The enhanced Custom event bus enables organizations to create scalable, event-driven applications by routing events between applications, SaaS offerings, and AWS services. It supports sharing event buses across accounts via AWS Resource Access Manager, allowing multiple teams to publish and consume events through a central bus. The update includes support for common JSON event formats, built-in retention of 24 hours extendable to one year, and a new Subscriber resource to filter and deliver events to over 250 AWS services.
Additional improvements include strict ordering to guarantee event processing sequence and automatic content-based deduplication to avoid repeated event handling. The enhanced bus is available in fourteen AWS regions and introduces a new pricing model based on data transferred, aiming to reduce costs as workloads scale. The prior version is now termed 'Custom event bus - classic,' with unchanged APIs.
Source & further reading
Amazon EventBridge relaunches event buses for enterprise scale ↗Source published 2026-09-24. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.