Cloudflare acquires Deno to improve Workers programming model

Cloudflare announced on Friday that it is acquiring Deno, the startup behind the TypeScript and JavaScript runtime of the same name. The move is designed to directly enhance Cloudflare’s Workers programming model and platform, which allows customers to build and run software on Cloudflare’s global network. According to TechCrunch, the acquisition brings the engineering team behind Deno into Cloudflare to refine the core infrastructure of its edge computing services.

The details

Kenton Varda, principal engineer for Cloudflare Workers, stated that the company will use the acquisition to improve its Workers programming model. Varda highlighted a specific catalyst for the deal: Deno recently launched celld, an open-source implementation of Workers. Varda wrote that the Cloudflare team was “delighted” by this development, noting that the existence of a third-party, open-source competitor for their proprietary platform aligned with their business philosophy.

Varda addressed a common criticism in the developer community regarding Cloudflare’s approach. He argued that contrary to a “popular theory” that the company made Cloudflare Workers work differently from other cloud platforms to create “lock-in,” the company believes “being open source and giving people an escape hatch is good business.” This sentiment underscores a strategic shift toward openness, even as the company consolidates control over the underlying runtime.

Ryan Dahl, who co-founded Deno alongside Bert Belder and is also the creator of Node.js, commented on the acquisition. Dahl wrote that his team is “joining Cloudflare to make the Workers programming model a mainstream way to build servers.” This statement signals an intent to move beyond the niche of edge-specific development and position Workers as a general-purpose server architecture.

The financial terms of the acquisition were not disclosed. However, Deno had previously raised a total of $26 million, including a Series A round led by Sequoia Capital. The acquisition effectively ends Deno’s independent existence as a venture-backed startup, integrating its technology and talent directly into Cloudflare’s engineering organization.

Context

Deno was originally created by Ryan Dahl as a successor to Node.js, aiming to fix perceived design flaws in the original runtime. It has since evolved into a full-stack web framework and runtime that emphasizes security and modern web standards. Cloudflare Workers, on the other hand, is a serverless platform that allows developers to run JavaScript and TypeScript code at the edge of the network, closer to the user. By acquiring Deno, Cloudflare is combining two distinct but complementary approaches to modern JavaScript execution: Deno’s local development and runtime capabilities with Cloudflare’s global distribution and edge infrastructure.

The relationship between the two projects has been symbiotic for some time. Deno’s runtime has been used in various Cloudflare projects, and the two teams have collaborated on standards and tooling. The launch of celld by Deno was a significant moment, as it demonstrated that the Workers model could be implemented outside of Cloudflare’s proprietary infrastructure. This open-source effort likely accelerated Cloudflare’s decision to acquire the startup, ensuring that the core runtime development remains aligned with their platform goals.

What it means for developers

For developers using Cloudflare Workers, this acquisition suggests a more integrated and potentially more stable development experience. With the Deno team now in-house, there may be improvements to the local development tooling, debugging, and testing capabilities for Workers applications. The emphasis on making Workers a “mainstream way to build servers” implies that Cloudflare will invest in making the platform more accessible to developers who are not currently using edge computing.

However, developers should be aware that the acquisition may lead to changes in the Deno runtime itself. As Deno becomes more tightly coupled with Cloudflare’s infrastructure, some of its standalone features or community-driven directions might shift. The open-source nature of celld remains, but the primary development focus will likely be on enhancing the Cloudflare Workers ecosystem.

What to watch

• Integration of Deno tooling: Look for updates to the Deno CLI and local development tools that are specifically optimized for Cloudflare Workers.
• celld development: Monitor the future of celld to see if it continues as an independent open-source project or if it becomes a testbed for new Workers features.
• Platform changes: Watch for any changes in the Cloudflare Workers API or deployment model that reflect the influence of the Deno team.
• Community response: Observe how the broader JavaScript community reacts to the acquisition, particularly regarding concerns about vendor lock-in and the future of open-source runtimes.