Deno Subhosting

Don’t let customer code become a security nightmare

Deno Subhosting lets you run untrusted JavaScript from multiple customers in a secure, hosted sandbox.

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Trusted by

Global scale

10B+

Requests processed monthly

World-class reliability

“We chose Deno to power Netlify Edge Functions because it's optimized for performance and doesn’t force proprietary APIs onto our users.”

Mathias Biilmann - CEO, Netlify

Effortless security

Have full peace of mind when running untrusted code from multiple customers. Deno subhosting is built with multiple layers of security, including the protections of Google’s V8, Rust and Linux containers.

Learn more about security and tenant isolation

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User code is completely isolated from both your internal system and other users’ data.

Define which web services can be accessed by your user’s code.

Set limits on CPU usage for user requests.

Ensure that only authenticated systems can invoke functions defined by your users.

Your infrastructure

Deno infrastructure

Linux namespace

Process boundaries

V8 sandboxing

User 1 code

User 2 code

User 3 code

A seamless experience for your users

Empower your users to get the most out of your product, with a simple, integrated developer experience.

Your app

Embedded code editor ↩️

addEventListener("fetch", (e) => {
  e.respondWith(new Response("Hello World"));
});

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By strictly adhering to JavaScript and browser standards, your users don’t need to learn any proprietary languages or APIs. They don't even need to know anything about Deno.

Whether your users want to easily write and run their own edge functions or connect services and APIs with a “low code” approach, Deno Subhosting enables them to do so without ever leaving your product or configuring a single server.

User code can import npm modules while still running quickly at the edge.

Simple setup that scales automatically

Save months of engineering effort in setting up a custom hosting solution and get back to focusing on the features that matter most for your users.

Easy setup

Just send code to our API and it'll be ready to run in seconds.

Serverless Scaling

No need to update your infrastructure as you grow. Deno subhosting automatically scales with your volume, and you only pay for what you use.

User Analytics API

Get insights into your users' usage so you can bill them accurately and efficiently (if you choose to).

Subhosting vs. AWS Lambda

	Subhosting	AWS Lambda
Deployment & code management	Yes	Build your own
Tenant isolation	Yes	Build your own
Global deployment	Yes	Regional

Learn more on our blog

Using Deno Subhosting vs. AWS Lambda to Run Untrusted User Code

How security and tenant isolation allows Deno Subhosting to run untrusted code securely

Built for speed and reliability

Backed by a global network of on-demand V8 isolates.

Global Edge Network

Your users’ code runs fast everywhere. With 25 points of presence worldwide, our isolate cloud can be accessed with low-latency from anywhere on Earth.