Node.js Creator Ryan Dahl Joins Cloudflare, Deno Runtime Ends Development

Ryan Dahl, the creator of Node.js, has joined Cloudflare to work on its Workers platform, effectively ending the independent future of the Deno runtime. According to The Register, Cloudflare acquired Dahl’s company in a deal that brings him and twelve colleagues into the fold to expand server-side computing capabilities.

The acquisition serves as an acquihire rather than a product continuation. Cloudflare will maintain the open-source Deno JavaScript runtime for another year before ceasing active development. Dahl told The Register that he now believes choosing Node.js for building servers is the wrong approach, favoring the Cloudflare Workers model instead.

Context and Background

Dahl originally created Node.js in 2009 to address memory inefficiencies in the Apache web server. Using the Google V8 engine, Node.js allowed JavaScript execution on the server with high concurrency and low memory usage. Today, the runtime powers approximately 30 million websites globally and sees 130 million downloads, indicating widespread use in internal operations as well.

Deno was launched in 2018 as a rewrite of Node.js, designed to fix perceived flaws in the original project. The name is an anagram of Node. Deno introduced features such as built-in fetch, a permission model, and native TypeScript support. Sequoia Capital backed Dahl’s company with $21 million in 2022, and the runtime reached 400,000 monthly users by August of this year.

Who Is Affected

Developers using Deno will face a defined end-of-life timeline for active feature development. As Threat Times reported on October 17, 2026, the acquisition signals a one-year maintenance window before the runtime ceases active development. Users must plan for migration or reliance on maintenance-only updates during this period.

Cloudflare’s Workers platform will benefit from the engineering talent acquired. Dahl emphasized that traditional servers operate at the Linux VM layer, whereas Cloudflare Workers offer a different architectural approach. The company aims to expand this platform for potential open-source use, leveraging the expertise of the former Deno team.

What should you do?

Organizations using Deno should assess their dependency on the runtime and plan for the upcoming maintenance-only phase. Developers should evaluate whether migrating to Cloudflare Workers or another platform aligns with their long-term infrastructure goals. Monitoring official announcements from Cloudflare regarding the transition timeline is essential for accurate planning.

What to do and how to stay safe: Cloudflare

• Review current applications running on Deno to determine compatibility with future maintenance-only updates.
• Evaluate Cloudflare Workers as a potential alternative for server-side JavaScript workloads.
• Monitor official channels from Cloudflare and Deno for detailed migration guides and timelines.
• Assess the impact of the one-year maintenance window on long-term project roadmaps.

Step-by-step guide: Mobile Device Security: How to Protect Data Beyond Passwords

General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.

Frequently asked questions

What happens to the Deno runtime after the acquisition?

Cloudflare will maintain the Deno runtime for one year before ending active development, as stated in the acquisition announcement.

Why is Ryan Dahl joining Cloudflare?

Dahl joined Cloudflare in an acquihire deal to work on expanding the Workers platform with twelve other engineers from Deno.

How many users does Deno have?

As of August, Deno had amassed 400,000 monthly users, according to reporting by The Register.