Instacart Co-founder Max Mullen on Building a $10B Consumer Marketplace | Ep. 47

Max Mullen is the co-founder of Instacart and an active investor having invested in 100+ companies including Gumloop, Mercury, Owner among others. He also runs a founder community in San Francisco called Workshop. We discussed the full arc of building Instacart from a contrarian idea that investors rejected to a $10B consumer marketplace. Max highlighted the scrappy early days, marketplace product-market fit, and key inflection points like retailer partnerships and the Amazon–Whole Foods moment. We also explored what makes great consumer founders, why the best ideas look wrong at first, and how to build and scale in “hard mode” markets. Finally, the conversation touched on investing, decision-making frameworks, and what it takes to win in consumer over the long term. Timestamps: (0:00) Intro (0:36) The inception of Instacart (4:55) Finding product market fit (7:20) Landing Trader Joe’s (11:04) Big levers for growth (13:36) Operationally complex businesses (14:55) Amazon’s acquisition of Whole Foods (17:50) COVID and Instacart’s IPO (20:02) Prioritizing profitability (23:21) Avoiding temptations (24:59) The future of Instacart (25:53) Investing in consumer (28:21) Irrationally optimistic founders (29:49) B2B vs consumer founders (30:35) How to work with investors (33:38) Building Workshop Links: https://x.com/Max https://x.com/jaltma https://maxmullen.com/ https://uncappedpod.com/ friends@uncappedpod.com

Max MullenguestJack Altmanhost

Apr 16, 202635mWatch on YouTube ↗

EPISODE INFO

Released: April 16, 2026
Duration: 35m
Channel: Uncapped with Jack Altman
Watch on YouTube: ▶ Open ↗

EPISODE DESCRIPTION

Max Mullen is the co-founder of Instacart and an active investor having invested in 100+ companies including Gumloop, Mercury, Owner among others. He also runs a founder community in San Francisco called Workshop. We discussed the full arc of building Instacart from a contrarian idea that investors rejected to a $10B consumer marketplace. Max highlighted the scrappy early days, marketplace product-market fit, and key inflection points like retailer partnerships and the Amazon–Whole Foods moment. We also explored what makes great consumer founders, why the best ideas look wrong at first, and how to build and scale in “hard mode” markets. Finally, the conversation touched on investing, decision-making frameworks, and what it takes to win in consumer over the long term. Timestamps: (0:00) Intro (0:36) The inception of Instacart (4:55) Finding product market fit (7:20) Landing Trader Joe’s (11:04) Big levers for growth (13:36) Operationally complex businesses (14:55) Amazon’s acquisition of Whole Foods (17:50) COVID and Instacart’s IPO (20:02) Prioritizing profitability (23:21) Avoiding temptations (24:59) The future of Instacart (25:53) Investing in consumer (28:21) Irrationally optimistic founders (29:49) B2B vs consumer founders (30:35) How to work with investors (33:38) Building Workshop Links: https://x.com/Max https://x.com/jaltma https://maxmullen.com/ https://uncappedpod.com/ friends@uncappedpod.com

SPEAKERS

Max Mullen
guest
Co-founder of Instacart, a consumer grocery delivery marketplace; later involved in Instacart AI initiatives and early-stage investing.
Jack Altman
host
Host of "Uncapped" and startup founder/investor who interviews tech founders.

EPISODE SUMMARY

In this episode of Uncapped with Jack Altman, featuring Max Mullen and Jack Altman, Instacart Co-founder Max Mullen on Building a $10B Consumer Marketplace | Ep. 47 explores max Mullen on Instacart’s hard-mode growth, resilience, and investing lens Instacart began as a contrarian bet that grocery delivery could work post-Webvan due to smartphones, higher e-commerce adoption, and using existing stores as warehouses.

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