head to head · open source
fastapi vs dev-proxy
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. dev-proxy has 838 stars, 90 forks, 36 open issues and last shipped yesterday. fastapi leads on adoption by 12,378% (104,566 vs 838 stars). fastapi is written in Python under MIT; dev-proxy is written in C# under MIT. fastapi has attracted 10% as many forks as stars, dev-proxy 11%. fastapi 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 | dev-proxy | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 838 |
| License | MIT | MIT |
| Written in | Python | C# |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 10K | ⑂ 90 |
| 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 dev-proxy if
- You want the dev-proxy feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and dev-proxy 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 dev-proxy
Dev Proxy Test the untestable Documentation What is Dev Proxy? Dev Proxy is an API simulator that helps you effortlessly test your app beyond the happy path. Dev Proxy is a command line tool that works on any platform. Because it intercepts network requests, it works with any type of app and tech stack. Dev Proxy is open source and free to use . You test your app to make sure it works as intended. But what if the APIs you use fail? Will your app lose your customer's data? How do you test for this? Simulating API failures is hard. You end up writing code that you won't be shipping or worse: not testing at all…
read the full dev-proxy overview →
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Frequently asked questions
Is fastapi or dev-proxy more popular?
fastapi has 104,566 GitHub stars and dev-proxy has 838. fastapi has the larger community by that measure.
Are fastapi and dev-proxy free?
Both are open source. fastapi is licensed under MIT and dev-proxy under MIT. Neither carries a licence fee.
What is the difference between fastapi and dev-proxy?
fastapi is written in Python and dev-proxy 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, fastapi or dev-proxy?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose dev-proxy if its feature set, stack or MIT licence fits better. Both are self-hostable.