head to head · open source
fastapi vs Yaak
fastapi has 102,402 GitHub stars, 9,903 forks, 78 open issues and last shipped 4 days ago. Yaak has 19,224 stars, 813 forks, 19 open issues and last shipped yesterday. fastapi leads on adoption by 433% (102,402 vs 19,224 stars). fastapi is written in Python under MIT; Yaak is written in TypeScript under MIT. fastapi has attracted 10% as many forks as stars, Yaak 4%. 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
| fastapi | Yaak | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 19K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-14 | 2026-09-17 |
| Forks | ⑂ 9.9K | ⑂ 813 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 102K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Yaak if
- You want the Yaak feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Yaak fits your workflow better
About fastapi
FastAPI is an MIT licensed, high performance Python web framework for building APIs with standard Python type hints, aimed at Python developers and teams that need production ready HTTP services with automatic OpenAPI documentation.
read the full fastapi overview →
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.
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Frequently asked questions
Is fastapi or Yaak more popular?
fastapi has 102,402 GitHub stars and Yaak has 19,224. fastapi has the larger community by that measure.
Are fastapi and Yaak free?
Both are open source. fastapi is licensed under MIT and Yaak under MIT. Neither carries a licence fee.
What is the difference between fastapi and Yaak?
fastapi is written in Python and Yaak 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, fastapi or Yaak?
Choose fastapi if you want the larger community (102,402 stars) or its MIT licence terms. Choose Yaak if its feature set, stack or MIT licence fits better. Both are self-hostable.