Evan Stites-Clayton is a General Partner and CTO at HF0, a San Francisco-based residency and venture fund that backs repeat technical founders building AI-native startups. He previously co-founded Teespring with Walker Williams at Brown University in 2011, scaling it from a $3,000 weekend experiment to over $1 billion in cumulative sales and $65 million raised from Andreessen Horowitz and Khosla Ventures before going through Y Combinator's W13 batch. Named to Forbes 30 Under 30, he joined HF0 in 2022 to help the next generation of builders compress the gap between idea and scale.
Will Yin is the co-founder and CEO of Mandolin, a San Francisco AI automation company building autonomous agents for specialty drug access. A Greenwich High School valedictorian and Stanford dropout, Yin previously co-founded Jupiter (YC-backed, $9M raised) before pivoting to healthcare. At Mandolin, he and co-founder Rohit Rustagi have raised $97M to automate the back-office workflows — prior auth, benefits verification, billing — that delay cancer and Alzheimer's patients from getting life-saving specialty therapies. Within months of launch, Mandolin deployed across 700+ clinics serving 250,000+ new patients annually.