head to head · open source
fastapi vs tailchat
fastapi has 104,382 GitHub stars, 10,180 forks, 78 open issues and last shipped 2 days ago. tailchat has 3,643 stars, 399 forks, 128 open issues and last shipped 1 months ago. fastapi leads on adoption by 2,765% (104,382 vs 3,643 stars). fastapi is written in Python under MIT; tailchat is written in TypeScript under Apache-2.0. fastapi has attracted 10% as many forks as stars, tailchat 11%. fastapi was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (openapi), 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 | tailchat | |
|---|---|---|
| GitHub stars | ★ 104K | ★ 3.6K |
| License | MIT | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-10-02 |
| Forks | ⑂ 10K | ⑂ 399 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 104K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick tailchat if
- You want the tailchat feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and tailchat 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 tailchat
Tailchat 简体中文 Next generation noIM application in your own workspace Not only another Slack , Discord , Rocket.Chat .... If you are interested in the concept of noIM , welcome to read my blog: It's time to officially step into the era of noIM Official Documentation: Nightly version Try it online: Nightly version is the automatic compile version, that means, every commit code will be automatically compiled. The reliability and stability of the data are not guaranteed, you can deploy with stable version with docker images or github release page Motivation At present, the existing IM applications only focus on…
read the full tailchat overview →
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Frequently asked questions
Is fastapi or tailchat more popular?
fastapi has 104,382 GitHub stars and tailchat has 3,643. fastapi has the larger community by that measure.
Are fastapi and tailchat free?
Both are open source. fastapi is licensed under MIT and tailchat under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and tailchat?
fastapi is written in Python and tailchat in TypeScript. 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 tailchat?
Choose fastapi if you want the larger community (104,382 stars) or its MIT licence terms. Choose tailchat if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.