The Prototype

Build 3D prototypes in your browser — alone or together.

Peer-to-peer, no account, no server holding your scene. Free and open source.

A collaborative 3D editor that runs entirely in the browser. Drop in primitives or your own models, wire up behaviour in a node graph, turn on physics, and walk through the result in VR — then send someone your peer ID and they are editing the same scene with you, in real time.

There is no backend. Sessions run over a peerjs mesh: a signalling server introduces peers, then everything — objects, node graphs, voice, cursors, files — travels directly between browsers. Nothing about your scene touches our servers, and you can point the app at your own signalling server or self-host the whole thing.

Everything you need to build, collaborate and self-host is in core, under MIT, with no feature gates. An optional hosted tier (accounts, room listing, roles) plugs into a small set of documented seams — a capability gate, an auth hook and a plugin URL. With no plugin loaded, the open-source build behaves byte-identically. The contract lives in OPEN-CORE.md.

• Try it — theprototype.app, nothing to install, no sign-up
• Read the docs — docs.theprototype.app
• File something — issues on core
• Write a module — MODULES.md
• Watch it in action — video playlist

Sponsoring helps pay for the signalling and relay servers that keep public sessions connecting. Starring the repo and telling someone about it helps just as much.