Amazon SNS vs CloudAMQP

Amazon SNS is a managed publish/subscribe service for sending messages between applications and reaching people. It can deliver notifications to application endpoints and send SMS, mobile push, and email. Standard topics support nearly unlimited messages per second with best-effort ordering and deduplication; FIFO topics preserve order and prevent duplicate delivery within five minutes, with limits of 3,000 messages per second or 10 MB per second per topic. Publishers can batch 1 to 10 messages per request, while subscribers can filter notifications. Integrations include AWS event sources and destinations such as SQS, Data Firehose, Lambda, and HTTPS. Each message can contain up to 256 KB; the Extended Client Library can store payloads up to 2 GB in S3 and publish an object reference. SNS retries delivery and supports dead-letter queues. The free tier includes 1 million requests, 100,000 HTTP notifications, and 1,000 email notifications each month. Listed paid rates include $0.50 per month for API requests, $0.06 for HTTP deliveries, and $2.00 for email deliveries; charges depend on usage.

CloudAMQP is a managed cloud service for LavinMQ and RabbitMQ messaging clusters. It automates cluster setup, operation, and scaling, with a control panel for monitoring and alarms sent through email, webhooks, or external services. Plans support AMQP, AMQPS, HTTPS, STOMP, and MQTT; dedicated plans also support WEB-STOMP. The service runs on Amazon Web Services, Google Cloud Platform, Microsoft Azure, DigitalOcean, and Scaleway. It supports configurable delivery guarantees, per-queue ordering, dead-letter queues, and messages up to 128 MB. RabbitMQ clusters use Quorum Queues to replicate messages across nodes and reconnect clients after a node failure. SSL/TLS protects data in transit, with network isolation and VPC options on some clouds. CloudAMQP states that it is SOC 2, GDPR, and HIPAA compliant. Free plans are available; paid plans start at $19/mo. Customers cannot access nodes via SSH.