head to head · open source
one-api vs portman
one-api has 36,932 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. portman has 685 stars, 62 forks, 56 open issues and last shipped 9 days ago. one-api leads on adoption by 5,292% (36,932 vs 685 stars). one-api is written in JavaScript under MIT; portman is written in TypeScript under Apache-2.0. one-api has attracted 19% as many forks as stars, portman 9%. portman was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (api), 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
| one-api | portman | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 685 |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-01-09 | 2026-09-09 |
| Forks | ⑂ 6.9K | ⑂ 62 |
| 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 portman if
- You want the portman 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 portman 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 portman
Portman is a TypeScript command line tool that ports an OpenAPI document into a Postman collection. It reads the request and response properties defined in an OpenAPI specification and uses them to build the collection, then injects contract and variation tests into the generated requests with a minimum of configuration. The project lives in the API development and testing ecosystem, bridging the contract first OpenAPI world and the Postman collection format. It is published under the Apache 2.0 license, carries 685 stars and 62 forks, and its repository is five years old with 56 open issues.
read the full portman overview →
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Frequently asked questions
Is one-api or portman more popular?
one-api has 36,932 GitHub stars and portman has 685. one-api has the larger community by that measure.
Are one-api and portman free?
Both are open source. one-api is licensed under MIT and portman under Apache-2.0. Neither carries a licence fee.
What is the difference between one-api and portman?
one-api is written in JavaScript and portman 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 portman?
Choose one-api if you want the larger community (36,932 stars) or its MIT licence terms. Choose portman if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.