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Charis Zhang

Charis Zhang

Founder building AI-native addiction clinic Grata Health

charis
San Francisco, California
Joined January 2026

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Summary

Charis Zhang is a young, serial entrepreneur focused on leveraging AI to build innovative solutions. He has co-founded multiple companies, including Rizz! (an AI dating tool with over 500,000 users that he later sold), and is currently the CEO of Grata Health, an AI-native addiction clinic. charisz+2
Despite dropping out of the University of California, Berkeley, where he studied Computer Science and Cognitive Science, Charis has demonstrated a strong entrepreneurial drive from a young age. He built a marketing agency that managed $15 million in ad spend before even enrolling in college and has since secured significant funding for his ventures, such as a $1.2M check from The House Fund for Grata Health. charisz+3
Charis is actively involved in the startup ecosystem, having participated in Z Fellows and served as CTO at Stiddle, where he focused on building infrastructure for cookieless marketing. His social media presence reflects his philosophical musings and dedication to building world-class teams. charisz+2

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Shares philosophical thoughts and observations on life and business on social media. nitter