| Feature | WSGI | ASGI |
|---|---|---|
| Request Handling | Synchronous (Blocking) | Asynchronous (Non-blocking) |
| WebSockets Support | No | Yes |
| Best for | REST APIs, Web Apps | Real-time Apps, WebSockets |
| Used in | Flask, Django, Pyramid | FastAPI, Django (ASGI mode), Starlette |
As their name suggests, WSGI is great for traditional web apps, while ASGI is better for async applications.