The co-founder of Twitter who later created Block, Inc. is Jack Dorsey.
Jack Dorsey is an American entrepreneur and computer programmer who is best known as the co-founder of Twitter. He was born on November 19, 1976, in St. Louis, Missouri, and grew up in a Catholic family. Dorsey showed an early interest in computers and programming, and he began writing code when he was just a teenager.
In 2006, Dorsey co-founded Twitter along with Biz Stone and Evan Williams. Twitter quickly became one of the most popular social networking platforms in the world, with millions of users sending tweets every day. Dorsey served as CEO of Twitter from its founding until 2008, when he was ousted from the company.
After leaving Twitter, Dorsey went on to found several other companies, including Square, a mobile payment system, and Block, Inc., a blockchain technology company. In addition to his work in the tech industry, Dorsey is also known for his interest in meditation, mindfulness, and other spiritual practices.