head to head · open source
vibe-kanban vs Fizzy
vibe-kanban has 28,135 GitHub stars, 3,013 forks, 540 open issues and last shipped yesterday. Fizzy has 8,212 stars, 1,194 forks, 67 open issues and last shipped yesterday. vibe-kanban leads on adoption by 243% (28,135 vs 8,212 stars). vibe-kanban is written in Rust under Apache-2.0; Fizzy is written in Ruby under a custom or non-standard licence. vibe-kanban has attracted 11% as many forks as stars, Fizzy 15%. vibe-kanban 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.
← all 20902 open source comparisons
Side by side
| vibe-kanban | Fizzy | |
|---|---|---|
| GitHub stars | ★ 28K | ★ 8.2K |
| License | Apache-2.0 | Custom / other |
| Written in | Rust | Ruby |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 3.0K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick vibe-kanban if
- You weight community size — 28K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- 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 vibe-kanban
Vibe Kanban is an open source, Apache 2.0 kanban board written in Rust that lets software engineers plan work as issues and hand each issue to a coding agent such as Claude Code, Codex, Gemini CLI or Amp inside an isolated workspace.
read the full vibe-kanban 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 →
More in Business Software
Related comparisons
More Project & Work Management projects
Compare either of these against the rest of the Project & Work Management field.
Frequently asked questions
Is vibe-kanban or Fizzy more popular?
vibe-kanban has 28,135 GitHub stars and Fizzy has 8,212. vibe-kanban has the larger community by that measure.
Are vibe-kanban and Fizzy free?
Both are open source. vibe-kanban is licensed under Apache-2.0, and Fizzy has no licence declared in this registry. Both are free to self-host.
What is the difference between vibe-kanban and Fizzy?
vibe-kanban is written in Rust 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, vibe-kanban or Fizzy?
Choose vibe-kanban if you want the larger community (28,135 stars) or its Apache-2.0 licence terms. Choose Fizzy if its feature set, stack or Custom / other licence fits better. Both are self-hostable.