What is RabbitMQ? RabbitMQ is an Erlang-based implementation of AMQP (Advanced Message Queuing Protocol) which is an open standard that defines a protocol for systems to exchange messages. RabbitMQ provides support for the STOMP, MQTT, and HTTP protocols by the means of RabbitMQ plug-ins. Ok, simply speaking it’s a message broker (it accepts and forwards messages). Core Concepts Publishers (Producers) create messages and publish (send) them to a broker server (RabbitMQ).