Cloudflare acquires Deno to advance self-hosted Workers

Cloudflare has acquired Deno outright to deepen integration with the Cloudflare Workers ecosystem. The acquisition builds upon celld, an open-source project Deno released in August that replicates Cloudflare's Durable Objects pattern. Cloudflare aims to leverage celld to transform workerd self-hosting into a first-class supported path for building and executing applications using the Workers programming model.

As part of the transition, Cloudflare plans to maintain the Deno runtime for only one additional year. During this twelve-month period, the team will issue monthly releases dedicated strictly to security updates and bug fixes before ending official development. The project will remain open source for community contributors. Deno creator Ryan Dahl endorsed the sunsetting, explaining that Deno became caught in "the gravity well of node compatibility" and was no longer addressing major developer pain points.

Instead of maintaining a competing runtime, Dahl highlighted celld as a compelling new abstraction for backend systems. Relying solely on object storage for persistence and coordination, the project offers a fresh paradigm for server development rather than minor surface-level improvements to network or filesystem APIs.

For software engineers, the acquisition marks the end of Deno as an enterprise-backed alternative to Node.js. While Node.js introduced an experimental permissions model in version 20.0.0 back in April 2023 and marked it stable in version 22.13.0 in January 2025, Node still does not match Deno's ability to restrict access to specific network hosts. Developers utilizing Deno must now weigh community-led runtime maintenance against adopting Cloudflare's serverless stack.