Hang

Real-time communication platform built on Media over QUIC.

Try it at hang.live.

Architecture

Hang combines a closed-source application layer with an open-source media streaming library:

• app — Web frontend built with SolidJS, Vite, and Tailwind CSS v4
• api — Backend running on Cloudflare Workers with Hono and Drizzle ORM
• native — Desktop/mobile app using Tauri v2
• moq — Open-source media streaming library using WebTransport and QUIC (git submodule)

The frontend and backend share types via Hono RPC. Real-time media is streamed over WebTransport using the MOQ protocol, handled by the moq/ submodule.

Project Structure

app/        Web frontend (SolidJS + Vite)
api/        Backend API (Cloudflare Workers + Hono)
native/     Desktop/mobile app (Tauri v2)
moq/        Media over QUIC libraries (git submodule → github.com/kixelated/moq)

Prerequisites

Required:

• bun — package manager and runtime
• just — command runner
• Rust — for the native app and MOQ relay

Recommended:

• Nix + direnv — handles all dependencies automatically via flake.nix

Getting Started

Clone the repo with submodules:

git clone --recurse-submodules https://github.com/moq-dev/hang.live.git
cd hang.live

With Nix + direnv (recommended):

direnv allow
just dev

Without Nix:

bun install
just dev

just dev starts three services concurrently:

• api — Cloudflare Workers dev server (via wrangler)
• app — Vite dev server on port 1420
• moq — MOQ relay server

Commands

Command	Description
just dev	Run all dev servers
just check	Run linting and type checks
just fix	Auto-fix formatting and lint issues
just build	Build all packages
just deploy <env>	Deploy API and app to Cloudflare
just native	Run the native desktop app

MOQ (Media over QUIC)

The moq/ directory is a git submodule containing moq — an open-source library for real-time media streaming over WebTransport and QUIC. It provides the protocol implementation and relay server that Hang uses for low-latency audio/video delivery. See the moq README and moq.dev for full documentation.

License

Dual-licensed under MIT or Apache 2.0, at your option.