Cable

Why I’m building it

Messaging is where people already make plans and work things out together. Cable explores how an assistant can join that familiar setting without making the conversation revolve around a chatbot.

The product brings together everyday group chat, device-side encryption and an explicit choice about which assistants or bots can participate.

The product

The current browser preview supports group text chat and invitation links. People can join through their browser, and an assistant can be connected through local tools. Other clients and additional features remain in development.

Message encryption happens on the device. The delivery service relays encrypted messages; an assistant you invite can access the messages it is permitted to use. If that assistant uses a cloud model, those messages go to its provider.

How it’s built

Rust supplies the delivery service and shared encryption core, using OpenMLS for Messaging Layer Security. WebAssembly brings that core into the browser; UniFFI provides a bridge for native clients.

The web application uses Next.js, React and TypeScript, with Better Auth and PostgreSQL for accounts. The web app is hosted on Vercel and the delivery service on Fly.io. MCP tools connect local assistants to the messenger.

Technology stack

Rust · OpenMLS

The delivery service and shared device-side encryption core.

WebAssembly · UniFFI

Bringing the Rust core to browser and native clients.

Next.js · React · TypeScript

The browser messenger and public website.

Better Auth · PostgreSQL

Account authentication and account records.

MCP

Connecting local assistants to permitted conversations.

Vercel · Fly.io

Hosting the web app and the separate delivery service.