Neuron

Neuron runs your Figma flow through 5 synthetic personas — First-Timer, Power User, Accessibility, Distracted, and Skeptic — and walks it frame by frame the way a real user would, remembering how fatigued or frustrated they get by the last screen.

Every finding is grounded in a named UX law or heuristic (Miller's Law, Hick's Law, Nielsen's 10 Heuristics, and more) — never a vague "this feels off." Each analysis produces a scored diagnosis with a friction gauge, emotional-response tracking, prioritized issues, and one-tap fixes you can post straight to your canvas as sticky notes.

Also included: side-by-side A/B flow comparison, bulk analysis across multiple frames and personas at once, and a full WCAG 2.1 accessibility audit mode.

Requires your own free Groq API key (console.groq.com) — Neuron's price covers the tool itself; AI inference runs on your own key, so there's no subscription markup on top.