head to head · open source
Sentry vs viztracer
Sentry has 45,704 GitHub stars, 4,959 forks, 2,265 open issues and last shipped yesterday. viztracer has 7,774 stars, 480 forks, 33 open issues and last shipped 1 months ago. Sentry leads on adoption by 488% (45,704 vs 7,774 stars). Sentry is written in Python under a custom or non-standard licence; viztracer is written in Python under Apache-2.0. Sentry has attracted 11% as many forks as stars, viztracer 6%. 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 | viztracer | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 7.8K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-11-04 | 2026-09-26 |
| Forks | ⑂ 5.0K | ⑂ 480 |
| 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 viztracer if
- You want the viztracer feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and viztracer 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 viztracer
VizTracer VizTracer is a low overhead logging/debugging/profiling tool that can trace and visualize your python code execution. The front end UI is powered by Perfetto. Use "AWSD" to zoom/navigate . More help can be found in "Support Controls". Highlights Detailed function entry/exit information on timeline with source code Super easy to use, no source code change for most features, no package dependency Low overhead, probably the fastest tracer in the market Supports threading, multiprocessing, subprocess, async and PyTorch Powerful front end, able to render GB level trace smoothly Works on Linux/MacOS/Windows…
read the full viztracer overview →
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Frequently asked questions
Is Sentry or viztracer more popular?
Sentry has 45,704 GitHub stars and viztracer has 7,774. Sentry has the larger community by that measure.
Are Sentry and viztracer free?
Both are open source. Sentry has no licence declared in this registry, and viztracer is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Sentry and viztracer?
Sentry is written in Python and viztracer in Python. 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 viztracer?
Choose Sentry if you want the larger community (45,704 stars) or its Custom / other licence terms. Choose viztracer if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.