Hey Product Hunt, Shivang here, Co-founder of Lumina. I built Lumina because most marketing and product decisions are still made the same way they were 10 years ago: 1) Launch first 2) Spend money 3) Hope it works 4) Explain later why it didn’t Real user research is slow, expensive, and hard to scale — so teams end up guessing. Lumina lets you simulate real audiences before you launch. It’s an AI-powered audience simulation platform where you can test ads, messaging, landing pages, emails, or product ideas against thousands of realistic AI personas that behave like real people — before you spend a single dollar. The core belief is simple: If you can predict human reaction early, you avoid expensive mistakes later. What Lumina does differently: Audience Simulation, Not Surveys You don’t get generic feedback. You get simulated people reacting, deciding, hesitating, and converting — like real users would. Test Before Reality Upload your creatives, copy, or ideas and see how different audiences respond before going live. Instant Insights No recruitment, no weeks of waiting. Lumina gives you sentiment, engagement signals, objections, and decision patterns in minutes. Built for Marketers & Builders Performance marketers, product teams, agencies — anyone tired of burning budget just to “see what happens.” Lumina was built in tight loops with early users who were frustrated by failed launches, unclear messaging, and expensive experiments. Every feature exists to answer one question faster: “How will real people react?”