🚧 This documentation is not complete yet as Lagon is in Alpha.

Lagon is an open-source runtime and platform that allows developers to run TypeScript and JavaScript Serverless Functions close to users.

Lagon is in Alpha. Get access to Lagon Cloud via the waitlist (opens in a new tab)

Current status:

  • Dev: In heavy development, features are being added and APIs have breaking changes
  • Alpha: Missing features and bugs to fix, progressive access to Lagon Cloud (waitlist (opens in a new tab))
  • Beta: Stable APIs, last features are being added, Lagon Cloud available without a waitlist
  • General Availability: Cloud and self-hosted versions available for production usage


  • JavaScript Runtime written in Rust using V8 Isolates
  • Native Web APIs like Request, Response...
  • 100% open-source
  • Deploy APIs, SSR(ed) websites, Webhooks endpoints, Cron jobs...
  • CLI to manage Functions and develop locally
  • Deploy at the Edge using the Cloud version, or self-host it


The roadmap is accessible to anyone on GitHub. Feel free to open an issue to discuss new features that you would like to see implemented.

See the roadmap on GitHub (opens in a new tab)

How it works

Lagon uses V8 Isolates, which are sandboxed environments used to run plain JavaScript. That means each Function's memory is isolated from each others, and you can run a lot of them at the same time with very few resources. Node.js (opens in a new tab), Electron (opens in a new tab), Deno (opens in a new tab) (and Deno Deploy (opens in a new tab)), Cloudflare Workers (opens in a new tab) are also using V8 Isolates to execute JavaScript.

Starting an Isolate is a lot faster than starting a whole Node.js process, which allows for almost free cold starts.

Sponsors ❤️

Thanks a lot to every current and past sponsor!

Sponsors list