Pusher
Managed WebSocket infrastructure as a service. Drop in real-time features (presence, channels, notifications) without managing your own WebSocket servers.
Why Pusher?
You want real-time without managing WebSocket infra
Building presence features (who's online) or live collaboration
You need a free tier to prototype quickly
Signal Breakdown
What drives the Trust Score
Download Trend
Last 12 months
Tradeoffs & Caveats
Know before you commitHigh message volume — costs escalate quickly
You prefer self-hosted open source (use Socket.io)
Edge/serverless deployment — latency from managed service
Pricing
Free tier & paid plans
100 max connections · 200k messages/day
From $49/mo
Sandbox plan free forever
Alternative Tools
Other options worth considering
The most widely used real-time bidirectional event-based communication library. Works across browsers and Node.js with automatic fallbacks and built-in reconnection.
Often Used Together
Complementary tools that pair well with Pusher
Learning Resources
Docs, videos, tutorials, and courses
Get Started
Repository and installation options
View on GitHub
github.com/pusher/pusher-js
npm install pusher pusher-jsQuick Start
Copy and adapt to get going fast
import Pusher from 'pusher';
const pusher = new Pusher({
appId: process.env.PUSHER_APP_ID!,
key: process.env.PUSHER_KEY!,
secret: process.env.PUSHER_SECRET!,
cluster: 'us2',
useTLS: true,
});
await pusher.trigger('notifications', 'new-order', { orderId: '123' });Code Examples
Common usage patterns
Live notifications
Push real-time notifications to clients
// Server: trigger from API route
import Pusher from 'pusher';
const pusher = new Pusher({ appId: process.env.PUSHER_APP_ID!, key: process.env.PUSHER_KEY!, secret: process.env.PUSHER_SECRET!, cluster: 'us2', useTLS: true });
export async function POST(req: Request) {
const body = await req.json();
await pusher.trigger(`user-${body.userId}`, 'notification', { message: body.message });
return Response.json({ ok: true });
}Presence channel
Show who is currently online
// Client: subscribe to presence channel
import Pusher from 'pusher-js';
const pusher = new Pusher(process.env.NEXT_PUBLIC_PUSHER_KEY!, { cluster: 'us2' });
const channel = pusher.subscribe('presence-room');
channel.bind('pusher:member_added', (member: any) => {
console.log('User joined:', member.info.name);
});
channel.bind('pusher:member_removed', (member: any) => {
console.log('User left:', member.info.name);
});Community Notes
Real experiences from developers who've used this tool