WHOSAY | 3,622 followers on LinkedIn. WHOSAY is the brand-trusted influence marketer​ and a ViacomCBS company | WHOSAY is Viacom's brand-trusted influence marketer. WHOSAY powers marketing campaigns for brands across all verticals, utilizing every level of celebrity and influencer, and delivering measurably superior results to other mobile and social advertising. Founded in 2010, WHOSAY is built from the best of entertainment, technology and advertising.