sockudo/sockudo — A high-performance Pusher drop-in replacement built for

Sockudo

A high-performance, scalable WebSocket server for real-time applications, built in Rust.

🚀 High Performance - Handle 100K+ concurrent connections
🔄 Dual Protocol - V1 for Pusher compatibility, V2 for Sockudo-native with serial numbers, message IDs, and connection recovery
🔗 Connection Recovery - Ably-style serial-based message replay for exactly-once delivery (V2)
🆔 Message Idempotency - Automatic message_id on every broadcast, HTTP-level idempotency_key deduplication
🏗️ Scalable Architecture - Redis, Redis Cluster, NATS adapters
🛡️ Production Ready - Rate limiting, SSL/TLS, metrics
⚡ Async Cleanup - Non-blocking disconnect handling
📊 Real-time Metrics - Prometheus integration
🧠 Delta Compression + Conflation - Fossil and Xdelta3 (VCDIFF) with per-channel controls
🏷️ Tag Filtering - High-performance server-side filtering with optional tag emission controls
🌐 Native WebSocket Engine - sockudo_ws with advanced runtime tuning
📦 Official SDKs - Client and server SDKs for all major platforms