AWS Lambda Durable Functions represent a significant evolution in serverless application development, introduced at AWS re:Invent 2025. This new capability enables developers to build reliable, multi-step applications, that can run for extended periods, without paying for idle compute time while waiting for external events or human decisions.
In this article, we'll cover what they are, when you should use them, and how they compare with AWS Step Functions to help you choose the right orchestration tool for your serverless applications.
What Are Lambda Durable Functions?
Lambda Durable Functions are regular Lambda functions enhanced with stateful execution capabilities. They allow you to write complex, long-running workflows directly in your application code using familiar programming languages, rather than defining workflows in a separate orchestration language.
The key innovation lies in a…
