Extend your platform via custom code with Deno Subhosting
Hey all, Andy from the Deno team here. We're excited to share with you Deno Subhosting, an easy way to extend your platforms functionality by securely running untrusted JavaScript written by your users. When we first launched Deno Deploy in 2021, we were surprised at the volume of requests from companies about getting access to the APIs needed to run Deno Deploy. Many companies wanted to give their users the ability to write custom logic in their app, but setting this up in the cloud presents security concerns and a ton of infra work/maintenance. We realized that there was an…
In plain words
Deno Subhosting is a service that allows platform developers to safely run custom JavaScript code written by their users in the cloud. It handles the infrastructure and security concerns that come with executing untrusted user code, eliminating the need for companies to build and maintain their own systems. Designed for SaaS and platform companies, it lets users extend application functionality through custom logic without exposing the host system to security risks.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey all, Andy from the Deno team here. We're excited to share with you Deno Subhosting, an easy way to extend your platforms functionality by securely running untrusted JavaScript written by your users. When we first launched Deno Deploy in 2021, we were surprised at the volume of requests from companies about getting access to the APIs needed to run Deno Deploy. Many companies wanted to give their users the ability to write custom logic in their app, but setting this up in the cloud presents security concerns and a ton of infra work/maintenance. We realized that there was an opportunity for Subhosting to solve a larger problem, which is allowing companies to easily and securely run custom code written by their users, without the hassle of maintaining said infrastructure. Though we do have a few subhosting customers (Netlify being one of them), this launch makes our Subhosting product self-service, so any development team interested in extending their platform via their users' custom code can do so by signing up and reading our docs. We have an updated pricing model for Subhosting as well, including a generous free tier fit for kicking the tires and building a proof-of-concept. We'd love to get your feed back. Have you ever talked to your co-workers about allowing external devs to "have at it" with your platform? What would it look like to unlock the final 10% for your top customers? How have you approached this problem in the past? Thanks for reading and the Deno team will be responding to comments!
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