head to head · open source
Fizzy vs paca
Fizzy has 8,212 GitHub stars, 1,194 forks, 67 open issues and last shipped 2 days ago. paca has 1,836 stars, 154 forks, 8 open issues and last shipped 3 days ago. Fizzy leads on adoption by 347% (8,212 vs 1,836 stars). Fizzy is written in Ruby under a custom or non-standard licence; paca is written in Go under Apache-2.0. Fizzy has attracted 15% as many forks as stars, paca 8%. Fizzy 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.
← all 20902 open source comparisons
Side by side
| Fizzy | paca | |
|---|---|---|
| GitHub stars | ★ 8.2K | ★ 1.8K |
| License | Custom / other | Apache-2.0 |
| Written in | Ruby | Go |
| Last push | 2026-09-19 | 2026-09-18 |
| Forks | ⑂ 1.2K | ⑂ 154 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Fizzy if
- You weight community size — 8.2K stars and counting
- You want the Custom / other license terms
- Your stack matches Ruby
- You value the larger contributor base for long-term maintenance
pick paca if
- You want the paca 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 paca fits your workflow better
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 →
About paca
Paca is a free, open source, self hosted, AI native project management platform in which human Scrum teams and AI agents work as equal teammates on the same board, the same sprints, and the same goals.
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 Fizzy or paca more popular?
Fizzy has 8,212 GitHub stars and paca has 1,836. Fizzy has the larger community by that measure.
Are Fizzy and paca free?
Both are open source. Fizzy has no licence declared in this registry, and paca is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Fizzy and paca?
Fizzy is written in Ruby and paca 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, Fizzy or paca?
Choose Fizzy if you want the larger community (8,212 stars) or its Custom / other licence terms. Choose paca if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.