Scalable self-hosted real-time messaging and state sync platform
One API for hundreds of AI models with unified billing and refundable balance
Stage
Established
Startup
Founded
2023
2026
Based in
CY
Not given
Pricing model
Open source
Paid
Pricing
Open source version is free. Centrifugo PRO available with flat licensing (no per-connection or per-message fees) and requires contacting sales for a quote.
Usage-based prepaid credits with transparent per-token pricing. Examples: GPT-6.1 Terra from $0.15 input / $0.75 output per 1M tokens; Claude Haiku 5.5 from $0.03/M input / $0.12/M output; Claude Opus 5.5 from $1.12/M input / $5.6/M output. First top-up receives 10% bonus credits (up to $200, minimu
Key features
WebSocket, HTTP-streaming, SSE, WebTransport, and gRPC transports
Channel history and message recovery
Flexible authentication and authorization
State synchronization with transactional consistency
Connection event proxying to backend
Online presence detection for users
Efficient binary Protobuf protocol
Resumable streams and transport fallback for AI applications
One API for hundreds of models across OpenAI, Anthropic, Google, DeepSeek, MiniMax and more
OpenAI, Anthropic, and Vertex protocol compatibility
Multi-layer redundancy with automatic failover
Usage-based billing with no monthly minimum
Only successful requests are billed, failures are free
Refundable balance at any time
Visible rate limits per account
Support for text, image and video workloads
What makes it different
Set up once and works forever with no ongoing configuration needed
Handles millions of concurrent connections with minimal hardware
Self-hosted so messages and data never leave your infrastructure
No per-connection or per-message billing
Works in production at scale with proven reliability
Reliability-first architecture with multi-layer redundancy across network, gateway and model layers
Transparent, refundable balance instead of locked-in subscriptions
Unified billing across all model families with one invoice
Health-aware routing across vendors with automatic failover
Centrifugo
RouteMux