Most validation tools measure intent. Market Physics measures adoption behavior. Submit your pitch → 12 stakeholder personas are generated → 10,000 synthetic agents simulate adoption across 12 market periods → you get an Idea Fitness Index, friction profile, and benchmark comparison against Airbnb, Uber, Stripe, and Slack. Grounded in Prospect Theory, Bass Diffusion, and network diffusion science. Free tier — 3 simulations, no credit card required.