Amazon SNS now supports publishing batches of up to 10 messages in a single API request

Amazon Simple Notification Service (Amazon SNS) now supports message batching for the publish action, which let’s you publish up to 10 messages in a single batch request to either Standard Topics or FIFO Topics. Batching messages into a single API request is intended for those who want to reduce their costs associated with connecting decoupled applications with Amazon SNS. Previously, Amazon SNS required individual API requests for every published message.

Source:: Amazon AWS