Zach Yadegari

Zach Yadegari is a 19-year-old entrepreneur and the founder of Cal AI, an AI-powered nutrition tracking app that lets users log their meals by simply taking a photo. His entrepreneurial journey began at age 7, when he taught himself to code. He was building and selling online ventures before he was a teenager. At 17, Zach co-founded Cal AI during his senior year of high school. In under two years, he scaled the company to 15 million users and $30 million in ARR, a trajectory that caught the attention of one of the most recognized names in health and fitness. In December 2025, Cal AI was acquired by MyFitnessPal. Before Cal AI, Zach founded Totally Science, a gaming platform that drew over 5 million users during the COVID-19 pandemic and sold for a six-figure sum at age 16. Zach is one of the youngest founders to lead a successful exit in the consumer health tech space.