head to head · open source
fastapi vs zenstack
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. zenstack has 2,957 stars, 159 forks, 182 open issues and last shipped 4 days ago. fastapi leads on adoption by 3,436% (104,566 vs 2,957 stars). fastapi is written in Python under MIT; zenstack is written in TypeScript under MIT. fastapi has attracted 10% as many forks as stars, zenstack 5%. fastapi was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (api, 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 | zenstack | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 3.0K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 10K | ⑂ 159 |
| 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 zenstack if
- You want the zenstack feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and zenstack 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 zenstack
Modern Data Layer for TypeScript Apps What's ZenStack Read full documentation at 👉🏻 ZenStack is a TypeScript database toolkit for developing full stack or backend Node.js/Bun applications. It provides a unified data modeling and query solution with the following features: 🔧 Modern schema first ORM that's compatible with Prisma's schema and API 📊 Versatile API high level ORM queries + low level Kysely query builder 🔐 Built in access control and data validation 🚀 Advanced data modeling patterns like polymorphism 🧩 Designed for extensibility and flexibility ⚙️ Automatic CRUD web APIs with adapters for…
read the full zenstack overview →
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Frequently asked questions
Is fastapi or zenstack more popular?
fastapi has 104,566 GitHub stars and zenstack has 2,957. fastapi has the larger community by that measure.
Are fastapi and zenstack free?
Both are open source. fastapi is licensed under MIT and zenstack under MIT. Neither carries a licence fee.
What is the difference between fastapi and zenstack?
fastapi is written in Python and zenstack 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 zenstack?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose zenstack if its feature set, stack or MIT licence fits better. Both are self-hostable.