Vincere: Voice-first AI negotiation simulator with real-time coaching

Hey Product Hunt! 👋 Most people prepare for negotiations by reading books or watching YouTube — and then freeze when the real conversation gets tense. We built Vincere because the only way to actually get better at negotiating is to do it. Out loud. Under pressure. Against something that pushes back. Vincere gives you a voice-first AI counterpart that responds dynamically to your exact words — not a script. It expresses frustration, anchors hard, and adapts to how you handle pressure. After each session, you're scored across four dimensions: Technique, Composure, Outcome, and Rapport — with granular breakdowns so you know precisely where you won ground and where you left it. We've built 18 scenarios from the ground up: salary negotiations, SaaS sales closes, VC term sheets, ransomware extortion, hostile takeovers, lease renewals, and more. Each one is built around real-world pressure dynamics and frameworks from Harvard's Getting to Yes, HBS Negotiation Genius, and Cialdini's Influence. Would love your feedback — especially from anyone who's walked into a high-stakes conversation and wished they'd practiced more first.