Announcing Cloudflare K2: Serverless Event Streams
Cloudflare, Thursday, October 1st, 2026
Cloudflare K2, now in public beta, is a serverless event streaming service built on R2 for durable, ordered log streams.
Cloudflare launched K2 in public beta as a durable event streaming primitive on its Developer Platform.
Producers send events to a K2 stream, which stores them as an ordered log built directly on R2 object storage, and consumers can read independently at their own pace, either splitting reads across a group or receiving all messages.
Decoupling producers and consumers avoids dropped events when downstream services are slow or unavailable, without the overhead of running broker clusters, and supports long-term retention.