LoopNet is an online marketplace for commercial property, providing property listings and marketing solutions for property owners. Founded in 1995 by Dennis DeAndre in San Francisco, the company initially focused exclusively on providing an internet platform for commercial property listings but has since expanded to offer a comprehensive suite of digital solutions for the commercial real estate industry. As of 2025, LoopNet is considered the leading commercial real estate digital marketplace, with more than 12 million unique monthly visitors. Today, LoopNet operates as a subsidiary of CoStar Group, which acquired the company in 2012 for approximately $860 million. The company is currently led by CEO Andrew Florence.