The best replacement for rabbitmq is zeromq.

The best alternatives to rabbitmq are rated as following:
★★★★★  zeromq
★★★★  redis
★★★  msmq
★★★  sqs
★★★  jms
★★★  kafka
★★  activemq
★★  qpid
★★  resque
★★  beanstalkd
★★  websphere mq
★★  gearman
★★  celery
★  nservicebus
★  azure service bus
★  mule
★  nsq
  hornetq
  ironmq
  mqtt

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

Other search terms related to rabbitmq and their ratings are:
★★★★★ mule
★★★★ spring integration
★ jms
★ celery
You have in mind a companion for rabbitmq and it is not yet here? Propose!



Google Trends

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