
Founders in Arms Instacart's Max Mullen on Building Instacart and the Future of AI: First Live Founders in Arms
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Feb 10, 2026 Max Mullen, Instacart co-founder and long-time CPO, turned grocery logistics skepticism into a massive company. He recounts founding and scaling through timing, culture, M&A, and shifting founder roles. He also maps AI’s next frontier, predicting vertical agent-driven tools that boost professionals’ productivity.
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The Beer Delivery That Won YC
- Instacart missed YC's application deadline, then delivered beer to Gary Tan to demonstrate the product.
- That demo convinced Gary and led to their acceptance into Y Combinator.
Retailer Loyalty Was The Early Unlock
- Adding a popular retailer catalog unlocked product-market fit because customers strongly prefer favorite stores.
- Treating Instacart as a multi-retailer marketplace scaled demand quickly.
Shift Roles As You Scale
- As companies scale, move from generalist roles to specialist owners for high-leverage projects.
- Founders should focus on culture and unique strategic projects they can personally drive.
