 45,704 GitHub stars, 4,959 forks, 2,265 open issues and last shipped yesterday. micrometer has 4,909 stars, 1,155 forks, 309 open issues and last shipped 2 days ago. Sentry leads on adoption by 831% (45,704 vs 4,909 stars). Sentry is written in Python under a custom or non-standard licence; micrometer is written in Java under Apache-2.0. Sentry has attracted 11% as many forks as stars, micrometer 24%. 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 | micrometer | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 4.9K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 5.0K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Sentry if
- You weight community size — 46K 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 micrometer if
- You want the micrometer feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and micrometer fits your workflow better
About Sentry
Users and logs provide clues. Sentry provides answers. What's Sentry? Sentry is the debugging platform that helps every developer detect, trace, and fix issues. Code breaks, fix it faster. Official Sentry SDKs JavaScript Electron React Native Python Ruby PHP Laravel Go Rust Java/Kotlin Objective C/Swift C\ /F\ C/C++ Dart/Flutter Perl Clojure Elixir Unity Unreal Engine Godot Engine PowerShell Resources Documentation Discussions (Bugs, feature requests, general questions) Discord Contributing Bug Tracker Code Transifex (Translate Sentry\!)
read the full Sentry overview →
About micrometer
Micrometer Application Metrics An application metrics facade for the most popular monitoring tools. Instrument your code with dimensional metrics with a vendor neutral interface and decide on the monitoring backend at the last minute. More info on micrometer.io. Micrometer artifacts work with Java 8 or later with a few exceptions such as the micrometer java11 module and micrometer jetty11. Supported versions See Micrometer's support policy. Join the discussion Join the Micrometer Slack to share your questions, concerns, and feature requests. Snapshot builds Snapshots are published to repo.spring.io for every…
read the full micrometer overview →
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Frequently asked questions
Is Sentry or micrometer more popular?
Sentry has 45,704 GitHub stars and micrometer has 4,909. Sentry has the larger community by that measure.
Are Sentry and micrometer free?
Both are open source. Sentry has no licence declared in this registry, and micrometer is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Sentry and micrometer?
Sentry is written in Python and micrometer in Java. 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 micrometer?
Choose Sentry if you want the larger community (45,704 stars) or its Custom / other licence terms. Choose micrometer if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.