The Marauder's Map

Dennis Crowley read Harry Potter and decided someone needed to build the Marauder's Map for New York, a way to see where your friends are in real life. Twenty-five years and three companies later, he's still chasing that idea: Dodgeball (texting your location, pre-iPhone, bought and slowly killed by Google), Foursquare (sixty million users, then Instagram changed what people wanted from the internet), and now Hopscotch Labs, building the same thing for AirPods. We talk about why he left Foursquare after thirteen years as CEO, what happened inside Google post-acquisition, and why he keeps returning to the same idea instead of starting ove