Pusher
Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality to web and mobile apps.
Websocket
WebSocket is an API built on top of TCP sockets and a protocol for bi-directional, full-duplex communication between client and server without the overhead of HTTP.
Others
| Example |
|---|
|
The underlying websocket technology is bidirectional more info here but pusher s pub sub model is unidirectional from question Am I using websockets correctly? |