head to head · open source
fastapi vs optillm
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. optillm has 4,335 stars, 398 forks, 23 open issues and last shipped yesterday. fastapi leads on adoption by 2,312% (104,566 vs 4,335 stars). fastapi is written in Python under MIT; optillm is written in Python under Apache-2.0. fastapi has attracted 10% as many forks as stars, optillm 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 | optillm | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 4.3K |
| License | MIT | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 10K | ⑂ 398 |
| 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 optillm if
- You want the optillm feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and optillm 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 optillm
OptiLLM 🚀 2 10x accuracy improvements on reasoning tasks with zero training 🤗 HuggingFace Space • 📓 Colab Demo • 💬 Discussions OptiLLM is an OpenAI API compatible optimizing inference proxy that implements 20+ state of the art techniques to dramatically improve LLM accuracy and performance on reasoning tasks without requiring any model training or fine tuning. It is possible to beat the frontier models using these techniques across diverse tasks by doing additional compute at inference time. A good example of how to combine such techniques together is the CePO approach from Cerebras. ✨ Key Features 🎯…
read the full optillm overview →
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Frequently asked questions
Is fastapi or optillm more popular?
fastapi has 104,566 GitHub stars and optillm has 4,335. fastapi has the larger community by that measure.
Are fastapi and optillm free?
Both are open source. fastapi is licensed under MIT and optillm under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and optillm?
fastapi is written in Python and optillm in Python. 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 optillm?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose optillm if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.