head to head · open source
one-api vs just-api
one-api has 36,932 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. just-api has 814 stars, 36 forks, 19 open issues and last shipped 7 months ago. one-api leads on adoption by 4,437% (36,932 vs 814 stars). one-api is written in JavaScript under MIT; just-api is written in JavaScript under MIT. one-api has attracted 19% as many forks as stars, just-api 4%. just-api 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 | just-api | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 814 |
| License | MIT | MIT |
| Written in | JavaScript | JavaScript |
| Last push | 2026-01-09 | 2026-02-12 |
| Forks | ⑂ 6.9K | ⑂ 36 |
| 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 just-api if
- You want the just-api feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and just-api 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 just-api
Just API is a declarative, specification based test framework for REST and GraphQL APIs, written in JavaScript and distributed under the MIT license. It lives in the Node.js ecosystem and runs from the npm package just api . Instead of writing test code, a user describes a request and the response validation rules in a YAML file, and the framework builds the request, sends it to the server, and checks the response against that specification. Each suite can contain one or more specs, and suites run in serial or parallel mode.
read the full just-api overview →
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Frequently asked questions
Is one-api or just-api more popular?
one-api has 36,932 GitHub stars and just-api has 814. one-api has the larger community by that measure.
Are one-api and just-api free?
Both are open source. one-api is licensed under MIT and just-api under MIT. Neither carries a licence fee.
What is the difference between one-api and just-api?
one-api is written in JavaScript and just-api in JavaScript. 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 just-api?
Choose one-api if you want the larger community (36,932 stars) or its MIT licence terms. Choose just-api if its feature set, stack or MIT licence fits better. Both are self-hostable.