Deno

Deno is the company behind the open-source Deno runtime for JavaScript and TypeScript. The runtime is described on its site as Node-compatible, with built-in TypeScript support and bundled tools including a package manager, test runner and linter. Its other products include Deno Deploy, a commercial serverless hosting service; JSR, an open-source package registry built around TypeScript and ES modules; Fresh, an open-source web framework; Deno Sandbox, a commercial service for running untrusted code in isolated Linux virtual machines, aimed at AI agents; and Subhosting, which lets platforms build on Deno Deploy's infrastructure. Deno for Enterprise offers paid support for organisations running the runtime.

The site reports more than 100,000 stars on GitHub and over 400,000 monthly active users, and shows logos of teams that use it, among them Slack, Netlify, GitHub, Supabase, Salesforce, Spotify, Stripe, Bank of America and Tencent.

On 9 October 2026 Deno announced that its whole team is joining Cloudflare. According to the post, Cloudflare will support the runtime for one more year with monthly bug and security releases, after which development ends while the project stays open source. Deno Deploy will run for six months before closing, with migration help for paying customers moving to Cloudflare Workers. JSR will keep operating, with its infrastructure moving to Cloudflare.