Amazon SQS marks 20 years of reliable messaging with major feature milestones

On July 13, 2006, Amazon Simple Queue Service (Amazon SQS) was launched as one of AWS's first three services alongside Amazon EC2 and Amazon S3. SQS provides a reliable way for distributed systems to pass messages asynchronously, decoupling producers from consumers to prevent cascading failures. Over two decades, SQS has evolved significantly. Key milestones from 2021 to 2026 include: high throughput mode for FIFO queues increasing from 3,000 TPS in May 2021 to 70,000 TPS in select regions by November 2023; server-side encryption with SSE-SQS introduced in November 2021 and made default in October 2022; enhancements to dead-letter queue redrive including console, SDK, CLI, and FIFO support; attribute-based access control (ABAC) introduced in November 2022 for scalable permissions; JSON protocol support added in November 2023 reducing latency and resource usage; EventBridge Pipes console integration enabling direct queue connections to AWS targets; Extended Client Library for Python released in February 2024 allowing messages up to 2 GB via S3 references; FIFO in-flight message limit increased from 20,000 to 120,000 messages in November 2024; fair queues introduced in July 2025 to mitigate noisy neighbor issues in multi-tenant workloads; and maximum message payload size increased to 1 MiB in August 2025 for both standard and FIFO queues, with Lambda event source mapping updated accordingly. The fundamental use case of SQS remains decoupling services, buffering bursts, and building resilient systems, now extending to AI workloads such as buffering requests to large language models and coordinating autonomous AI agents. For more information, visit the Amazon SQS product page, developer guide, or AWS Blogs.