Centrifugo is a real-time messaging server. It's language-agnostic and can be used in conjunction with application backend written in any programming language. Centrifugo runs as separate service and keeps persistent Websocket or SockJS connections from your application clients (from web browsers or other environments like iOS/Android apps). When you need to deliver event to your clients in real-time you publish it to Centrifugo API and Centrifugo then broadcasts event to all connected clients interested in this event (i.e. clients subscribed on event channel). In other words – this is a user-facing PUB/SUB server.
See server documentation.
You can also find the following posts interesting:
- Four years in Centrifuge – this is a story and motivation of Centrifugo
- How Centrifugo solves real problems of real-time applications – this is a write-up about Centrifugo benefits
How to install
Releases available as single executable files – just download latest release for your platform, unpack and run.
If you are on MacOS:
brew tap centrifugal/centrifugo brew install centrifugo
See official Docker image.
There are also packages for 64-bit Debian, Centos and Ubuntu.
Try our demo instance on Heroku (admin password is
password, secret is
secret, API key is
api_key). Or deploy your own Centrifugo instance in one click:
- Fast server capable to serve thousands of simultaneous connections
- Scale to millions of connections with Redis PUB/SUB, Redis Sentinel for high availability, consistent sharding support
- Easily integrates with any application – works as separate self-hosted service
- HTTP and GRPC API to communicate from your application backend (publish messages in channels etc)
- JSON and binary Protobuf Websocket client protocol
- SockJS polyfill for web browsers without Websocket support (JSON only)
- JWT-based user authentication and private channel authorization
- Presence information for channels (show all active clients in channel)
- History information for channels (last messages published into channel)
- Join/leave events for channels (client goes online/offline)
- Automatically recover missed messages between client reconnects over configured retention period
- Built-in admin web panel
- Cross platform – works on Linux, MacOS and Windows
- Ready to deploy (Docker, RPM/DEB packages, Nginx configuration, automatic Let's Encrypt TLS certificates, Prometheus/Graphite monitoring)
- MIT license