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Cloudflare acquires Deno to make Workers self-hostable

Cloudflare acquires Deno to make Workers self-hostable

Money Moves

Deal folds Deno's celld into workerd to extend the Workers model beyond Cloudflare's network

2 days ago: Cloudflare announces Deno team joining

Overview

Updated 1 hour ago

Cloudflare acquired Deno, the startup founded by Node.js creator Ryan Dahl, in a deal announced October 9. Deno's runtime gets a year of maintenance, Deno Deploy shuts down in six months, and the team moves to Cloudflare.

The prize is celld, Deno's two-month-old open-source implementation of the Workers model. Cloudflare is merging celld into workerd, its open-source Workers runtime, to make Durable Objects self-hostable—small servers with local SQLite databases and WebSocket support. The deal folds the community's main escape hatch from Cloudflare's platform into Cloudflare itself.

Why it matters

If the merge works, developers can run Cloudflare's Workers model on their own servers with just an object storage bucket.

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Key Indicators

$26M
Total funding Deno raised before acquisition
Includes a Series A led by Sequoia.
2 months
Age of celld at acquisition
celld launched in August 2026; the acquisition was announced October 9.
12 months
Deno runtime maintenance window
Monthly bug fixes and security updates before Deno core development ceases.

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People Involved

Organizations Involved

Timeline

2022 October 2026

3 events Latest: 2 days ago
  1. Cloudflare announces Deno team joining

    Latest Acquisition

    Cloudflare reveals it acquired Deno; celld and workerd will merge, with Ryan Dahl and Bert Belder leading the effort.

  2. Deno releases celld

    Product

    Deno ships celld, a Rust implementation of Workers and Durable Objects self-hostable with object storage as the only dependency.

  3. Cloudflare open-sources workerd

    Open Source

    After pitching Workers for Platforms to customers like Shopify, Cloudflare releases workerd as open source to reassure them they aren't locked in.

Scenarios

1

Self-hosted Workers reaches production with celld merged into workerd

Likely Resolves by End of 2027

Discussed by: Kenton Varda, Cloudflare; Ryan Dahl

Cloudflare merges celld's distributed Durable Objects into workerd, shipping a production-ready runtime that coordinates via object storage. Developers run Workers workloads on their own infrastructure and Cloudflare's network alike. Varda has said he will personally host Cloudflare OS this way.

2

Deno community keeps the runtime alive through a fork

Possible Resolves by Oct 1, 2027

Discussed by: Ryan Dahl (cited io.js precedent); The New Stack

As official support ends, the Deno community forks the codebase, mirroring the io.js fork that split from Node.js a decade earlier. Dahl has said the community is free to continue development and pointed to io.js as precedent.

3

Deno Deploy shutdown disrupts paying customers

Unlikely Resolves by Q2 2027

Discussed by: Forbes, The New Stack (migration coverage)

Deno Deploy ceases operation within six months as planned. Paying customers migrating to Cloudflare Workers report lost data or failed migrations. Cloudflare said it would provide migration assistance to paying customers.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

December 2014 - September 2015

io.js forks Node.js, then merges back (2014-2015)

Node.js governance stalled as maintainer Joyent resisted faster releases. Core contributors forked the project as io.js in December 2014, shipping on their own schedule. In September 2015 the Node.js Foundation formed and io.js merged back into Node.js.

Then

The community reunited under a neutral foundation with more open governance.

Now

The fork forced Node.js to adopt faster releases and broader participation.

Why this matters now

Dahl cited io.js as precedent for Deno continuing via community fork after official support ends. The history shows a fork can succeed without splitting the project permanently.

January 2008 - 2010

Oracle acquires MySQL, MariaDB fork takes root (2008-2010)

Sun Microsystems bought MySQL AB in 2008 for about $1 billion. When Oracle acquired Sun in 2010, MySQL's future under a rival incumbent worried the community. MySQL founder Monty Widenius had already forked the codebase as MariaDB, and the fork grew as major users migrated.

Then

MySQL continued under Oracle while MariaDB became a popular drop-in replacement.

Now

MariaDB now underpins many Linux distributions and enterprise deployments.

Why this matters now

Shows how a community fork can survive an open-source project's acquisition, and why the Deno community might do the same.

Sources

(4)