
Leader in realtime technologies for developers
Pusher is a hosted realtime communication API that enables developers to add live features like notifications, chat, and real-time updates to web and mobile applications. With 40+ SDKs and a flexible pub/sub messaging model, Pusher handles WebSocket infrastructure so teams can focus on building features instead of managing connections.
Pub/sub messaging API with public, private, and presence channels for organizing real-time data flows
Client and server libraries for JavaScript, Python, Ruby, Go, PHP, Java, .NET, and many more languages
Track which users are online and subscribed to specific channels for collaborative features
Encrypted channels ensure message contents remain private between sender and recipients
Server-side notifications for channel events like subscription, unsubscription, and client events
Cross-platform push notifications for iOS, Android, and web with device interest and user targeting
Real-time event viewer in the dashboard for monitoring and debugging channel activity
Build real-time chat features for customer support, team collaboration, or social apps with presence awareness
Push real-time data updates to dashboards, activity feeds, and notification systems without polling
Enable multi-user collaboration features like live cursors, shared editing, and real-time document sync
Power multiplayer game state synchronization, live scores, and interactive audience participation features
Built-in heartbeat and automatic reconnection handling with fallback to HTTP streaming
Stream sensor data and device status updates in real-time from connected devices to monitoring interfaces

AI-powered omnichannel conversation suite for customer engagement