HiveMQ MQTT Platform

HiveMQ is an enterprise MQTT platform that enables reliable, scalable machine-to-machine M2M and IoT communication. Founded in 2012 by Dominik Obermaier and Christian Goetz in Landshut, Germany, HiveMQ powers IoT deployments for BMW, Porsche, Siemens, and Cisco, handling billions of MQTT messages daily. Key features: enterprise-grade MQTT 5.0 and 3.1.1 broker written in Java, benchmarked at over 10 million concurrent MQTT connections on a single cluster. Horizontal scaling via cluster discovery using DNS, multicast, or static configuration, with automatic load balancing and failover. Full MQTT 5.0 support including shared subscriptions for load-balanced consumer groups, message expiry, and reason codes. TLS/SSL encryption, mutual TLS authentication, OAuth 2.0 integration, and client certificate validation with revocation checking. Java-based extension SDK for custom authentication, authorization, message transformation, and event handling. HiveMQ Edge industrial edge gateway supporting MQTT, Sparkplug B, OPC UA, Modbus, and S7 protocols. HiveMQ Cloud fully managed broker service on AWS and Azure with auto-scaling and certificate management. JMX metrics, Prometheus endpoint, and built-in dashboards for tracking connections and cluster health. Native WebSocket support for browser-based IoT dashboards. Shared subscriptions for load-balanced message distribution. Sparkplug B support for industrial IoT protocol specification defining MQTT topic structure for SCADA and industrial automation.