Developer tools · Vendor site 2026-10-04
Centrifugo is an open-source real-time messaging server that delivers pub/sub events over WebSocket, SSE, HTTP streaming, WebTransport, and gRPC. Teams integrate it with any backend to power chats, live comments, multiplayer sync, and AI streaming with horizontal scaling via Redis, PostgreSQL, or NATS.
Backend engineers building realtime features who want a dedicated messaging layer decoupled from app business logic.
PRO features require a commercial license with flat pricing based on company size, not per-connection metering.
Centrifugo advertises scalable websocket messaging and state sync with official SDKs, broker-backed clustering, and optional PRO observability and push features.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Transports | Intro docs list WebSocket, HTTP-streaming, SSE, WebTransport, and GRPC client transports. | Facts sourced | 2026-10-04 |
| Scaling | Homepage notes horizontal scaling through Redis, PostgreSQL, and NATS brokers. | Facts sourced | 2026-10-04 |
| PRO licensing | PRO page states flat company-wide licensing without per-connection or per-message fees. | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
Open-source Centrifugo is free to self-host; Centrifugo PRO uses flat company-wide licensing quoted by sales rather than published monthly USD tiers.
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Centrifugo PRO FAQ states pricing is flat based on company size and never on connections, nodes, or message volume.
PRO FAQ explains unlicensed PRO runs in sandbox mode capped at 20 concurrent connections, 2 nodes, and 5 API requests per second for evaluation.
Centrifugo is an open-source real-time messaging server that delivers pub/sub events over WebSocket, SSE, HTTP streaming, WebTransport, and gRPC. Teams integrate it with any backend to power chats, live comments, multiplayer sync, and AI streaming with horizontal scaling via Redis, PostgreSQL, or NATS.
Open-source Centrifugo is free to self-host; Centrifugo PRO uses flat company-wide licensing quoted by sales rather than published monthly USD tiers.. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Documentation describes server HTTP and GRPC APIs for publish, presence, history, and proxy events.. API access and subscription access may have different terms; consult the linked sources.
PRO features require a commercial license with flat pricing based on company size, not per-connection metering.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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