FastAPI: build Python APIs with Go-like speed and automatic UI docs
FastAPI framework, high performance, easy to learn, fast to code, ready for production
FastAPI: build Python APIs with Go-like speed and automatic UI docs launched on March 20, 2019 with 88 votes, #444 of 2,994 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 7 years on.
In plain words
FastAPI is a Python framework for building application programming interfaces with high performance comparable to Go-based solutions. It automatically generates interactive API documentation, reducing manual documentation work. The framework is designed for developers who need to create fast, modern APIs in Python. It launched in March 2019.
written from the facts on this page · September 2026
From the sources
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python based on standard Python type hints. * estimation based on tests conducted by an internal development team, building production applications. " [...] I'm using FastAPI a ton these days. [...] I'm actually planning to use it for all of my team's ML services at Microsoft . Some of them are getting integrated into the core Windows product and some Office products. " " We adopted the FastAPI library to spawn a REST server that can be queried to obtain predictions . [for Ludwig] " " Netflix is pleased to announce the open-source release of our crisis management orchestration framework: Dispatch ! [built…from fastapi.tiangolo.com
Does a similar job
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FastOpenAPI – automated docs for many Python frameworks2025 · github.com · ▲153FastOpenAPI is a library for generating and integrating OpenAPI schemas using Pydantic v2 and various frameworks (AioHttp, Django, Falcon, Flask, Quart, Sanic, Starlette, Tornado). - mr-fatalyst/fastopenapi
- TATypeAPI – An OpenAPI alternative optimized for code generation2023 · typeapi.org · ▲55
An OpenAPI alternative to describe REST APIs for type-safe code generation.
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