- fully managed [[PubSub|Publish Subscribe]] messaging service - sends messages to multiple subscribers (i.e email, Lambda, [[AWS SQS|SQS]] etc) - typically used for applications that need realtime notifications - unlike [[AWS SQS|SQS]], SNS does not persist messages - it just delivers messages to subscribers that are present, then deletes them ![[CleanShot 2025-03-02 at 15.50.19.png]] https://ably.com/topic/aws-sns-vs-sqs#:~:text=SNS%20is%20typically%20used%20for,1%20minute%20to%2014%20days).