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Tornado

Python web framework and async networking library

A Python web framework and asynchronous networking library. Using non-blocking network I/O, Tornado can scale to tens of thousands of open connections.

22K
GitHub Stars
none
TypeScript
medium
Learning Curve
3.8
DX Score
Visit Website → Documentation GitHub

Pricing

Model
free
Free Tier
Apache 2.0 licensed, fully open source

Features

  • ✓ Non-blocking I/O
  • ✓ WebSocket support
  • ✓ Long polling
  • ✓ asyncio integration
  • ✓ OAuth support
  • ✓ Async/await patterns
  • ✓ Template engine
  • ✓ Secure cookies
  • ✓ XSRF protection

Pros

  • + Handles massive concurrency
  • + Great for real-time apps
  • + Mature and battle-tested
  • + Good performance
  • + asyncio compatible

Cons

  • - Not WSGI based
  • - Smaller ecosystem
  • - Less modern than FastAPI
  • - Callback style can be complex

Best For

startup enterprise

Alternatives

FastAPI FastAPI Sanic Sanic aiohttp aiohttp
backend async websockets realtime networking