Guideline is a media intelligence and planning company that combines actual, buy-side ad spend and pricing data with advanced machine learning to deliver real-time market insights for advertisers, agencies, and media owners. Our tools help clients ditch static spreadsheets and fragmented workflows in favor of data-driven decision making, precise spend optimization, and forward-looking trend analysis. Trusted by top global brands, agencies, and media buyers, Guideline aims to redefine how the world buys and sells media—making transparency, accuracy, and speed the new standard.