head to head · open source
Sentry vs client_js
Sentry has 45,704 GitHub stars, 4,959 forks, 2,265 open issues and last shipped yesterday. client_js has 3,498 stars, 431 forks, 50 open issues and last shipped 4 days ago. Sentry leads on adoption by 1,207% (45,704 vs 3,498 stars). Sentry is written in Python under a custom or non-standard licence; client_js is written in JavaScript under Apache-2.0. Sentry has attracted 11% as many forks as stars, client_js 12%. 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 | client_js | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 3.5K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | JavaScript |
| Last push | 2026-11-04 | 2026-11-01 |
| Forks | ⑂ 5.0K | ⑂ 431 |
| 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 client_js if
- You want the client_js feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and client_js 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 client_js
Prometheus client for Node.js A prometheus client for Node.js that supports histogram, summaries, gauges and counters. Installation This package was previously published as prom client . See the CHANGELOG for the breaking changes involved in upgrading. API See example folder for a sample usage. The library does not bundle any web framework. To expose the metrics, respond to Prometheus's scrape requests with the result of await registry.metrics() . Default metrics There are some default metrics recommended by Prometheus itself. To collect these, call collectDefaultMetrics . In addition, some Node.js specific…
read the full client_js 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 client_js more popular?
Sentry has 45,704 GitHub stars and client_js has 3,498. Sentry has the larger community by that measure.
Are Sentry and client_js free?
Both are open source. Sentry has no licence declared in this registry, and client_js is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Sentry and client_js?
Sentry is written in Python and client_js in JavaScript. 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 client_js?
Choose Sentry if you want the larger community (45,704 stars) or its Custom / other licence terms. Choose client_js if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.