Question 1

What's the difference between SQS and SNS?

Accepted Answer

SQS is a queue: messages are stored until a consumer pulls them and processes them (good for work queues and task distribution). SNS is pub/sub: it pushes messages to subscribers (like HTTP endpoints, Lambda, email, or SQS queues). A common pattern is SNS for fan-out (broadcast) and SQS for buffering and reliable processing by workers.

Question 2

When should I use SQS?

Accepted Answer

Use SQS when you need to decouple parts of an application, run background jobs, smooth out traffic spikes, or reliably hand off work to worker processes. It’s a good fit when producers and consumers scale independently, when you want retries for transient failures, or when you need a buffer so downstream systems aren’t overloaded.

Question 3

How much does SQS cost?

Accepted Answer

SQS pricing is primarily based on usage: the number of requests (API calls such as SendMessage, ReceiveMessage, DeleteMessage) and any optional features you enable. Costs can increase with high polling rates, large message payload usage patterns, and cross-region data transfer (if applicable). Check the AWS SQS pricing page for current per-request rates and free tier details.

SQS

Definition

Real-World Example

Related Terms

Cloud Provider Equivalencies

See SQS in Action

Hackathon Entry: Homesharing Platform for Room Listings and Rentals

Baraza SACCO The Saga Pattern (Distributed Transaction Management)

AI Hackathon Review Platform on AWS

Bizbuy

Explore More Cloud Computing Terms