Sierra Interactive | 4,358 followers on LinkedIn. The most powerful end-to-end real estate platform available with IDX websites, back-end CRM and lead gen services. | Sierra Interactive develops residential real estate software and services for agents, teams and brokers in the U.S. and Canada. Sierra’s proven lead generation and management solutions are trusted by top-performing teams and influential coaches in the real estate industry. Founded in 2007, Sierra is headquartered in Louisville, KY, but has a remote-first workforce across the U.S.