Cloudflare Sets Deno Support To End Around October 2027
Cloudflare is buying the runtime to fold its celld technology into the open-source workerd runtime rather than to keep funding Deno, so Deno's future past 2027 rests on outside developers taking it over.
Reporting from 1 source: GIGAZINE.
Cloudflare said on October 9, 2026 that it has acquired the company behind the JavaScript runtime Deno, with the development team joining Cloudflare. Monthly bug fixes and security updates will continue for about a year, and official development ends around October 2027. Deno Deploy shuts down around April 2027. Paid users get migration support to Cloudflare Workers.
The Deno development team spent its later years building Deno Deploy and running into operational trouble: multiple cloud services and databases tangled together in a way that was hard to manage. That pushed the team toward Cloudflare Workers and its Durable Objects mechanism, and toward celld, which would let Workers-style machinery run on servers outside Cloudflare's own.
Cloudflare has already published the Workers runtime workerd as open source. The two teams now plan to fold celld's technology into workerd, and Deno's own development is the casualty. The runtime stays open source, but nobody has been named to continue it.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.