Biz Stone, born Christopher Isaac Stone, is an American entrepreneur and computer scientist, best known as one of the co-founders of Twitter. His career in the technology sector took a decisive turn in 2006 with the creation of the microblogging platform, where he served as Creative Director, contributing significantly to defining the service's identity and user experience. After leaving his active role at Twitter, Stone continued his entrepreneurial activities by co-founding the online publishing platform Medium in 2012, along with Evan Williams, and later the social search app Jelly. For his innovative impact, he has received numerous accolades, including the title of "Entrepreneur of the Decade" by Inc. magazine and being named, along with the other co-founders, to Time's list of the 100 most influential people in the world. He is also an active startup investor and a supporter of philanthropic initiatives.