head to head · open source
Fizzy vs nimbalyst
Fizzy has 8,212 GitHub stars, 1,194 forks, 67 open issues and last shipped 2 days ago. nimbalyst has 1,751 stars, 254 forks, 642 open issues and last shipped 3 days ago. Fizzy leads on adoption by 369% (8,212 vs 1,751 stars). Fizzy is written in Ruby under a custom or non-standard licence; nimbalyst is written in TypeScript under MIT. Fizzy has attracted 15% as many forks as stars, nimbalyst 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.
← all 20902 open source comparisons
Side by side
| Fizzy | nimbalyst | |
|---|---|---|
| GitHub stars | ★ 8.2K | ★ 1.8K |
| License | Custom / other | MIT |
| Written in | Ruby | TypeScript |
| Last push | 2026-09-19 | 2026-09-18 |
| Forks | ⑂ 1.2K | ⑂ 254 |
| 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 nimbalyst if
- You want the nimbalyst feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and nimbalyst 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 nimbalyst
Nimbalyst is an open source visual workspace for Claude Code, Codex, OpenCode, and other coding agents. It lives in the agentic coding ecosystem and brings sessions, worktrees, tasks, docs, diagrams, mockups, commits, and code into one desktop application. It is written in TypeScript, uses Electron, and is MIT licensed.
read the full nimbalyst overview →
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 nimbalyst more popular?
Fizzy has 8,212 GitHub stars and nimbalyst has 1,751. Fizzy has the larger community by that measure.
Are Fizzy and nimbalyst free?
Both are open source. Fizzy has no licence declared in this registry, and nimbalyst is licensed under MIT. Both are free to self-host.
What is the difference between Fizzy and nimbalyst?
Fizzy is written in Ruby and nimbalyst 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 nimbalyst?
Choose Fizzy if you want the larger community (8,212 stars) or its Custom / other licence terms. Choose nimbalyst if its feature set, stack or MIT licence fits better. Both are self-hostable.