What happens when a college student builds an AI tool that goes viral overnight — and changes how thousands of students study?
Summary:
In this episode of Lobster Talks, Gabriel sits down with David Yu, co-founder of YouLearn — the YC-backed AI tutor that transforms PDFs, class recordings, and YouTube videos into quizzes, notes, and a personal tutor. From a dorm-room side project to a viral social growth engine, this episode is packed with tactics, conviction, and bold bets on the future of learning.
You’ll learn:
How YouLearn hit 10,000 users in 24 hours from a single post
The exact tactics they used to blow up on Instagram and TikTok
Why most AI tools in education fail — and how YouLearn avoids it
The truth about retention, virality, and real product usage
How David thinks about AI hallucinations and data safety
What learning could look like in 2030 with Neuralink, glasses, and beyond
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Chapters:
00:00 Viral Launch on Social Media
00:20 Introduction to YouLearn
00:47 Meet the Founder: David Yu
01:09 The Birth of YouLearn
02:37 Early Challenges and Successes
05:09 Going Viral Again
05:45 Handling Rapid Growth
08:14 Maintaining Motivation
10:53 The Importance of Co-Founders
12:00 Transition to Full-Time
15:30 Iterating on the Product
18:36 Joining Y Combinator
21:04 Investor Skepticism Towards YC
21:49 Misconceptions About Joining YC
22:33 Right and Wrong Reasons to Join YC
23:28 Maximizing YC Experience
25:08 Navigating YC with Existing Revenue
30:26 AI's Role in Education
31:48 Future of Learning with AI
34:05 Misconceptions About AI in Learning
35:10 The Evolution of Learning Tools
40:26 Final Thoughts and Future Prospects
🎧 Listen on the go:
Spotify: https://spoti.fi/4m2K7ah
Apple: https://apple.co/4cZ8RMm
My other YouTube Channel: https://www.youtube.com/@GJarrosson