[djstein]

How is this different from RabbitMQ?

[tyingq]

There's a comparison page that includes RabbitMQ here: https://docs.nats.io/compare-nats

[iamcreasy]

Any idea why ZeroMQ is missing in the article?

[tyingq]

Maybe because the actual use of ZeroMQ varies a lot. Some brokerless-daisy-chain, some brokerless-mesh, some paired with brokers of different types (Zookeeper, RabbitMQ, others), and so on. So a comparison would be hard.