head to head · open source
Sentry vs opencost
Sentry has 45,704 GitHub stars, 4,959 forks, 2,265 open issues and last shipped yesterday. opencost has 6,802 stars, 916 forks, 306 open issues and last shipped 7 days ago. Sentry leads on adoption by 572% (45,704 vs 6,802 stars). Sentry is written in Python under a custom or non-standard licence; opencost is written in Go under Apache-2.0. Sentry has attracted 11% as many forks as stars, opencost 13%. 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.
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Side by side
| Sentry | opencost | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 6.8K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-11-04 | 2026-10-29 |
| Forks | ⑂ 5.0K | ⑂ 916 |
| 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 opencost if
- You want the opencost feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and opencost 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 opencost
OpenCost — your favorite open source cost monitoring tool for Kubernetes and cloud spend OpenCost give teams visibility into current and historical Kubernetes and cloud spend and resource allocation. These models provide cost transparency in Kubernetes environments that support multiple applications, teams, departments, etc. It also provides visibility into the cloud costs across multiple providers. OpenCost was originally developed and open sourced by Kubecost. This project combines a specification as well as a Golang implementation of these detailed requirements. The web UI is available in the…
read the full opencost overview →
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Frequently asked questions
Is Sentry or opencost more popular?
Sentry has 45,704 GitHub stars and opencost has 6,802. Sentry has the larger community by that measure.
Are Sentry and opencost free?
Both are open source. Sentry has no licence declared in this registry, and opencost is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Sentry and opencost?
Sentry is written in Python and opencost in Go. 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 opencost?
Choose Sentry if you want the larger community (45,704 stars) or its Custom / other licence terms. Choose opencost if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.