head to head · open source
Sentry vs micrometer
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. micrometer has 4,902 stars, 1,150 forks, 309 open issues and last shipped 2 days ago. Sentry leads on adoption by 814% (44,806 vs 4,902 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 23%. 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.
← all 20902 open source comparisons
Side by side
| Sentry | micrometer | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 4.9K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 4.9K | ⑂ 1.1K |
| 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 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
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 micrometer
Micrometer is a vendor neutral application observability facade for Java that lets developers instrument code with dimensional metrics once and decide on the monitoring backend at the last minute, and it is aimed at Java teams building cloud native and microservice applications that want observability without tying their instrumentation to a single monitoring tool.
read the full micrometer overview →
More in Infrastructure & Operations
Related comparisons
More Monitoring & Observability projects
Compare either of these against the rest of the Monitoring & Observability field.
Frequently asked questions
Is Sentry or micrometer more popular?
Sentry has 44,806 GitHub stars and micrometer has 4,902. 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 (44,806 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.