Amazon SNS uses cross availability zone message storage to provide high message durability. Amazon SNS topics are available whenever your applications need them, thanks to Amazon's proven network infrastructure and data centers. Amazon SNS leverages the proven AWS cloud to dynamically scale with your application. Amazon SNS reliably delivers messages to all supported AWS endpoints, such as Amazon SQS queues and AWS Lambda functions. Amazon SNS helps you simplify your pub/sub messaging architecture by offloading the message filtering logic from your subscriber systems, and message routing logic from your publisher systems.
Amazon SNS Reviews