head to head · open source
onedev vs Fizzy
onedev has 15,257 GitHub stars, 979 forks, 0 open issues and last shipped today. Fizzy has 8,212 stars, 1,194 forks, 67 open issues and last shipped yesterday. onedev leads on adoption by 86% (15,257 vs 8,212 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%. onedev 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 | ★ 8.2K |
| License | MIT | Custom / other |
| Written in | Java | Ruby |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 979 | ⑂ 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
OneDev is a self hosted, MIT licensed development platform written in Java that unifies Git hosting, code review, issue tracking, Kanban boards, service desk, time tracking, packages, and CI/CD in one system, aimed at teams that run the whole development lifecycle on their own infrastructure.
read the full onedev overview →
About Fizzy
Fizzy is an open source kanban tool for tracking issues and ideas, published by 37signals as a Ruby on Rails application, and it is aimed at teams that want a fast, simple board together with the source code and the option to run that board on their own server.
read the full Fizzy overview →
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Frequently asked questions
Is onedev or Fizzy more popular?
onedev has 15,257 GitHub stars and Fizzy has 8,212. 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 (15,257 stars) or its MIT licence terms. Choose Fizzy if its feature set, stack or Custom / other licence fits better. Both are self-hostable.