head to head · open source
Sentry vs opencost
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. opencost has 6,752 stars, 882 forks, 306 open issues and last shipped 4 days ago. Sentry leads on adoption by 564% (44,806 vs 6,752 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 | ★ 45K | ★ 6.8K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-09-20 | 2026-09-16 |
| Forks | ⑂ 4.9K | ⑂ 882 |
| 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 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
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 opencost
OpenCost is an Apache 2.0 licensed, Go based cost monitoring tool that gives platform, FinOps, and engineering teams visibility into current and historical Kubernetes resource allocation and multi cloud spend, built for anyone running Kubernetes clusters who needs to know what those clusters and their cloud services actually cost.
read the full opencost overview →
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Frequently asked questions
Is Sentry or opencost more popular?
Sentry has 44,806 GitHub stars and opencost has 6,752. 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 (44,806 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.