The AI answer we saw
For full-service brand strategy and media buying at a multinational scale, the leading options include WPP's GroupM (the world's largest media investment group), Publicis Media (Starcom, Zenith, Spark Foundry), Omnicom Media Group (OMD, PHD, Hearts & Science), and Dentsu's media brands (Carat, iProspect, Dentsu X). These groups combine strategic brand planning with programmatic, paid search, TV, OOH, and digital media buying under one umbrella. Key differentiators to assess include proprietary data platforms, trading desk capabilities, transparency in media spend, and their ability to consolidate reporting across markets.
Captured during this Readable report run. Answers can vary by AI tool and date.