As xyzzy123 mentioned, many of these message brokers have different feature sets and thus have different use cases. In general, most companies will pick a messa

As xyzzy123 mentioned, many of these message brokers have different feature sets and thus have different use cases. In general, most companies will pick a message broker based on 1) Their use-case needs 2)The support for the programming language and system environment (.net, linux, cloud). For instance if I'm moving terrabytes of data, I'm probably picking kafka.