AnyIO
Async networking and concurrency library that runs on top of asyncio or Trio — provides Trio-style structured concurrency primitives with broad compatibility.
async-runtime-frameworksNew to PyRadar
76
Hero Score
Popularity
76
Performance
85
Ecosystem
75
Maturity
77
Dev Experience
68
⭐ 2,475 stars⬇ 183.1M downloads/wkFirst release: May 2019Last release: Mar 2026
Async Support: YesPlugin Extensions: HighSpeed: FastDoc Quality: HighLearning Curve: Medium
Pros
- • Structured concurrency primitives that run on either asyncio or Trio
- • Task groups and cancellation scopes for safer async code
- • Used internally by FastAPI, Starlette, and Httpx — huge transitive adoption
Cons
- • Thin abstraction layer that still requires understanding both backends
- • Smaller standalone community than asyncio
- • Debugging across asyncio and Trio backends can be tricky