How I Built This with Guy Raz

Zocdoc: Oliver Kharraz

In 2007, two friends set out to address a common frustration: the long waits and scheduling hassles of booking a doctor's appointment. But soon after launching their online scheduling platform Zocdoc, Oliver Kharraz and Cyrus Massoumi ran into a classic chicken-and-egg problem: they had to show potential patients that doctors were available for bookings…