Cloudflare launches K2 in open beta: serverless event streams built on R2 storage
ritakozlov · x · 2026-10-01
Cloudflare announced K2, a durable event streaming primitive on its Developer Platform, now in public beta.
- The problem it solves: In traditional RPC architectures, producers and consumers must align in scale and time; if consumers fall behind or go down, events are dropped. K2 decouples the two, letting multiple consumers (e.g., analytics and fraud detection) read independently at their own pace.
- How it works: Events are sent to a K2 stream, stored as an ordered log, and can be consumed via partitioned reads or broadcast delivery.
- Under the hood: K2 implements a partitioned, durable log on top of R2 object storage. It is fully serverless, scales to massive data volumes, and supports long-term retention so consumer downtime doesn't lose data.
- Origin: K2 was first built as the ingestion layer for Basin Pipelines.
Developers can create their first stream in seconds via the official guide.
Related event: Cloudflare Birthday Week Unveils K2 Event Streaming and More(2 posts)→
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