Sara Horowitz (born January 13, 1963) is a founder of the Freelancers Union and a proponent of mutualism. She has been working for unions since age 18, when she held a summer internship at the International Ladies Garment Workers Union. She has worked for the UAW, CSEA, and SEIU, and she currently serves on the board of the Albert Shanker Institute. Under her direction, the Freelancers Union built a first-of-its-kind Portable Benefits Network in 2004 and launched the Freelancers Insurance Company in 2009, which provided health insurance to more than 25,000 New York freelancers before it was closed in 2014. In her work, Horowitz advocates for the role of mutualist organizations, including unions, cooperatives, mutual aid groups, and faith-based groups, as the foundation for the next labor e