Is SNS the same as SQS? What is the difference between SNS and SQS?

Amazon SNS (Simple Notification Service) is a pub/sub messaging service that pushes notifications to multiple subscribers such as HTTP endpoints, email, SMS, or other AWS services. It is designed for broadcast and fan‑out scenarios. Amazon SQS (Simple Queue Service) is a message queue that stores messages until a consumer retrieves them. It is pull‑based and guarantees at‑least‑once delivery, making it ideal for decoupling producers and consumers and for reliable, scalable processing. SNS can fan out messages to one or many SQS queues, but SQS cannot push to SNS. In practice, you use SNS when you need to notify many endpoints simultaneously, and SQS when you need durable, ordered, or retryable message processing. The two services complement each other: SNS for broadcast, SQS for queueing.