Programming language: Go
License: Apache License 2.0
Tags: Communication systems     Custom    
Latest version: v3.2.0

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Centrifugo is a scalable real-time messaging server in a language-agnostic way.

Centrifugo works in conjunction with application backend written in any programming language. It runs as a separate service and keeps persistent connections from application clients established over several supported types of transport (WebSocket, SockJS, EventSource, GRPC, HTTP-streaming). When you need to deliver an event to your clients in real-time, you publish it to Centrifugo server API – and Centrifugo then broadcasts the event to all connected clients interested in this event (clients subscribed to the event channel). In other words – Centrifugo is a user-facing PUB/SUB server.

For more information follow to Centrifugo documentation site.


How to install

See installation instructions in Centrifugo documentation.


Try our demo instance on Heroku (admin password is password, token_hmac_secret_key is secret, API key is api_key). Or deploy your own Centrifugo instance in one click:



  • Centrifugo is fast and capable to scale to millions of simultaneous connections
  • Simple integration with any application – works as separate service, provides HTTP and GRPC API
  • Client connectors for popular frontend environments – for both web and mobile development
  • Strict client protocol based on Protobuf schema
  • Bidirectional transport support (WebSocket and SockJS) for full-featured communication
  • Unidirectional transport support without need in client connectors - use native APIs (SSE, Fetch, WebSocket, GRPC)
  • User authentication with a JWT or over connection request proxy to configured HTTP/GRPC endpoint
  • Proper connection management and expiration control
  • Various types of channels: anonymous, authenticated, private, user-limited
  • Various types of subscriptions: client-side or server-side
  • Transform RPC calls over WebSocket/SockJS to configured HTTP or GRPC endpoint call
  • Presence information for channels (show all active clients in a channel)
  • History information for channels (last messages published into a channel)
  • Join/leave events for channels (client subscribed/unsubscribed)
  • Automatic recovery of missed messages between reconnects over configured retention period
  • Built-in administrative web panel
  • Cross platform – works on Linux, macOS and Windows
  • Ready to deploy (Docker, RPM/DEB packages, automatic TLS certificates, Prometheus instrumentation, Grafana dashboard)
  • Open-source license


This repository is hosted by packagecloud.io.

Also thanks to JetBrains for supporting OSS (most of the code here written in Goland):

*Note that all licence references and agreements mentioned in the Centrifugo README section above are relevant to that project's source code only.