Amazon Web Services (AWS) Amazon MQ Amazon Web Services (AWS) Kinesis Apache ActiveMQ Apache Artemis Apache Kafka Apache Qpid Apache Pulsar Cloverleaf (Enovation Lifeline - NL) Comverse Message Broker (Comverse Technology) Eclipse Mosquitto MQTT Broker (Eclipse Foundation) Enduro/X Transactional Message Queue (TMQ) Financial Fusion Message Broker (Sybase) Fuse Message Broker (enterprise ActiveMQ) Gearman Google Cloud Pub/Sub (Google) HiveMQ HiveMQ MQTT Broker EMQX EMQX MQTT Broker HornetQ (Red Hat) (Now part of Apache Artemis) IBM App Connect IBM MQ JBoss Messaging (JBoss) JORAM Microsoft Azure Service Bus (Microsoft) Microsoft BizTalk Server (Microsoft) MigratoryData (a very scalable message broker able to solve the C10M problem, i.e. 1000x more scalability than C10k problem) NATS (MIT Open Source License, written in Go) Open Message Queue Oracle Message Broker (Oracle Corporation) RabbitMQ (Mozilla Public License, written in Erlang) Redis An open source, in-memory data structure store, used as a database, cache and message broker.