head to head · open source
fastapi vs mockserver-monorepo
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. mockserver-monorepo has 5,003 stars, 1,118 forks, 6 open issues and last shipped yesterday. fastapi leads on adoption by 1,990% (104,566 vs 5,003 stars). fastapi is written in Python under MIT; mockserver-monorepo is written in Java under Apache-2.0. fastapi has attracted 10% 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.
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
| fastapi | mockserver-monorepo | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 5.0K |
| License | MIT | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 10K | ⑂ 1.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 105K stars and counting
- You want the MIT license terms
- Your stack matches Python
- 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 fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production Documentation : Source Code : FastAPI is a modern, fast (high performance), web framework for building APIs with Python based on standard Python type hints. The key features are: Fast : Very high performance, on par with NodeJS and Go (thanks to Starlette and Pydantic). One of the fastest Python frameworks available. Fast to code : Increase the speed to develop features by about 200% to 300%. Fewer bugs : Reduce about 40% of human (developer) induced errors. Intuitive : Great editor support. Completion everywhere. Less time…
read the full fastapi overview →
About mockserver-monorepo
MockServer ===== MockServer is an HTTP(S) mock server and proxy for testing. It does three things: Mock the APIs your application depends on, so you can develop and test against systems that are unavailable, incomplete, or hard to reproduce. Proxy real traffic to record, inspect, and modify requests and responses in flight — and pause them at interactive proxy breakpoints to step through, edit, or abort each exchange like a debugger for network traffic. Chaos engineering — make dependencies misbehave on demand, injecting latency, dropped connections, and errors to test how your application copes when the systems…
read the full mockserver-monorepo overview →
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Frequently asked questions
Is fastapi or mockserver-monorepo more popular?
fastapi has 104,566 GitHub stars and mockserver-monorepo has 5,003. fastapi has the larger community by that measure.
Are fastapi and mockserver-monorepo free?
Both are open source. fastapi is licensed under MIT and mockserver-monorepo under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and mockserver-monorepo?
fastapi is written in Python 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, fastapi or mockserver-monorepo?
Choose fastapi if you want the larger community (104,566 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.