Horizon Media

Largest independent media agency in the world and third largest U.S. media agency by billings, with an estimated $8.7 billion in billings

Horizon Media is the largest independent media agency in the world, headquartered in New York with additional offices in Los Angeles and Toronto.¹ With estimated billings of $8.7 billion and over 2,300 employees, the agency ranks as the third largest U.S. media agency by COMvergence data and has been recognized as one of the world's ten most innovative marketing and advertising companies by Fast Company.¹ This system, called HorizonOS, combines an interconnected architecture of technology and human intelligence, relying on Horizon's Blu AI platform to power audience strategies, campaign activations, and measurement, alongside Agent Q, an internal AI thought partner built on Google Gemini and connected to Horizon's proprietary data.² Horizon also offers Answer Engine Optimization as an integrated capability, producing content structured for AI answer engines to parse and corroborate, while connecting AI visibility metrics to branded demand, qualified visits, and revenue through closed-loop measurement.³ Source 1: aaaa.org — Horizon Media Source 2: marketingdive.com — Horizon introduces open ad tech partnership network Source 3: horizonmedia.com — Answer Engine Optimization (AEO) for B2B - Horizon Business