37:43Billion-Dollar Unpopular Startup Ideas
From Y Combinator · Published Oct 23, 2025 · Watch on YouTube
TL;DR
The video argues that after roughly a two-year window of easy AI startup ideas, competition has returned, making it critical to pursue contrarian, non-obvious bets that feel dangerous or scary. Founders should think from first principles, find what humans desperately want, and be willing to operate in gray areas where laws were written before major tech shifts.
Key insights
- Competition is back after a ~2‑year AI gold rush; the easy vertical‑AI ideas are now crowded, and no major model step function has occurred recently to create new greenfield.
- Non-obvious ideas feel “dangerous and scary” — founders worry about wasting years or doing something illegal.
- Many successful startups entered spaces with numerous previous failures (“dead bodies stacked up”), betting that a new capability (e.g., AI, smartphones) changes the equation.
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