head to head · open source
one-api vs pythagora
one-api has 36,932 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. pythagora has 1,823 stars, 116 forks, 24 open issues and last shipped 3 months ago. one-api leads on adoption by 1,926% (36,932 vs 1,823 stars). one-api is written in JavaScript under MIT; pythagora is written in JavaScript under Apache-2.0. one-api has attracted 19% as many forks as stars, pythagora 6%. pythagora 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 | pythagora | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 1.8K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-01-09 | 2026-06-16 |
| Forks | ⑂ 6.9K | ⑂ 116 |
| 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 pythagora if
- You want the pythagora feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and pythagora 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 pythagora
Pythagora is a JavaScript tool for generating automated tests for Node.js applications with GPT 4. It lives in the Node.js testing ecosystem and aims to create unit tests without developers writing the test code by hand. The project works by finding an exported function, collecting related functions through AST parsing, and sending that context to a server that produces the tests. The README also says the repository is deprecated and that work has moved to GPT Pilot.
read the full pythagora overview →
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Frequently asked questions
Is one-api or pythagora more popular?
one-api has 36,932 GitHub stars and pythagora has 1,823. one-api has the larger community by that measure.
Are one-api and pythagora free?
Both are open source. one-api is licensed under MIT and pythagora under Apache-2.0. Neither carries a licence fee.
What is the difference between one-api and pythagora?
one-api is written in JavaScript and pythagora 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 pythagora?
Choose one-api if you want the larger community (36,932 stars) or its MIT licence terms. Choose pythagora if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.