Deno is joining Cloudflare and winding down its investment in the runtime over the next year. Ryan Dahl announced last week that the Deno team is merging Deno's celld into Cloudflare's workerd. JSR keeps running on Cloudflare's infrastructure.
The announcement came two years to the day after Deno 2 shipped. Bun joined Anthropic ten months ago. The ecosystem has gotten the benefits Deno was pushing, just not from Deno itself.
Competition is imperative to a healthy ecosystem. Unfortunately, Deno never really hit critical mass in production; Node is as dominant in 2026 as it was in 2018. What Deno did achieve was to reinvigorate and put pressure on the incumbent.
Deno started as a clean break with deny-by-default permissions, TypeScript as a first-class input, web-standard APIs, ES modules only, and a single executable. Then, Bun showed up and rebuilt the toolchain from scratch for speed while running existing npm packages. Deno 2, in October 2024, finished the job with full Node and npm compatibility.
Cloudflare's workerd, which it open-sourced in 2022, grew its own Node compatibility layer because that's where the packages are. Node has shipped many features originally pioneered by Deno, including a global fetch, Web Socket, and a stable permission model. The alternative-runtime experiment is effectively over, with Node remaining the default despite Deno's innovations.
Source: Hacker News · Summarized by HeadlinesBriefing