Deno joins Cloudflare, with Deno Deploy set to shut down in six months

Deno’s entire team is joining Cloudflare, which says the teams are combining work on workerd and celld. The joint effort aims to make the Workers programming model easier to use beyond Cloudflare and a mainstream way to build servers. Deno founder Ryan Dahl says the team will focus future development on this shared platform rather than a separate runtime and hosting service.

Deno Deploy will continue operating for six months before shutting down. The Deno runtime will receive monthly bug-fix and security releases for another year, after which the team plans to stop developing it. Deno will remain open source, and the company welcomes others who want to continue its development. JSR will keep operating, with its infrastructure moving to Cloudflare. Paying customers moving to Cloudflare Workers will receive migration support.

Dahl describes the move as a progression from Deno to Deno Deploy to celld. He says operating Deploy exposed the complexity beneath its developer experience. Celld builds on the Workers programming model and is intended to let developers create distributed applications from the start, with scaling built into the programming model rather than assembled separately for each application. Cloudflare says the combined work is intended to make distributed applications easier to operate on developers’ own infrastructure.

Dahl says the need for better abstractions is especially acute with AI and points to Durable Objects as useful for agent harnesses. He highlights their serverless execution, persistent state, WebSockets and high-level JavaScript interface. Cloudflare describes Durable Objects as combining compute with storage and lists AI agents, collaborative applications and real-time interactions among their uses. Its documentation says each object has a globally unique name and attached durable storage. For AI builders, the move matters because Deno says it wants to explore these Durable Object capabilities for agent harnesses as it focuses on the shared platform.