Cloudflare announced that the entire team behind Deno would join the company as part of an acquisition whose value was not disclosed, in a move that effectively ends development of the independent Deno runtime and the Deno Deploy hosting service. The team, founded by Ryan Dahl, the creator of Node.js, will move to work on Cloudflare Workers and the distributed application runtime ecosystem.
The deal goes beyond adding an engineering team to Cloudflare; it reshapes one of the historical competitors to the Workers platform and gives an open-source project recently launched by Deno, called Celld, a central role in the future of Cloudflare’s software environment.
A Competing Platform Becomes Part of Workers
Deno emerged in 2018 as an attempt to address problems Dahl identified in Node.js, particularly those related to security and dependency management. The company raised approximately $26 million through two funding rounds, then launched Deno Deploy to compete with Cloudflare Workers in running JavaScript and TypeScript without managing the underlying infrastructure.
In August, Deno unveiled Celld, an open-source project that recreates the Workers and Durable Objects model for running distributed applications on infrastructure managed by the user. Deno described the project as being directly inspired by Cloudflare’s design, while Cloudflare acknowledged that the Deno team had expertise in making the self-hosted runtime more usable, a point the company said it had not fully solved with Workerd.
What Will Change for Developers?
Cloudflare intends to integrate Celld with Workerd, its existing open-source runtime, with Ryan Dahl and Bert Belder, Deno’s co-founder, leading the work. The goal is to make Cloudflare’s application model for developing distributed applications available for operation on infrastructure independent of the Cloudflare network.
According to Dahl, the merged project will remain open source and is likely to use the Apache 2.0 license currently used by Celld. He says that operating a cluster of Workerd instances will require an object storage container following an industry standard for coordination and storage, while preserving an API similar to that of the Cloudflare platform.
However, this does not mean that Deno’s current products will continue as they are. Deno’s runtime will receive monthly maintenance and security updates for an additional year, while Deno Deploy will shut down within six months, with migration assistance provided to paying customers. The JSR package registry will continue under Cloudflare’s management.
Why Does This News Matter?
The deal gives Cloudflare a team and technology to address a practical gap in its open-source strategy: running the Workers model outside its infrastructure in a way that includes the surrounding tools and services necessary for real-world use. For developers, the integration could open the door to running distributed applications with the Cloudflare interface and greater portability, but that promise depends on the details of implementation, licensing, and actual support for independent environments.
The decision also ends one of the prominent independent alternatives in the JavaScript runtimes market. Although Deno’s runtime will remain licensed under the MIT license during the maintenance period, its development will stop, leaving users with the choice of migrating or waiting for the new path based on Workerd.
The Platform’s Relevance to Artificial Intelligence Applications
Dahl believes that the new model could be suitable for artificial intelligence agents because Durable Objects combine low-cost serverless execution, persistent state, WebSockets, and a high-level JavaScript interface. However, the source presents this as a target area for the technology, not as a proven result of the platform’s performance or adoption among agent applications.
The deal follows Anthropic’s acquisition of Bun in December 2025, but the two paths are different: Anthropic committed to continuing development of Bun as an open-source JavaScript runtime, while Deno will end development of its independent runtime and direct its resources toward the project integrated with Cloudflare.