head to head · open source
Sentry vs effect
Sentry has 44,792 GitHub stars, 4,854 forks, 2,265 open issues and last shipped yesterday. effect has 16,097 stars, 747 forks, 253 open issues and last shipped yesterday. Sentry leads on adoption by 178% (44,792 vs 16,097 stars). Sentry is written in Python under a custom or non-standard licence; effect is written in TypeScript under MIT. Sentry has attracted 11% as many forks as stars, effect 5%. Sentry was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | effect | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 16K |
| License | Custom / other | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 4.9K | ⑂ 747 |
| 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 effect if
- You want the effect feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and effect 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 effect
Effect is a TypeScript library for building robust, maintainable, type safe, and production grade applications. It lives in the TypeScript and JavaScript ecosystem, distributed as the core effect package alongside a monorepo of integration packages that extend it. The project is MIT licensed, has been developed for roughly seven years, and currently ships Effect V4 as a release candidate, with the main branch holding v4 development and the v3 branch retaining the previous line.
read the full effect overview →
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Frequently asked questions
Is Sentry or effect more popular?
Sentry has 44,792 GitHub stars and effect has 16,097. Sentry has the larger community by that measure.
Are Sentry and effect free?
Both are open source. Sentry has no licence declared in this registry, and effect is licensed under MIT. Both are free to self-host.
What is the difference between Sentry and effect?
Sentry is written in Python and effect in TypeScript. 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 effect?
Choose Sentry if you want the larger community (44,792 stars) or its Custom / other licence terms. Choose effect if its feature set, stack or MIT licence fits better. Both are self-hostable.