The canvas

Sketch. Branch. Ship.

Prototyper is the infinite surface where designers, agents, and your existing Claude Code or Codex subscription share one room. Sketch a screen, branch into three variants, find the one yes hiding among a thousand no's.

Start free Read the manifesto

Pictures don't ship.

On the canvas, every shape is context. And every context becomes code.

Sketch becomes shape.
Drop a sketch, screenshot, sticky, or brief on the canvas. The agents read every shape as context — they don't just produce, they consume.
See sketch reading
Three takes, one canvas.
Fork a design into three directions. Keep all of them visible at once — no tabs, no lost state. Pick the yes; archive the nos without deleting them.
See branching
The room is multiplayer.
Cursors for the humans, ghosts for the agents, one set of files underneath. Your team and the Claude Code you already pay for, working the same surface.
See multiplayer

Many hands

Multiplayer for agents — and the people behind them.

Drop in your teammates, the in-house Prototyper agents, and the Claude Code or Codex you already pay for. They all work the same surface, in real time, visible to each other. The cursor next to you might be an agent. That's the point.

The hero demo isn't a video. Every cursor, sticky, and shape up there is real product UI rendering live.

Context lives on the canvas

Drop anything in. They read it.

Briefs, screenshots, sticky notes, half-built apps — everything you put on the canvas becomes context the agents can read. They don't just produce shapes. They consume them.

Branch, don't commit

Three takes side by side. Pick the one yes.

Fork a design into three directions and keep all of them visible at once. No tabs to flip through, no state to remember. Pick the yes; archive the nos without deleting them. Hold every option until one of them earns the canvas.

Sketch in. Code out.

The hand-drawn wireframe is the brief.

Drop a sketch on the canvas and the agent reads it like any other shape. It traces the strokes, infers the hierarchy, and ships the matching component — same layout, real code, your tokens.

Open a canvas. See what's hiding.

Sketch a flow, drop in a screenshot, or describe a feature. The agent builds it on the canvas — branch, compare, ship the one yes.

Start free