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EMQX vs Eclipse Mosquitto
Eclipse Mosquitto is a light, open-source MQTT broker supporting MQTT 5.0 and 3.1.1 that suits single-board computers and home setups rather than large IoT deployments.
EMQX vs RabbitMQRabbitMQ is an MPL-2.0 messaging broker that speaks MQTT 5.0 and AMQP 1.0 and offers queues and streams, though production clusters take operational knowledge.
EMQX vs Apache ActiveMQ
Apache ActiveMQ is an Apache-2.0 Java broker supporting MQTT alongside JMS, AMQP and STOMP with high availability, but it requires Java and server administration.