TestSynthia: Test your product in a simulation. Sell it in the real world

Most founders validate by launching. That's expensive. Synthia is a living market simulation — 1M+ AI personas with persistent memory, social context, and evolving opinions. Test your idea in 10 minutes before the real world gets a vote.

Framer — Launch websites with enterprise needs at startup speeds.

Launch websites with enterprise needs at startup speeds.

Hey PH! 👋 Nikhil here, solo founder and builder of Synthia. I built this because I kept watching smart founders spend months building things nobody wanted. Not because they were bad at building because they validated by launching. The real world charges full price for wrong answers. TestSynthia is the step before that. A living market simulation where 1M+ AI personas — with persistent memory, social context, and evolving opinions — react to your idea before a single real user sees it. Two things I'd love you to try right now: → testsynthia.com/analysis — real simulation output, see what you'd actually get → testsynthia.com/live-simulation — watch personas talking to each other in real time. This is the thing that makes people go "wait, this is real?" Ask me anything — about the product, the tech, how the simulation works, or what I've learned building this solo for 3 months. I read and reply to every comment. 🙏