head to head · open source
one-api vs concord
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. concord has 651 stars, 42 forks, 18 open issues and last shipped 1 months ago. one-api leads on adoption by 5,574% (36,940 vs 651 stars). one-api is written in JavaScript under MIT; concord is written in C under MIT. one-api has attracted 19% as many forks as stars, concord 6%. concord 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 | concord | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 651 |
| License | MIT | MIT |
| Written in | JavaScript | C |
| Last push | 2026-01-09 | 2026-08-11 |
| Forks | ⑂ 6.9K | ⑂ 42 |
| 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 concord if
- You want the concord feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C
- You evaluated both and concord 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 concord
[migrating shield]: [migrating link]: [migrating orca link]: [discord shield]: [discord invite]: [discord config init]: [discord config get field]: Concord C Discord API library [ ![discord shield][] ][discord invite] [ ![migrating shield][] ][migrating link] 🚨 Concord is not dead! 🚨 Development has been happening in the dev branch. We are working on new features and improvements. To access the latest version of the library, please check out the dev branch. About Concord is an asynchronous C99 Discord API library with minimal external dependencies, and a low level translation of the Discord official documentati…
read the full concord overview →
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Frequently asked questions
Is one-api or concord more popular?
one-api has 36,940 GitHub stars and concord has 651. one-api has the larger community by that measure.
Are one-api and concord free?
Both are open source. one-api is licensed under MIT and concord under MIT. Neither carries a licence fee.
What is the difference between one-api and concord?
one-api is written in JavaScript and concord in C. 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 concord?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose concord if its feature set, stack or MIT licence fits better. Both are self-hostable.