Watsi is a non-profit crowdsourcing platform that enables anyone to fund life-changing medical procedures for patients in developing countries who might not otherwise have access to healthcare. At the time this case study was written, 22,102 Watsi donors had funded healthcare for 11,559 patients in 25 countries. Patients waiting to be fully funded included Vehn, a farmer from Cambodia who needs a hip replacement, Olga, a single mother from Guatemala who needs treatment for diabetes, and Dah Htoo, a 2 year old boy from Burma who needs surgery to repair burn damage. When Watsi founder Chase Adam was a Peace Corps volunteer, he was traveling through a small town in Costa Rica when a woman boarded the bus. Her son required medical treatment she could not afford; she showed his medical records and asked passengers for money to help pay for his treatment. The town was called Watsi and the idea of developing a platform to crowdsource funding for vital health care in developing countries was born. Soon after the platform launched, the idea gained traction on Hacker News, and eventually led to Watsi being the first non-profit startup funded and accelerated by Y Combinator.