RabbitMQ - RabbitMQ is an open source message broker software.
CloudMQTT - CloudMQTT implements MQ Telemetry Transport protocol for carrying out messaging using a publish/subscribe message queueing model.
Apache Kafka - Apache Kafka is an open-source message broker project developed by the Apache Software Foundation written in Scala.
HiveMQ - HiveMQ is the MQTT based messaging platform for fast, efficient and reliable data movement to and from connected IoT devices and enterprise systems
ZeroMQ - ZeroMQ is a high-performance asynchronous messaging library.
EMQX Cloud - A fully managed MQTT service that connects your IoT devices to the cloud with reliable, real-time IoT data transmission, processing, and integration. Accelerate business that matters while avoiding the headaches of infrastructure management.