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Home/Categories/APIs & Integration/Centrifugo
icon of Centrifugo

Centrifugo

Open source alternative to Pusher, Ably and PubNub

  • 10.9K stars
  • Apache-2.0
  • Active this week
  • Last commit 2 days ago

Last verified Oct 20, 2026

Run a self-hosted real-time messaging server with WebSockets, SSE, gRPC, and WebTransport. Best for teams leaving Pusher, Ably, or PubNub.

Visit websiteGitHub10.9K stars1-click deploy on Hostinger
image of Centrifugo
TL;DR

Centrifugo is a realtime messaging server for WebSocket and event-driven application updates. It replaces building and operating custom WebSocket infrastructure or paid realtime APIs like Pusher when teams need pub/sub, presence, and connection fan-out under their control. Best for developers adding realtime features to an existing backend.

Read the full breakdownHide the full breakdownWho it is for, how it works, trade-offs and the FAQ
who it's for

Who Centrifugo is for#

Backend teams adding live product updates

Use Centrifugo for notifications, collaboration state, chats, and dashboards where the core app publishes events to connected clients.

Skip if:

Skip if server-sent events or periodic polling are enough for your latency needs.

SaaS teams replacing hosted realtime APIs

It fits teams that want to move Pusher-style workloads onto their own infrastructure for cost or control reasons.

Skip if:

Skip if you need a fully managed realtime service and do not want to run socket infrastructure.

the problem

The problem it solves#

Realtime features look simple until thousands of clients need reliable fan-out, authorization, reconnect behavior, and presence state. Custom WebSocket code tends to leak application complexity into the transport layer, while hosted realtime APIs can become expensive or restrictive once traffic grows.

how Centrifugo solves it

How it solves it#

Realtime client fan-out

Handles WebSocket and realtime messaging patterns so the application backend can publish events instead of managing every client socket.

Language-agnostic backend integration

Centrifugo sits beside existing backends, which lets teams keep their app in any language while using a dedicated realtime server.

Presence and channel patterns

Supports common realtime primitives such as channels and connection state that products need for collaboration, notifications, and live dashboards.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Dedicated realtime layerTeams avoid embedding socket lifecycle code directly into the main application server, which keeps realtime delivery easier to scale and observe.
  • Apache-2.0 self-hosted optionThe Apache-2.0 repository gives teams a permissive path for commercial use and infrastructure ownership.

Trade-offs

  • -Requires an application-side auth designCentrifugo does not remove the need to decide who can subscribe, publish, or see presence. Teams still need a clean token and permission model.
tech stack · detected from GitHub

What it's built on#

Languages
Go
Frameworks
gRPCSocket.IO
Infrastructure
HTTP/3
Messaging
Server-Sent EventsWebSocketWebTransport
Cache
Redis
frequently asked

FAQ#

What is Centrifugo used for?

Centrifugo is used to add realtime messaging, pub/sub, and client fan-out to web and mobile applications.

Is Centrifugo self-hosted?

Yes. Centrifugo is distributed as server software that can run alongside your existing backend.

Is Centrifugo a full chat app?

No. It provides the realtime messaging layer. You still build product-specific chat UI, persistence, moderation, and permissions.

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Hostinger

Run Centrifugo on your own server

Hostinger sets Centrifugo up as a one-click app on a VPS.

Deploy on Hostinger

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