TestSynthia is a living market simulation that lets you test product ideas, pricing, messaging, and features with 1M+ realistic AI personas, before you spend weeks building or thousands on real users. These personas have persistent memory, rich social context, and evolving opinions. They react like real humans remembering past interactions, responding to world events, and showing genuine objections or excitement. In just minutes, you get clear directional signals: Purchase intent scores, concept appeal ratings, feature demand, thematic insights, and segment breakdowns. Validate fast, kill…