Amazon Simple Queue Service (Amazon SQS) ​

Amazon Simple Queue Service is a swift, reliable, scalable and fully managed message queuing service. SQS simplifies and saves the cost of disconnecting the components of a cloud application. You can use SQS to send any amount of data at any speed level without losing messages or involving other available services.

With SQS, you can lighten the administrative burden of managing and scaling a high-availability message cluster, while paying a low price for mainly what you use.