Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education

Duolingo co-founder Severin Hacker explains how AI let the company build 148 courses in one year after taking 12 years to build the first 100.

• AI let Duolingo build 148 new courses in one year; the prior 100 took 12 years to produce.
• Duolingo uses Decagon for AI customer support, which handles 70-80% of tickets automatically.
• Video call with AI character Lily is locked to the highest-tier Max subscription due to real LLM API unit costs.
• Hacker argues the hardest part of language learning is motivation, not content — Duolingo is a motivation engine, not a curriculum engine.
• Series A was $3M at $15M valuation; Union Square Ventures was the only firm that did not require relocation to Silicon Valley.
• Hacker believes AI is overhyped for software engineering: LLMs degrade badly on large codebases and cannot reliably add features to existing code.
• Post-exit founders in a study said $100M is the wealth level where they stop worrying about money.

2025-05-19 · Watch on YouTube