head to head · open source
one-api vs openapi-typescript-codegen
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. openapi-typescript-codegen has 3,369 stars, 546 forks, 213 open issues and last shipped 6 days ago. one-api leads on adoption by 996% (36,940 vs 3,369 stars). one-api is written in JavaScript under MIT; openapi-typescript-codegen is written in TypeScript under MIT. one-api has attracted 19% as many forks as stars, openapi-typescript-codegen 16%. openapi-typescript-codegen 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
| one-api | openapi-typescript-codegen | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 3.4K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-01-09 | 2026-09-12 |
| Forks | ⑂ 6.9K | ⑂ 546 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick one-api if
- You weight community size — 37K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick openapi-typescript-codegen if
- You want the openapi-typescript-codegen 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-codegen fits your workflow better
About one-api
One API is a self hosted LLM API management and key redistribution system that exposes many model providers through the standard OpenAI API format, aimed at developers, teams and operators who want a single endpoint, a single key model and a single quota surface across providers.
read the full one-api overview →
About openapi-typescript-codegen
Important announcement [!IMPORTANT] Please migrate your projects to use @hey api/openapi ts Due to time limitations on my end, this project has been unmaintained for a while now. The @hey api/openapi ts project started as a fork with the goal to resolve the most pressing issues. going forward they are planning to maintain the OpenAPI generator and give it the love it deserves. Please support them with their work and make sure to migrate your projects: All open PR's and issues will be archived on the 1st of May 2024 All versions of this package will be deprecated in NPM 👋 Thanks for all the support, downloads and…
read the full openapi-typescript-codegen overview →
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Frequently asked questions
Is one-api or openapi-typescript-codegen more popular?
one-api has 36,940 GitHub stars and openapi-typescript-codegen has 3,369. one-api has the larger community by that measure.
Are one-api and openapi-typescript-codegen free?
Both are open source. one-api is licensed under MIT and openapi-typescript-codegen under MIT. Neither carries a licence fee.
What is the difference between one-api and openapi-typescript-codegen?
one-api is written in JavaScript and openapi-typescript-codegen 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, one-api or openapi-typescript-codegen?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose openapi-typescript-codegen if its feature set, stack or MIT licence fits better. Both are self-hostable.