Cloudflare Acquires Deno to Expand Workers and Open Source Model
Cloudflare is acquiring Deno to strengthen Workers and promote its server model, following Deno's open source celld launch. Deal terms remain undisclosed.
Summary
Cloudflare announced on October 10, 2026, that it is acquiring Deno, the startup behind the Deno programming runtime. Kenton Varda, principal engineer for Cloudflare Workers, said Deno will help improve the Workers programming model and platform, where customers build and run software across Cloudflare’s network. Deno recently launched celld, an open source implementation of Workers that impressed Cloudflare’s team.
Deno co-founders Bert Belder and Ryan Dahl, the creator of Node.js, will join Cloudflare, with Dahl aiming to make the Workers model a mainstream approach to building servers. Varda said celld supports Cloudflare’s position that open source software and an escape hatch are good business, countering a popular theory that Workers differs from other cloud platforms to create lock-in. Financial terms were not disclosed. Deno had raised $26 million, including a Series A led by Sequoia.
Positives
- Deno’s celld provides an open source implementation of Cloudflare Workers and impressed Cloudflare’s team.
- Ryan Dahl’s team will join Cloudflare to push the Workers programming model into mainstream server development.
- Cloudflare plans to use Deno’s technology to improve the Workers programming model and platform.
- $26 million in prior funding, including a Sequoia-led Series A, supported Deno before the acquisition.
- Cloudflare says open source software and an escape hatch are good for its business and customers.
Risks & concerns
- Financial terms remain undisclosed, leaving Deno’s acquisition price unknown despite its $26 million in funding.
- Cloudflare provided no integration schedule or specific details about how Deno will change the Workers platform.
- A popular lock-in theory claims Workers intentionally differs from other cloud platforms, an argument Cloudflare continues to contest.