Amazon Simple Notification Service

Amazon SNS helps you simplify your application architecture and reduce costs. With message batching, publisher systems can send up to 10 messages in a single API request. With message filtering, subscriber systems receive only the messages that they are interested in. To learn more, see Message Filtering and Message Batching.

Amazon SNS FIFO topics work with Amazon SQS FIFO queues to ensure messages are delivered in a strictly-ordered manner and are only processed once. This enables you to maintain accuracy and consistency when processing transactions across a single or multiple independent services. To learn more, see Message Ordering and Message Deduplication.

Amazon SNS provides encrypted topics to protect your messages from unauthorized access. The encryption uses a 256-bit AES-GCM algorithm and a customer master key (CMK) issued with AWS Key Management Service (KMS). Amazon SNS also supports VPC endpoints via AWS PrivateLink, so you can privately publish messages to Amazon SNS topics, from an Amazon Virtual Private Cloud (VPC) subnet, without traversing the Internet. To learn more, see Message Encryption and Traffic Privacy.

Amazon SNS stores each message published across geographically-separated data centers. If a subscribed system isn't available, Amazon SNS executes a message delivery retry policy. To preserve any messages that can't be delivered before the delivery retry policy ends, Amazon SNS can move them to dead-letter queues (DLQ). Amazon SNS can also archive messages in Amazon S3 via Amazon Kinesis Data Firehose subscriptions. To learn more, see Message Archiving, Delivery Retries, and DLQ.

Amazon SNS is an event-driven hub that has native integration with a wide variety of AWS event sources and destinations. Amazon SNS can capture and fan out events from more than 60 AWS services, from a number of AWS categories, such as Analytics, Compute, Containers, Databases, IoT, Machine Learning, Security, Serverless, and Storage. To learn more, see Event Sources and Event Destinations.

Amazon SNS enables you to send notifications directly to your customers. Amazon SNS supports SMS text messaging to over 200 countries, mobile push notifications to Amazon, Android, Apple, Baidu, and Microsoft devices, and also email notifications. Amazon SNS provides redundancy across multiple SMS providers, and enables you to send mobile push notifications using a single API for all mobile platforms. To learn more, see SMS, Mobile Push Notifications, and Email Notifications.