Advertising.com

One of the largest and earliest performance-based digital ad networks in the United States, later operating as a key AOL advertising property

Advertising.com was one of the earliest and most influential digital advertising networks, founded in 1998 and headquartered in Baltimore, Maryland. The company built its reputation as a performance-driven ad network, connecting publishers with advertisers through a technology platform that optimized ad delivery across a vast network of websites. It was among the first companies to apply data-driven targeting and optimization techniques to online display advertising at scale, making it a foundational player in the emerging AdTech ecosystem. The company was acquired by AOL Time Warner in 2004 for approximately $435 million, a deal that reflected the significant value placed on its publisher network, targeting technology, and performance marketing capabilities. Under AOL's ownership, Advertising.com continued to operate as a distinct brand and expanded its offerings to include video advertising, mobile advertising, and audience targeting solutions. It served as a core component of AOL's digital advertising strategy for several years. Over time, AOL consolidated its various advertising properties and technologies under unified platforms, most notably the AOL One platform and later through Verizon's acquisition of AOL in 2015. The Advertising.com brand was gradually phased out as its technology and operations were absorbed into AOL's broader advertising stack, which itself was eventually folded into Verizon Media and then Yahoo. Advertising.com left a lasting legacy as a pioneer of performance-based digital advertising and an early proof point that data-driven ad optimization could deliver measurable results for both advertisers and publishers.

• 1998Founded
• —Defunct