Cloudflare Welcomes Deno to the Fold

Date: October 9, 2026
Author: Ryan Dahl
Category: Announcements / Product Update

For several years, our primary mission has been the simplification of server-side software development. We spent our time interrogating the status quo: How should modules be distributed? What security benchmarks should a JavaScript runtime hit? What constitutes a truly complete toolchain? We also focused on the ability to ship applications as single, standalone executables.

As we evolved, ensuring compatibility with Node.js became a priority, as our community wanted Deno's modern advancements without sacrificing access to the vast existing JS ecosystem.

"We wanted to make running applications as straightforward as possible."

Through the collective effort of our team and community, we built a runtime that challenged the industry's assumptions about JavaScript development. Today, we are thrilled to announce that the entire Deno team is joining Cloudflare to accelerate this vision.

The Path to Distributed Compute

The journey toward this acquisition followed a specific logical progression. I previously detailed this in my JavaScript Containers post, where I discussed the synergy of compute, storage, and communication.

While building Deno Deploy was a leap forward, it revealed the lingering complexities beneath the surface of the developer experience. By leveraging the Cloudflare Workers model, celld allows developers to create distributed applications from day one. The most exciting aspect is that scaling is baked into the programming model itself, rather than being an infrastructure burden the developer must manually assemble.

The Strategic Shift

We are merging our efforts with the Workers and Durable Objects teams. Our goal is to establish this distributed programming model as the industry standard for server development, regardless of whether the code runs on Cloudflare's edge or private infrastructure.

Consequently, we are shifting our focus: Developing a separate runtime and hosting service $\rightarrow$ Investing in a shared, unified platform.

Concrete Impact & Timeline

We recognize that this is a significant transition for those who have relied on Deno. We are deeply grateful to every contributor, business owner, and user who trusted us.

Migration Checklist

• Review current Deno Deploy deployments.
• Plan migration to Cloudflare Workers (Paying customers receive migration support).
• Monitor JSR for infrastructure update notices.
• Evaluate workerd for rusty_v8 dependencies.

AI and the Future of State

The demand for superior abstractions is most evident in the realm of Artificial Intelligence. For those building AI agent harnesses, Durable Objects provide a critical combination of:

1. Low-cost, serverless execution.
2. Persistent state management.
3. Native WebSocket support.
4. A high-level JS interface.

This synergy is why celld prioritizes Durable Objects. In mathematical terms, we are trying to reduce the operational complexity of scaling agents from a manual overhead $\mathcal{O}(n)$ to a built-in system property $\mathcal{O}(1)$.

For a deeper dive, check out the joint post by Kenton Varda and myself on the Cloudflare blog.

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Contact Information: If you are scaling AI agents and require the ability to run them on your own hardware, please reach out to me at ry@cloudflare.com.