Cassie Brown is the founder and CEO of Smart City Locating, Inc., an apartment locating company that offers its services in Dallas, Austin and Houston. She founded the company in 2013, and has grown it to 139 employees. In 2018 the company made $13 million in revenue, up from 2015 when it made $1.75 million. Smart City has consistently doubled in revenue every year — and Brown and her team have done it without any investments.