head to head · open source
fastapi vs openapi-typescript
fastapi has 102,402 GitHub stars, 9,903 forks, 78 open issues and last shipped 4 days ago. openapi-typescript has 8,369 stars, 665 forks, 300 open issues and last shipped 2 days ago. fastapi leads on adoption by 1,124% (102,402 vs 8,369 stars). fastapi is written in Python under MIT; openapi-typescript is written in TypeScript under MIT. fastapi has attracted 10% as many forks as stars, openapi-typescript 8%. openapi-typescript was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (openapi, openapi3), 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 | openapi-typescript | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 8.4K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-14 | 2026-09-16 |
| Forks | ⑂ 9.9K | ⑂ 665 |
| 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 openapi-typescript if
- You want the openapi-typescript feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and openapi-typescript 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 openapi-typescript
openapi typescript is a monorepo of tools for consuming OpenAPI schemas in TypeScript. It lives in the TypeScript developer tools ecosystem, sits under the Developer Tools / API Development & Testing category, ships under MIT license, and is eight years old. Repo holds 8,366 stars, 665 forks, and 300 open issues, with last push 2026 09 11T00:36:06Z. Topics tagged: openapi, openapi3, openapi3 1, swagger, typescript. Homepage at https://openapi ts.dev.
read the full openapi-typescript overview →
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Frequently asked questions
Is fastapi or openapi-typescript more popular?
fastapi has 102,402 GitHub stars and openapi-typescript has 8,369. fastapi has the larger community by that measure.
Are fastapi and openapi-typescript free?
Both are open source. fastapi is licensed under MIT and openapi-typescript under MIT. Neither carries a licence fee.
What is the difference between fastapi and openapi-typescript?
fastapi is written in Python and openapi-typescript 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 openapi-typescript?
Choose fastapi if you want the larger community (102,402 stars) or its MIT licence terms. Choose openapi-typescript if its feature set, stack or MIT licence fits better. Both are self-hostable.