head to head · open source
fastapi vs kubb
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. kubb has 1,836 stars, 150 forks, 6 open issues and last shipped yesterday. fastapi leads on adoption by 5,595% (104,566 vs 1,836 stars). fastapi is written in Python under MIT; kubb is written in TypeScript under MIT. fastapi has attracted 10% as many forks as stars, kubb 8%. fastapi was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (openapi), 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
| fastapi | kubb | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 1.8K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 10K | ⑂ 150 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 105K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick kubb if
- You want the kubb feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and kubb fits your workflow better
About fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production Documentation : Source Code : FastAPI is a modern, fast (high performance), web framework for building APIs with Python based on standard Python type hints. The key features are: Fast : Very high performance, on par with NodeJS and Go (thanks to Starlette and Pydantic). One of the fastest Python frameworks available. Fast to code : Increase the speed to develop features by about 200% to 300%. Fewer bugs : Reduce about 40% of human (developer) induced errors. Intuitive : Great editor support. Completion everywhere. Less time…
read the full fastapi overview →
About kubb
[![npm version][npm version src]][npm version href] [![npm downloads][npm downloads src]][npm downloads href] [![Stars][stars src]][stars href] [![License][license src]][license href] [![Coverage][coverage src]][coverage href] [![Node][node src]][node href] [![OC Backers][oc backers src]][oc backers href] Documentation · Report Bug · Request Feature Kubb The meta framework for code generation Point Kubb at a schema and it generates types, clients, hooks, validators, mocks, and more. Installation Quick start Run the setup wizard to create a kubb.config.ts : The wizard creates a package.json if needed, guides you…
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Frequently asked questions
Is fastapi or kubb more popular?
fastapi has 104,566 GitHub stars and kubb has 1,836. fastapi has the larger community by that measure.
Are fastapi and kubb free?
Both are open source. fastapi is licensed under MIT and kubb under MIT. Neither carries a licence fee.
What is the difference between fastapi and kubb?
fastapi is written in Python and kubb 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 kubb?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose kubb if its feature set, stack or MIT licence fits better. Both are self-hostable.