head to head · open source
fastapi vs runn
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. runn has 656 stars, 60 forks, 27 open issues and last shipped yesterday. fastapi leads on adoption by 15,840% (104,566 vs 656 stars). fastapi is written in Python under MIT; runn is written in Go under MIT. fastapi has attracted 10% as many forks as stars, runn 9%. 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 | runn | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 656 |
| License | MIT | MIT |
| Written in | Python | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 10K | ⑂ 60 |
| 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 runn if
- You want the runn feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and runn 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 runn
runn ( means "Run N". is pronounced /rʌ́n én/. ) is a package/tool for running operations following a scenario. Key features of runn are: As a tool for scenario based testing. As a test helper package for the Go language. As a tool for workflow automation. Support HTTP request, gRPC request, DB query, Chrome DevTools Protocol, and SSH/Local command execution OpenAPI Document like syntax for HTTP request testing. Single binary = CI Friendly. Online book runn Tutorial (Japanese) runn cookbook (Japanese) Quickstart You can use the runn new command to quickly start creating scenarios (runbooks). :rocket: Create and…
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Frequently asked questions
Is fastapi or runn more popular?
fastapi has 104,566 GitHub stars and runn has 656. fastapi has the larger community by that measure.
Are fastapi and runn free?
Both are open source. fastapi is licensed under MIT and runn under MIT. Neither carries a licence fee.
What is the difference between fastapi and runn?
fastapi is written in Python and runn 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, fastapi or runn?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose runn if its feature set, stack or MIT licence fits better. Both are self-hostable.