Amazon Simple Queue Service (SQS) is a fully managed message queuing service offered by Amazon Web Services (AWS). SQS provides a flexible, scalable, and reliable way to decouple and distribute messages between distributed software components and microservices.

SQS pricing typically consists of two main components: requests and data transfer.

1. Request Pricing:

   • Standard Queues: Amazon SQS offers a free tier that includes 1 million free requests per month for Standard queues.
   • FIFO Queues: For FIFO (First-In-First-Out) queues, there are standard per-request charges, but there is no free tier available.

2. Data Transfer Pricing:

   • SQS charges for data transfer in and out of the service.
   • Data transfer in (ingress): Generally, there is no charge for data transfer into SQS.
   • Data transfer out (egress): There is a cost associated with data transfer out of SQS to different AWS regions or to the internet. The data transfer pricing varies depending on the AWS region and the total amount of data transferred.