| MQTT Engine | | | |
| Full MQTT 3.1 support |  |  |  |
| Full MQTT 3.1.1 support |  |  |  |
| Full MQTT 5 support |  |  |  |
| MQTT version compatibility layer |  |  |  |
| Websockets |  |  |  |
| IPv4 & IPv6 |  |  |  |
| TLS / SSL |  |  |  |
| Linear Scaling Shared Subscription Sharding | |  |  |
| Linux Epoll Support | |  |  |
| MQTT Add-ons | |  |  |
| Proxy Protocol | | |  |
| Extensions | | | |
| HiveMQ Extension Marketplace |  |  |  |
| Community Extension SDK |  |  |  |
| Enterprise Extension SDK | |  |  |
| Extension Hot Reload | |  |  |
| HiveMQ Enterprise Extensions | |  |  |
| Clustering | | | |
| Cluster Support | |  |  |
| Zero Downtime Upgrades | |  |  |
| Elastic and linear scalability at runtime | |  |  |
| Pluggable Auto-Discovery | |  |  |
| Autoscaling support | |  |  |
| Cluster Overload Protection | |  |  |
| HiveMQ Control Center | | | |
| Real-time monitoring Dashboard | |  |  |
| MQTT Client Drill-Down Analysis | |  |  |
| Client Event History | |  |  |
| Shared Subscription Drill-Down Analysis | |  |  |
| Retained Messages Drill-Down Analysis | |  |  |
User Authentication with Third Party Systems
| |  |  |
| Backup & Restore | |  |  |
| Advanced Analysis | | |  |
| Trace Recordings | | |  |
| Role Based Access Control | | |  |
| Security | | | |
| TLS / SSL for MQTT |  |  |  |
| Pluggable Authentication |  |  |  |
| Authorization and Permissions |  |  |  |
| Native TLS / SSL | | |  |
| OCSP Stapling | | |  |
| Secure cluster communication with TLS / SSL | | |  |
| Audit Logs | | |  |
| Connection Overload Protection | | |  |
| Handshake Overload Protection | | |  |
| Monitoring | | | |
| MQTT Message Metrics |  |  |  |
| JMX Monitoring |  |  |  |
| Open Source Monitoring Extensions |  |  |  |
| 800+ Monitoring Metrics | |  |  |
| Grafana Dashboards | |  |  |
| Tools | | | |
| REST API | |  |  |
| K8s Operator | |  |  |
| MQTT CLI – Client Export | |  |  |
| Enterprise Extensions | | | |
| Integration with Apache Kafka | |  |  |
| Bridging to another MQTT broker cluster | |  |  |
| Enterprise Security Extension | |  |  |
| Software License | | | |
| License | Apache v2 | Commercial | Commercial |
| Technical Support | | | |
| Support | Community Forum | Up to 24/7 Support | 24/7 Support |