Amazon SQS

Amazon SQS is a fully managed, high-scale message queuing service: it decouples application components, ensuring reliable communication and transparent scaling.

SQS (Simple Queue Service) is your backbone for asynchronous communication in distributed systems. It’s a fully managed queue service, eliminating the overhead of operating message-oriented middleware. You get two queue types: Standard queues offer near-unlimited throughput with at-least-once delivery, while FIFO (First-In-First-Out) queues guarantee message order and exactly-once processing. Messages up to 256KB are supported, and SQS handles all scaling transparently, ensuring high availability and durability by storing data redundantly across multiple AWS servers.

https://aws.amazon.com/sqs/