Episode 048
Lenny's Podcast | Slack founder: Mental models for building products people love ft. Stewart Butterfield
Stewart Butterfield is the co-founder of Slack and Flickr, two of the most influential products in internet history. After selling Slack to Salesforce in one of tech's biggest acquisitions, he's been focused on family, philanthropy, and creative projects. In this rare podcast appearance, Stewart shares the product frameworks and leadership principles that most contributed to his success. From utility curves to the owner's delusion to hyper-realistic work-like activities, his thoughts on craft, strategy, and leadership apply to anyone building products or leading teams.
Nov 27, 2025