head to head · open source
Leantime vs Fizzy
Leantime has 11,612 GitHub stars, 1,131 forks, 328 open issues and last shipped 13 days ago. Fizzy has 8,212 stars, 1,194 forks, 67 open issues and last shipped yesterday. Leantime leads on adoption by 41% (11,612 vs 8,212 stars). Leantime is written in PHP under AGPL-3.0; Fizzy is written in Ruby under a custom or non-standard licence. Leantime has attracted 10% 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
| Leantime | Fizzy | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 8.2K |
| License | AGPL-3.0 | Custom / other |
| Written in | PHP | Ruby |
| Last push | 2026-09-07 | 2026-09-19 |
| Forks | ⑂ 1.1K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Leantime if
- You weight community size — 12K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches PHP
- 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 Leantime
Leantime is an open source project management system in the Business Software / Project & Work Management category, written in PHP and licensed under AGPL 3.0. It is aimed at non project managers and combines strategy, planning, and execution in one place. The project describes itself as built with ADHD, autism, and dyslexia in mind.
read the full Leantime 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 Leantime or Fizzy more popular?
Leantime has 11,612 GitHub stars and Fizzy has 8,212. Leantime has the larger community by that measure.
Are Leantime and Fizzy free?
Both are open source. Leantime is licensed under AGPL-3.0, and Fizzy has no licence declared in this registry. Both are free to self-host.
What is the difference between Leantime and Fizzy?
Leantime is written in PHP 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, Leantime or Fizzy?
Choose Leantime if you want the larger community (11,612 stars) or its AGPL-3.0 licence terms. Choose Fizzy if its feature set, stack or Custom / other licence fits better. Both are self-hostable.