Realtime & sync

Pusher Channels

A mature, managed Pub/Sub messaging service for adding real-time data streams to applications via WebSockets.

Overview

Pusher provides a simple API for broadcasting messages from server to client over WebSockets. It is one of the oldest and most reliable services in this space, with extensive SDKs for every major language and framework. It handles scaling, reconnections, and presence channels automatically. While less 'modern' in marketing, it remains a robust choice for straightforward real-time messaging needs.

Best for

Chat applications
Live notifications
Legacy app modernization

Trade-offs

vs Socket.io

Pusher is a managed service with less server maintenance; Socket.io is self-hosted and requires more infrastructure management.

What XeroHack pre-wires

When you pick Pusher Channels in the interview, the engine emits these files into your scaffold:

Pusher client JS init
Subscribe to channel
Bind to event

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