head to head · open source
one-api vs openapi-generator-cli
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. openapi-generator-cli has 1,977 stars, 208 forks, 71 open issues and last shipped 3 days ago. one-api leads on adoption by 1,768% (36,940 vs 1,977 stars). one-api is written in JavaScript under MIT; openapi-generator-cli is written in TypeScript under Apache-2.0. one-api has attracted 19% as many forks as stars, openapi-generator-cli 11%. openapi-generator-cli 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-generator-cli | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 2.0K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-01-09 | 2026-09-16 |
| Forks | ⑂ 6.9K | ⑂ 208 |
| 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-generator-cli if
- You want the openapi-generator-cli feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and openapi-generator-cli 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-generator-cli
@openapitools/openapi generator cli is a Node package that wraps the Java based OpenAPI Generator, letting JavaScript and TypeScript developers generate API client libraries, server stubs, and documentation from OpenAPI 2.0 and 3.0 specifications without invoking the upstream Java toolchain by hand.
read the full openapi-generator-cli overview →
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Frequently asked questions
Is one-api or openapi-generator-cli more popular?
one-api has 36,940 GitHub stars and openapi-generator-cli has 1,977. one-api has the larger community by that measure.
Are one-api and openapi-generator-cli free?
Both are open source. one-api is licensed under MIT and openapi-generator-cli under Apache-2.0. Neither carries a licence fee.
What is the difference between one-api and openapi-generator-cli?
one-api is written in JavaScript and openapi-generator-cli 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-generator-cli?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose openapi-generator-cli if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.