24/7 Media

One of the largest early digital advertising networks and ad serving platforms, later absorbed into WPP's programmatic infrastructure

24/7 Media was one of the earliest and most influential digital advertising networks, founded in the late 1990s during the first wave of online advertising. The company provided ad serving technology, targeting capabilities, and a broad publisher network that connected advertisers with online audiences at scale. It later rebranded as 24/7 Real Media, expanding its offerings to include search marketing, rich media, and data-driven targeting solutions that were considered advanced for their era. At its peak, 24/7 Real Media operated a global network spanning multiple continents and was recognized as a significant competitor to DoubleClick and other early ad tech giants. In 2007, WPP acquired 24/7 Real Media for approximately $649 million, one of the largest AdTech acquisitions of that period, signaling the holding company's ambition to build a proprietary technology stack for digital advertising. Under WPP, the platform continued to serve publishers and advertisers as part of the broader GroupM ecosystem, leveraging its sell-side technology and publisher relationships to complement WPP's media buying operations. In December 2013, WPP merged 24/7 Media into Xaxis, GroupM's programmatic trading unit, effectively retiring the 24/7 brand. The sell-side technology and publisher network assets were folded into Xaxis (which later evolved into WPP Media), marking the end of 24/7 as a distinct operating entity. The company's legacy endures in the foundational role it played in shaping early digital advertising infrastructure, including ad networks, ad serving, and audience targeting — capabilities that became the bedrock of the modern programmatic ecosystem.