Advertising on the internet’s largest commercial real estate network allows you to cast a net wider than any other advertising channel, and close deals faster by capturing the attention of principals and tenants. CoStar Group is the #1 provider of information, analytics and marketing services to the commercial property industry in the United States, Canada, the United Kingdom, France, Germany, and Spain. Founded in 1987 by Andrew Florance, the company has grown to include many online marketplaces, including Apartments.com, LoopNet, and BizBuySell.