Messaging Queue Services

• CloudAMQP

• Google Cloud Pub/Sub

CloudAMQP

Pricing page

• Free tier: 1M messages/month, 100 queues, up to 20 concurrent connections, 10k queued messages

• Pros: offers replication, monitoring, administration interface; supports following hosting providers: AWS, Azure, Google, Digital Ocean

• Limitations: Allows maximum idle queue time of 28 days (can be removed by removing the default policy)

Google Cloud Pub/Sub

Pricing page

• Free tier: Free first 10GB

• Pros: Replication, 10k messages per second, by default, millions per second and beyond, upon request. Integration with Google Cloud Dataflow for analytics.