Doom

What is Doom and what is it for?

Doom is a video messaging app for holding calls between two computers, built as a decentralised alternative to the familiar group-call tools it is nicknamed after. It uses Holochain to introduce the two callers to each other and WebRTC to stream the video directly between them, so the conversation itself does not pass through a central service.

Doom was built by the developer who publishes on GitHub as felri, as a proof of concept shared with the Holochain developer community. A post on the Holochain blog describes a working peer-to-peer video chat assembled over a handful of evenings, and the repository presents Doom as a work in progress rather than a finished product.

The app is for two people who want to see and hear each other without a company in the middle brokering the call. Holochain handles the introduction between the two computers — finding the other person and passing along what they need in order to connect — and WebRTC, the video technology already built into browsers, then streams the picture and sound directly between them.

In the flow the repository walks through, one person creates a room with a name such as Daily, a second person joins that room, and the two are introduced and connected. The README explains each step, links a downloadable macOS build, and points to build instructions for running Doom on Windows or Linux from source.

From 5 public sources, checked 23 September 2026.