Activist and entrepreneur Yale Fox is the CEO of Rentlogic, a rental search engine that connects to New York City government databases to rate landlords and buildings. He works with cities and communities to put power back into the hands of tenants and to show how open data can serve the publics interest. Previously, he turned a nightclub into a sociological research lab: a big data analysis earning him a TED Fellowship. Yales Rentlogic works with the City of New York to analyze millions of building inspection records and rank each building based on quality. Their listings include additional information that most renters wouldnt know about until its too latelike mold, heat and hot water problems, rodents, cockroaches, broken elevators, unexpected rent increases, or if the landlord has a tendency to keep the security depositall so that renters can be fully informed before signing a lease. Hes also the director of LandlordWatch, a website that combines citizen-journalism, housing activism, and problem solving with social technologies. LandlordWatch uses open government data provided by the City of Toronto respecting building inspections in order to create transparency in the rental housing market.