Standard Media Index (SMI) is a privately held ad spend and pricing intelligence company founded in 2009 and headquartered in New York City. It provides data and insights on advertising spending and pricing across various media channels, including TV, digital, print, and out-of-home. SMI collects and analyzes data from media companies, agencies, and advertisers to offer clients insights into market trends, competitive benchmarking, and media valuation. The company has over 100 employees and is a subsidiary of Guideline.