head to head · open source
Fizzy vs itsaplan
Fizzy has 8,280 GitHub stars, 1,211 forks, 67 open issues and last shipped yesterday. itsaplan has 2,139 stars, 277 forks, 29 open issues and last shipped yesterday. Fizzy leads on adoption by 287% (8,280 vs 2,139 stars). Fizzy is written in Ruby under a custom or non-standard licence; itsaplan is written in TypeScript under AGPL-3.0. Fizzy has attracted 15% as many forks as stars, itsaplan 13%. 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
| Fizzy | itsaplan | |
|---|---|---|
| GitHub stars | ★ 8.3K | ★ 2.1K |
| License | Custom / other | AGPL-3.0 |
| Written in | Ruby | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.2K | ⑂ 277 |
| 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 itsaplan if
- You want the itsaplan feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and itsaplan 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 itsaplan
Open source alternative to Linear, Jira, Trello, and Plane, with AI agents built in Self hosted project management and issue tracking. The difference: AI agents work here like any teammate — and everything is available over the REST API, webhooks, and MCP. If It's a Plan looks useful to you, star the repo ⭐ — it helps other people find it. Website · Discussions · Contributing · Security · Leave a review About It's a Plan is a full issue tracker on its own: projects, boards, cycles, custom fields, and dashboards. Use it that way and never turn on a single agent. The difference: AI agents work here like any…
read the full itsaplan overview →
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Frequently asked questions
Is Fizzy or itsaplan more popular?
Fizzy has 8,280 GitHub stars and itsaplan has 2,139. Fizzy has the larger community by that measure.
Are Fizzy and itsaplan free?
Both are open source. Fizzy has no licence declared in this registry, and itsaplan is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Fizzy and itsaplan?
Fizzy is written in Ruby and itsaplan in TypeScript. 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 itsaplan?
Choose Fizzy if you want the larger community (8,280 stars) or its Custom / other licence terms. Choose itsaplan if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.