Apache ActiveMQ is an open-source message broker. It is one of the most popular Apache open source products and supports multiple industry-standard connectivity protocols. Clients can choose among multiple different languages and platforms for connectivity to ActiveMQ. Apache ActiveMQ provides client libraries in C++, Python, Java, C, etc. for developing applications. Some of the most popular protocols supported by ActiveMQ are AMQP, STOMP, MQTT, and JMS. ActiveMQ supports a wide variety of messaging use cases to meet almost all the needs of a production-grade messaging system.
Amazon MQ
AWS provided Amazon MQ is a managed service that can be used for Apache ActiveMQ or RabbitMQ. Amazon MQ service makes the management, configuration, deployment, and usage of these two message brokers easy on AWS. Amazon MQ makes the lifecycle management and operation of these services easy for an IT organization as this is a fully managed service provided by AWS. Code written to connect to on-prem Apache ActiveMQ can be transparently migrated to use ActiveMQ using AWS.