Centrifugo

Centrifugo is a server that adds live updates and realtime messaging to an existing app. It runs as a separate service: your backend publishes events to it, while browsers and phones keep an open connection.

Centrifugo holds client connections over several transport types and delivers messages to subscribed channels. Your application sends events through a simple publishing API, so the existing architecture stays as it is. It also handles authentication, can proxy connection events to your backend and supports delta updates.

• Publish events through a simple API
• Channel history and online presence
• Delta updates
• Scale out with Redis, PostgreSQL or NATS
• Official SDKs for web and mobile

Backend and full-stack teams that need live dashboards, chat, notifications or shared state in web and mobile apps. It suits teams that prefer to run their own realtime infrastructure rather than rely on a hosted service.

The server is open source under the Apache-2.0 license and can be self-hosted, including with a Docker image. A separate PRO edition adds features for corporate and enterprise use, such as analytics and realtime tracing. Running it yourself means you also manage hosting, scaling and monitoring.