head to head · open source
one-api vs ogen
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. ogen has 2,139 stars, 185 forks, 133 open issues and last shipped 5 days ago. one-api leads on adoption by 1,627% (36,940 vs 2,139 stars). one-api is written in JavaScript under MIT; ogen is written in Go under Apache-2.0. one-api has attracted 19% as many forks as stars, ogen 9%. ogen 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 | ogen | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 2.1K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Go |
| Last push | 2026-01-09 | 2026-09-14 |
| Forks | ⑂ 6.9K | ⑂ 185 |
| 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 ogen if
- You want the ogen feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and ogen 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 ogen
ogen is an Apache 2.0 licensed OpenAPI v3 code generator for Go that converts an OpenAPI v3 specification into statically typed Go server interfaces and client code, aimed at Go teams who would rather generate their HTTP API layer from a spec than hand write it.
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Frequently asked questions
Is one-api or ogen more popular?
one-api has 36,940 GitHub stars and ogen has 2,139. one-api has the larger community by that measure.
Are one-api and ogen free?
Both are open source. one-api is licensed under MIT and ogen under Apache-2.0. Neither carries a licence fee.
What is the difference between one-api and ogen?
one-api is written in JavaScript and ogen in Go. 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 ogen?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose ogen if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.