head to head · open source
Fizzy vs treesheets
Fizzy has 8,270 GitHub stars, 1,208 forks, 67 open issues and last shipped yesterday. treesheets has 3,170 stars, 224 forks, 54 open issues and last shipped 2 days ago. Fizzy leads on adoption by 161% (8,270 vs 3,170 stars). Fizzy is written in Ruby under a custom or non-standard licence; treesheets is written in C++ under Zlib. Fizzy has attracted 15% as many forks as stars, treesheets 7%. 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.
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Side by side
| Fizzy | treesheets | |
|---|---|---|
| GitHub stars | ★ 8.3K | ★ 3.2K |
| License | Custom / other | Zlib |
| Written in | Ruby | C++ |
| Last push | 2026-10-25 | 2026-10-24 |
| Forks | ⑂ 1.2K | ⑂ 224 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Fizzy if
- You weight community size — 8.3K 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 treesheets if
- You want the treesheets feature set and don't need the biggest community
- You prefer the Zlib license terms
- Your stack matches C++
- You evaluated both and treesheets fits your workflow better
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 →
About treesheets
Welcome to the TreeSheets productivity tool! ============================================ TreeSheets is a "hierarchical spreadsheet" that is a great replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases. Suitable for any kind of data organization, such as todo lists, calendars, project management, brainstorming, organizing ideas, planning, requirements gathering, presentation of information, etc. It's like a spreadsheet, immediately familiar, but much more suitable for complex data because it's hierarchical. It's like a mind mapper, but more organized and compact. It's…
read the full treesheets overview →
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Frequently asked questions
Is Fizzy or treesheets more popular?
Fizzy has 8,270 GitHub stars and treesheets has 3,170. Fizzy has the larger community by that measure.
Are Fizzy and treesheets free?
Both are open source. Fizzy has no licence declared in this registry, and treesheets is licensed under Zlib. Both are free to self-host.
What is the difference between Fizzy and treesheets?
Fizzy is written in Ruby and treesheets in C++. 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 treesheets?
Choose Fizzy if you want the larger community (8,270 stars) or its Custom / other licence terms. Choose treesheets if its feature set, stack or Zlib licence fits better. Both are self-hostable.