Book Jack Dorsey

Jack Dorsey is an American technology entrepreneur best known as a co-founder of Twitter and of the financial technology company Block, Inc., the parent of Square, Cash App, Afterpay, Bitkey and Tidal. Dorsey served as Twitter's first chief executive when the company launched in 2007, guiding the young startup through early venture funding rounds while prioritizing reliability as the service exploded in popularity. He later moved into the role of chairman before returning to the CEO seat, and he co-founded Block, home to Square and Cash App. He has described simplicity, constraint and craftsmanship as the principles that guide his work as a builder. Dorsey was also involved in founding the social network Bluesky and the Omacom Foundation. As a speaker, he offers a rare inside perspective on launching a platform that reshaped global communication, scaling consumer fintech products used by millions, and thinking about the future of social media, payments and the internet.