head to head · open source
fastapi vs chapar
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. chapar has 728 stars, 44 forks, 10 open issues and last shipped 5 days ago. fastapi leads on adoption by 14,263% (104,566 vs 728 stars). fastapi is written in Python under MIT; chapar is written in Go under BSD-3-Clause. fastapi has attracted 10% as many forks as stars, chapar 6%. fastapi 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
| fastapi | chapar | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 728 |
| License | MIT | BSD-3-Clause |
| Written in | Python | Go |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 10K | ⑂ 44 |
| 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 chapar if
- You want the chapar feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches Go
- You evaluated both and chapar 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 chapar
Chapar Native API Testing Tool Chapar is an upcoming native API testing tool built with GoLang, designed to simplify and expedite the testing process for developers. While still in its early beta phase, Chapar aims to offer a user friendly experience with support for both HTTP and gRPC protocols with. What Chapar means? Chapar was the institution of the royal mounted couriers in ancient Persia. The messengers, called Chapar, alternated in stations a day's ride apart along the Royal Road. The riders were exclusively in the service of the Great King and the network allowed for messages to be transported from Susa…
read the full chapar overview →
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Frequently asked questions
Is fastapi or chapar more popular?
fastapi has 104,566 GitHub stars and chapar has 728. fastapi has the larger community by that measure.
Are fastapi and chapar free?
Both are open source. fastapi is licensed under MIT and chapar under BSD-3-Clause. Neither carries a licence fee.
What is the difference between fastapi and chapar?
fastapi is written in Python and chapar 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 chapar?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose chapar if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.