head to head · open source
Sentry vs kmon
Sentry has 45,704 GitHub stars, 4,959 forks, 2,265 open issues and last shipped yesterday. kmon has 2,970 stars, 93 forks, 23 open issues and last shipped 2 months ago. Sentry leads on adoption by 1,439% (45,704 vs 2,970 stars). Sentry is written in Python under a custom or non-standard licence; kmon is written in Rust under GPL-3.0. Sentry has attracted 11% as many forks as stars, kmon 3%. Sentry was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (hacktoberfest, 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 | kmon | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 3.0K |
| License | Custom / other | GPL-3.0 |
| Written in | Python | Rust |
| Last push | 2026-11-04 | 2026-09-21 |
| Forks | ⑂ 5.0K | ⑂ 93 |
| 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 kmon if
- You want the kmon feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Rust
- You evaluated both and kmon 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 kmon
Linux Kernel Manager and Activity Monitor 🐧💻 The kernel is the part of the operating system that facilitates interactions between hardware and software components. On most systems, it is loaded on startup after the bootloader and handles I/O requests as well as peripherals like keyboards, monitors, network adapters, and speakers. Typically, the kernel is responsible for memory management , process management , device management , system calls , and security . Applications use the system call mechanism for requesting a service from the operating system and most of the time, this request is passed to the kernel…
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Frequently asked questions
Is Sentry or kmon more popular?
Sentry has 45,704 GitHub stars and kmon has 2,970. Sentry has the larger community by that measure.
Are Sentry and kmon free?
Both are open source. Sentry has no licence declared in this registry, and kmon is licensed under GPL-3.0. Both are free to self-host.
What is the difference between Sentry and kmon?
Sentry is written in Python and kmon in Rust. 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 kmon?
Choose Sentry if you want the larger community (45,704 stars) or its Custom / other licence terms. Choose kmon if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.