Apache Kafka - Apache Kafka is an open-source message broker project developed by the Apache Software Foundation written in Scala.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
RabbitMQ - RabbitMQ is an open source message broker software.
PagerDuty - Cloud based monitoring service
Apache ActiveMQ - Apache ActiveMQ is an open source messaging and integration patterns server.
Anypoint MQ - With Anypoint MQ, perform advanced asynchronous messaging scenarios — such as queueing and pub/sub — with hosted and managed cloud message queues and exchanges.