The best replacement for activemq is rabbitmq.

The best alternatives to activemq are rated as following:
★★★★★  rabbitmq
★★★★  hornetq
★★★  apollo
★★★  qpid
★★  camel
★★  msmq
★★  ibm mq
★★  websphere mq
★  redis
★  jms
★  tibco
★  tibco ems
★  amqp
★  openmq
  jbossmq
  weblogic jms
  nservicebus
  akka
  sqs
  mqseries
  gearman
  openjms
  kafka

Your alternative for activemq is not listed? Suggest!
Speaking about activemq, one probably shouldn't forget about jboss.

Other search terms related to activemq and their ratings are:
★★★★★ jboss
★★★★★ camel
★★★★★ spring tutorial
★★★ websphere
★★ glassfish
★★ spring integration
★★ apache camel
★ mule
★ jms
You have in mind a companion for activemq and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of activemq in all years. Click on graph for more.
activemq
rabbitmq
hornetq