Amazon Web Services announced a new capability for its serverless platform. Starting January 15, 2026, AWS Lambda can now trigger functions from DynamoDB Streams in a different AWS account. This update directly addresses a long-standing gap in multi-account event-driven architectures, enabling cross-account data triggers without complex workarounds.

Many organizations use separate AWS accounts to isolate production, development, and testing environments. Previously, sharing database change events across these accounts required building custom replication pipelines or third-party streaming tools. This added significant operational overhead and potential points of failure for teams trying to centralize event processing or collaborate across business units.

The new feature allows developers to configure resource-based policies directly on DynamoDB Streams. This lets a Lambda function in one account consume changes from a stream in another, eliminating the need for intermediate data pipes. It streamlines architectures for centralized logging, cross-team integrations, and unified analytics pipelines built on AWS.