AWS relaunches EventBridge custom event bus: one bus for the whole org

On September 24, 2026, AWS introduced a new custom event bus resource (eventsv2 API) with its own namespace, sharing model and data-volume pricing. It adds per-group FIFO, 5-minute deduplication, retention up to 365 days and replay. Pricing is $0.18/GB ingress, $0.05/GB egress per subscriber, available in 14 Regions.

• New eventsv2 resource; existing buses become Custom event bus – classic
• Shared via AWS RAM, default quota of 10,000 subscribers per bus
• FIFO per EventGroupId, 5-minute dedup, retention 1–365 days
• Pricing: $0.18/GB ingress, $0.05/GB egress, $0.08/GB-month retention