AWS Reworks EventBridge Custom Buses for Enterprise-Scale Architectures

AWS introduced an enhanced Custom Event Bus for Amazon EventBridge, letting organizations share a single bus across multiple AWS accounts via AWS Resource Access Manager. It adds native ordering, retention and replay, content-based deduplication, a Subscriber resource and ingress/egress pricing, with existing buses kept as Custom event bus-classic.

• Single bus shared across AWS accounts via AWS Resource Access Manager
• Supports up to 10,000 subscribers by default, higher quota on request
• Event retention and replay from 1 to 365 days, 5-minute dedup window
• New pricing: publishers pay ingress, subscribers pay egress