How to find hidden growth opportunities in your product | Albert Cheng (Duolingo, Grammarly, Chess.com)

Hosted byLenny Rachitsky

Albert Cheng has led growth at three of the world’s most successful consumer subscription companies: Duolingo, Grammarly, and Chess.com. A former Google product manager (and serious pianist!), Albert developed a unique approach to finding and scaling growth opportunities through rapid experimentation and deep user psychology. His teams run 1,000 experiments a year, discovering counterintuitive insights that have driven tens of millions in revenue.
What you’ll learn:

• How to use the explore-exploit framework to find new growth opportunities
• How showing premium features to free users doubled Grammarly’s upgrades to paid plans
• What good retention looks like for a consumer subscription app
• Why resurrected users drive 80% of mature product growth
• Why “reverse trials” work better than time-based trials
• The three pillars of successful gamification: core loop, metagame, and profile

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Where to find Albert Cheng:

• X: https://x.com/albertc248
• LinkedIn: https://www.linkedin.com/in/albertcheng1/
• Chess.com: https://www.chess.com/member/Goniners

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Where to find Lenny:

• Newsletter: https://www.lennysnewsletter.com
• X: https://twitter.com/lennysan
• LinkedIn: https://www.linkedin.com/in/lennyrachitsky/

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Referenced:

• How Duolingo reignited user growth: https://www.lennysnewsletter.com/p/how-duolingo-reignited-user-growth
• Inside ChatGPT: The fastest-growing product in history | Nick Turley (Head of ChatGPT at OpenAI): https://www.lennysnewsletter.com/p/inside-chatgpt-nick-turley
• Explore vs. Exploit: https://brianbalfour.com/quick-takes/explore-vs-exploit
• Grammarly: https://www.grammarly.com/
• Reforge: https://www.reforge.com/
• Chess.com: https://www.chess.com/
• Everyone’s an engineer now: Inside v0’s mission to create a hundred million builders | Guillermo Rauch (founder & CEO of Vercel, creators of v0 and Next.js): https://www.lennysnewsletter.com/p/everyones-an-engineer-now-guillermo-rauch
• Building Lovable: $10M ARR in 60 days with 15 people | Anton Osika (CEO and co-founder): https://www.lennysnewsletter.com/p/building-lovable-anton-osika
• Figma: https://www.figma.com/
• Cursor: https://cursor.com/
• The rise of Cursor: The $300M ARR AI tool that engineers can’t stop using | Michael Truell (co-founder and CEO): https://www.lennysnewsletter.com/p/the-rise-of-cursor-michael-truell
• Claude Code: https://www.anthropic.com/claude-code
• GitHub Copilot: https://github.com/features/copilot
• Noam Lovinsky on LinkedIn: https://www.linkedin.com/in/noaml/
• The happiness and pain of product management | Noam Lovinsky (Grammarly, Facebook, YouTube, Thumbtack): https://www.lennysnewsletter.com/p/the-happiness-and-pain-of-product
• Kyla Siedband on LinkedIn: https://www.linkedin.com/in/kylasiedband/
• The Duolingo handbook: https://blog.duolingo.com/handbook/
• Lenny’s post on X about the Duolingo handbook: https://x.com/lennysan/status/1889008405584683091
• The rituals of great teams | Shishir Mehrotra of Coda, YouTube, Microsoft: https://www.lennysnewsletter.com/p/the-rituals-of-great-teams-shishir
• Duolingo on TikTok: https://www.tiktok.com/@duolingo
• Kasparov vs. Deep Blue | The Match That Changed History: https://www.chess.com/article/view/deep-blue-kasparov-chess
• Magnus Carlsen: https://en.wikipedia.org/wiki/Magnus_Carlsen
• Elo rating system: https://www.chess.com/terms/elo-rating-chess
• Stockfish: https://en.wikipedia.org/wiki/Stockfish_(chess)
• AlphaGo on Prime Video: https://www.primevideo.com/detail/AlphaGo/0KNQHKKDAOE8OCYKQS9WSSDYN0
• Statsig: https://www.statsig.com/
• The State of Product in 2026: Navigating Change, Challenge, an