head to head · open source
onedev vs Fizzy
onedev has 15,339 GitHub stars, 991 forks, 0 open issues and last shipped 2 days ago. Fizzy has 8,283 stars, 1,212 forks, 67 open issues and last shipped yesterday. onedev leads on adoption by 85% (15,339 vs 8,283 stars). onedev is written in Java under MIT; Fizzy is written in Ruby under a custom or non-standard licence. onedev has attracted 6% as many forks as stars, Fizzy 15%. Fizzy was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (kanban), 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
| onedev | Fizzy | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 8.3K |
| License | MIT | Custom / other |
| Written in | Java | Ruby |
| Last push | 2026-11-03 | 2026-11-04 |
| Forks | ⑂ 991 | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick onedev if
- You weight community size — 15K stars and counting
- You want the MIT license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick Fizzy if
- You want the Fizzy feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Ruby
- You evaluated both and Fizzy fits your workflow better
About onedev
NOTE: We develop OneDev at code.onedev.io for sake of dogfooding. Please submit issues and pull requests there The Unified and Autonomous Development Platform Get Started AI Teammates 🔎 Out of box code search and navigation Language aware symbol search and navigation in any commit. Click symbol to show occurrences in current file. Fast code search with regular expression. Try It 📦 Renovate integration to update project dependencies Integrate with Renovate to update project dependencies via pull requests. Merge pull requests automatically when approved by required reviewers, or pass required tests. Tutorial 🚦…
read the full onedev overview →
About Fizzy
Fizzy This is the source code of Fizzy, the Kanban tracking tool for issues and ideas by 37signals. Running your own Fizzy instance If you want to run your own Fizzy instance, but don't need to change its code, you can use our pre built Docker image. You'll need access to a server on which you can run Docker, and you'll need to configure some options to customize your installation. You can find the details of how to do a Docker based deployment in our Docker deployment guide. If you want more flexibility to customize your Fizzy installation by changing its code, and deploy those changes to your server, then we…
read the full Fizzy overview →
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Frequently asked questions
Is onedev or Fizzy more popular?
onedev has 15,339 GitHub stars and Fizzy has 8,283. onedev has the larger community by that measure.
Are onedev and Fizzy free?
Both are open source. onedev is licensed under MIT, and Fizzy has no licence declared in this registry. Both are free to self-host.
What is the difference between onedev and Fizzy?
onedev is written in Java and Fizzy in Ruby. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, onedev or Fizzy?
Choose onedev if you want the larger community (15,339 stars) or its MIT licence terms. Choose Fizzy if its feature set, stack or Custom / other licence fits better. Both are self-hostable.