Lucy Guo, the 30-year-old Co-founder of Scale AI, is the world's richest self-made woman billionaire with a net worth of $1.25 billion. The daughter of Chinese immigrant parents, Lucy grew up in the US and began coding during her middle school. A Carnegie Mellon University dropout, she worked at Quora and Snapchat (now Snap) before co-founding Scale AI in 2016.