miguelgrinberg/Flask-SocketIO

Health v2 · maintenance only

Adoption not part of the score

5509 stars · 902 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A Python library that adds Socket.IO (WebSocket with fallbacks) support to Flask applications, enabling bidirectional real-time event-based communication between server and clients. It integrates with Flask's routing and session handling and supports multiple async workers like gevent and eventlet.

Use cases

• add real-time chat to a flask app
• push live updates to browsers over websockets
• build a flask app with socket.io events
• stream live notifications from server to clients
• implement bidirectional messaging in python web app
• add websocket support to existing flask project

When to choose

• you already use Flask and need real-time bidirectional communication
• you want Socket.IO features like rooms, namespaces, and automatic fallback transports
• you need a mature, well-documented Python Socket.IO server

When to avoid

• you need raw WebSocket control without the Socket.IO protocol
• your app is not built on Flask
• you want a framework-agnostic async solution like python-socketio with FastAPI

Facets

library · maturity stable

websocket web-framework http-server web-development backend python flask socketio real-time event-driven long-polling web-server

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