head to head · open source
Yaak vs fusio
Yaak has 19,243 GitHub stars, 817 forks, 19 open issues and last shipped 3 days ago. fusio has 2,116 stars, 241 forks, 169 open issues and last shipped 15 days ago. Yaak leads on adoption by 809% (19,243 vs 2,116 stars). Yaak is written in TypeScript under MIT; fusio is written in PHP under Apache-2.0. Yaak has attracted 4% as many forks as stars, fusio 11%. Yaak 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
| Yaak | fusio | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 2.1K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | PHP |
| Last push | 2026-09-18 | 2026-09-06 |
| Forks | ⑂ 817 | ⑂ 241 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Yaak if
- You weight community size — 19K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick fusio if
- You want the fusio feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches PHP
- You evaluated both and fusio fits your workflow better
About Yaak
Yaak is a desktop API client for REST, GraphQL, gRPC, WebSocket, and Server Sent Events. It is built with Tauri, Rust, and React, and it lives in the developer tools ecosystem for API development and testing. The project presents itself as an offline first, privacy first alternative to Postman, Insomnia, and Bruno.
About fusio
Fusio is a self hosted, open source API management platform and gateway written in PHP that turns internal business logic, legacy databases, and microservices into documented API products for third party developers and autonomous AI agents.
read the full fusio overview →
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Frequently asked questions
Is Yaak or fusio more popular?
Yaak has 19,243 GitHub stars and fusio has 2,116. Yaak has the larger community by that measure.
Are Yaak and fusio free?
Both are open source. Yaak is licensed under MIT and fusio under Apache-2.0. Neither carries a licence fee.
What is the difference between Yaak and fusio?
Yaak is written in TypeScript and fusio in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Yaak or fusio?
Choose Yaak if you want the larger community (19,243 stars) or its MIT licence terms. Choose fusio if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.