TMTPOST -- Lucy Guo, co-founder of Scale AI, has officially become the world’s youngest self-made woman billionaire at just 30 years old. Her estimated net worth has surged to $1.25 billion following a recent tender offer that boosted Scale AI’s valuation to $25 billion. Guo launched Scale AI in 2016 alongside Alexandr Wang, who previously held the title of the world’s youngest self-made billionaire at age 24. Although Guo stepped away from the company in 2018, her retained equity has played a key role in her newfound billionaire status. Since her departure from Scale AI, Guo has gone on to launch Passes, a platform designed to help creators monetize their content. The startup raised $40 million in Series A funding in early 2024, with backing from high-profile investors across tech and media. Born in Fremont, California, to Chinese immigrant parents, Guo began teaching herself to code as a teenager. She enrolled at Carnegie Mellon University but left early after earning a Thiel Fellowship—an elite program that funds young entrepreneurs to build companies instead of pursuing traditional education. Guo’s rise is a testament to the transformative power of early-stage equity in high-growth startups, even for founders who part ways before their ventures reach peak valuation.