head to head · open source
Fizzy vs KaibanJS
Fizzy has 8,283 GitHub stars, 1,212 forks, 67 open issues and last shipped yesterday. KaibanJS has 1,486 stars, 159 forks, 78 open issues and last shipped 6 months ago. Fizzy leads on adoption by 457% (8,283 vs 1,486 stars). Fizzy is written in Ruby under a custom or non-standard licence; KaibanJS is written in TypeScript under MIT. Fizzy has attracted 15% as many forks as stars, KaibanJS 11%. 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 | KaibanJS | |
|---|---|---|
| GitHub stars | ★ 8.3K | ★ 1.5K |
| License | Custom / other | MIT |
| Written in | Ruby | TypeScript |
| Last push | 2026-11-04 | 2026-05-15 |
| Forks | ⑂ 1.2K | ⑂ 159 |
| 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 KaibanJS if
- You want the KaibanJS feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and KaibanJS 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 KaibanJS
KaibanJS The JavaScript Framework for Building Multi agent Systems. Kanban for AI Agents? 🤖📋 KaibanJS is inspired by the tried and true Kanban methodology, which is well known for helping teams organize and manage their work. We've adapted these concepts to meet the unique challenges of AI agent management . If you've used tools like Trello, Jira, or ClickUp, you'll be familiar with how Kanban helps manage tasks. Now, KaibanJS uses that same system to help you manage AI agents and their tasks in real time. With KaibanJS, you can: 🔨 Create, visualize, and manage AI agents, tasks, tools, and teams 🎯…
read the full KaibanJS overview →
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Frequently asked questions
Is Fizzy or KaibanJS more popular?
Fizzy has 8,283 GitHub stars and KaibanJS has 1,486. Fizzy has the larger community by that measure.
Are Fizzy and KaibanJS free?
Both are open source. Fizzy has no licence declared in this registry, and KaibanJS is licensed under MIT. Both are free to self-host.
What is the difference between Fizzy and KaibanJS?
Fizzy is written in Ruby and KaibanJS 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 KaibanJS?
Choose Fizzy if you want the larger community (8,283 stars) or its Custom / other licence terms. Choose KaibanJS if its feature set, stack or MIT licence fits better. Both are self-hostable.