head to head · open source
Sentry vs Foundatio
Sentry has 44,806 GitHub stars, 4,857 forks, 2,265 open issues and last shipped today. Foundatio has 2,098 stars, 250 forks, 15 open issues and last shipped 2 days ago. Sentry leads on adoption by 2,036% (44,806 vs 2,098 stars). Sentry is written in Python under a custom or non-standard licence; Foundatio is written in C# under Apache-2.0. Sentry has attracted 11% as many forks as stars, Foundatio 12%. 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 | Foundatio | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 2.1K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | C# |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 4.9K | ⑂ 250 |
| 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 Foundatio if
- You want the Foundatio feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C#
- You evaluated both and Foundatio 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 Foundatio
Foundatio is an open source C library, published on NuGet under the Apache 2.0 licence, that provides pluggable foundation blocks — caching, queues, distributed locks, messaging, background jobs, file storage, and resilience — for building loosely coupled distributed applications.
read the full Foundatio overview →
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Frequently asked questions
Is Sentry or Foundatio more popular?
Sentry has 44,806 GitHub stars and Foundatio has 2,098. Sentry has the larger community by that measure.
Are Sentry and Foundatio free?
Both are open source. Sentry has no licence declared in this registry, and Foundatio is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Sentry and Foundatio?
Sentry is written in Python and Foundatio in C#. 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 Foundatio?
Choose Sentry if you want the larger community (44,806 stars) or its Custom / other licence terms. Choose Foundatio if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.