Scalable self-hosted real-time messaging and state sync platform
Persistent Linux computers for AI agents, from about $0.03 an hour
Stage
Established
Not given
Founded
2023
Not given
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.
ac-2: $0.000008 per second ($0.0288 per hour), $13.50 monthly cap. ac-4: $0.000016 per second ($0.0576 per hour), $26.10 cap. ac-8: $0.000032 per second ($0.1152 per hour), $49.50 cap. ac-16: $0.000064 per second ($0.2304 per hour), $89.10 cap. ac-32: $0.000128 per second ($0.4608 per hour), $178.20
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
Full Debian 13 Linux VM with root access
Docker and Docker Compose included
Chromium desktop with screenshots and input actions
Private HTTPS preview URLs for any port
SSH access including VS Code over SSH
Pause and resume with state preservation
HTTPS API with MCP server support
Per-second billing with monthly caps
Snapshots and private images
Spend controls and monthly limits
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
Persistent state preserved across pause and resume cycles
Centrifugo
Dory