In our 17-criterion evaluation of marketing service providers, we identified the 10 most significant ones — Accenture, Deloitte, Dentsu, Havas Group, IPG, Media.Monks, Omnicom Group, Publicis Groupe, Stagwell, and WPP — and researched, analyzed, and scored them. This report shows how each provider measures up and helps chief marketing officers and B2C marketing professionals select the right one for their needs.