head to head · open source
Windmill vs mitosis
Windmill has 17,957 GitHub stars, 1,096 forks, 852 open issues and last shipped yesterday. mitosis has 14,390 stars, 672 forks, 176 open issues and last shipped 2 months ago. Windmill leads on adoption by 25% (17,957 vs 14,390 stars). Windmill is written in Rust under a custom or non-standard licence; mitosis is written in TypeScript under MIT. Windmill has attracted 6% as many forks as stars, mitosis 5%. Windmill 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
| Windmill | mitosis | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 14K |
| License | Custom / other | MIT |
| Written in | Rust | TypeScript |
| Last push | 2026-09-17 | 2026-07-21 |
| Forks | ⑂ 1.1K | ⑂ 672 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Windmill if
- You weight community size — 18K stars and counting
- You want the Custom / other license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick mitosis if
- You want the mitosis feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and mitosis fits your workflow better
About Windmill
Windmill is an open source developer platform for internal code, including APIs, background jobs, workflows, and UIs. It lives in the self hostable low code automation ecosystem and supports Python, TypeScript, Go, Bash, SQL, GraphQL, PowerShell, Rust, and more. The project is positioned as an open source alternative to Zapier and, in the README, to Retool, Pipedream, Superblocks, and a simplified Temporal.
read the full Windmill overview →
About mitosis
Mitosis is an open source compiler that lets developers write UI components once in a single codebase and compile them to React, Vue, Angular, Svelte, Solid, Alpine, Qwik, and more. It is a TypeScript project under the MIT license, maintained in the BuilderIO organization, with the repository carrying roughly 14,384 stars and 671 forks across six years of history. The project lives in the JavaScript and TypeScript component ecosystem, and its documentation, playground, and Figma integration are hosted at mitosis.builder.io.
read the full mitosis overview →
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Frequently asked questions
Is Windmill or mitosis more popular?
Windmill has 17,957 GitHub stars and mitosis has 14,390. Windmill has the larger community by that measure.
Are Windmill and mitosis free?
Both are open source. Windmill has no licence declared in this registry, and mitosis is licensed under MIT. Both are free to self-host.
What is the difference between Windmill and mitosis?
Windmill is written in Rust and mitosis 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, Windmill or mitosis?
Choose Windmill if you want the larger community (17,957 stars) or its Custom / other licence terms. Choose mitosis if its feature set, stack or MIT licence fits better. Both are self-hostable.