When Jim McKelvey invented the Square card reader with Twitter Founder Jack Dorsey, he had no idea he was headed into a David vs. Goliath battle with Amazon that he would ultimately win!

On this episode, you will hear what drove Jim to make payment simpler, how he and the team conquered competition, and what he's up to next. After listening to the podcast, you can read more in Jim’s new book, The Innovation Stack.

Grey Interviewer: Kenny Gold, Executive Director, Social