Description

Amazon Simple Notification Service (SNS) is a fully managed pub/sub messaging service for decoupling microservices, distributed systems, and serverless applications.

Features

• Pub/sub messaging model
• Multiple protocols support (HTTP, email, SMS, mobile push)
• Topic-based message filtering
• Message durability with message archiving and replay
• Encryption at rest and in transit
• Cross-region message delivery

Limitations

• 256 KB message size limit
• No guaranteed message order
• Potential for occasional duplicate messages
• Limited message retention (up to 14 days)
• Regional service with cross-region limitations

Use Cases

• E-commerce platform using SNS to send order confirmations to customers via email and SMS
• IoT application leveraging SNS to distribute sensor data to multiple processing systems simultaneously
• Mobile app utilizing SNS for sending push notifications to users about breaking news or account updates