head to head · open source
one-api vs mockserver-monorepo
one-api has 36,932 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. mockserver-monorepo has 4,972 stars, 1,116 forks, 6 open issues and last shipped yesterday. one-api leads on adoption by 643% (36,932 vs 4,972 stars). one-api is written in JavaScript under MIT; mockserver-monorepo is written in Java under Apache-2.0. one-api has attracted 19% as many forks as stars, mockserver-monorepo 22%. mockserver-monorepo was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (proxy), 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 | mockserver-monorepo | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 5.0K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Java |
| Last push | 2026-01-09 | 2026-09-17 |
| Forks | ⑂ 6.9K | ⑂ 1.1K |
| 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 mockserver-monorepo if
- You want the mockserver-monorepo feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and mockserver-monorepo 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 mockserver-monorepo
MockServer is an Apache 2.0 HTTP(S) mock server and proxy that lets teams mock the APIs their applications depend on, inspect and modify live traffic, and inject failures, and it is aimed at developers, QA engineers, and platform teams testing software built on the JVM.
read the full mockserver-monorepo overview →
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Frequently asked questions
Is one-api or mockserver-monorepo more popular?
one-api has 36,932 GitHub stars and mockserver-monorepo has 4,972. one-api has the larger community by that measure.
Are one-api and mockserver-monorepo free?
Both are open source. one-api is licensed under MIT and mockserver-monorepo under Apache-2.0. Neither carries a licence fee.
What is the difference between one-api and mockserver-monorepo?
one-api is written in JavaScript and mockserver-monorepo in Java. 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 mockserver-monorepo?
Choose one-api if you want the larger community (36,932 stars) or its MIT licence terms. Choose mockserver-monorepo if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.