An airplane passenger photographed a business card. Bryan Leach saw a reason to leave the law. The Ibotta founder has spent the years since turning everyday purchases into a business built around evidence.
Steve Xu is a board-certified dermatologist turned medtech founder who runs Sibel Health, the Chicago company commercializing ICU-grade wearable sensors that now monitor patients in more than 20 countries. A physician-engineer trained at Rice, Harvard, and the London School of Economics, he splits his life between the clinic, the lab at Northwestern's Querrey Simpson Institute for Bioelectronics, and a startup chasing a single line: Better Health Data for All.