AppNexus provides cloud-based advertising products and services.

AppNexus operates a cloud-based software platform that enables and optimizes programmatic online advertising. Its enterprise technology platform maximizes yield and campaign performance for sellers and buyers of online inventory, provides trading solutions and marketplaces for Internet advertising, and allows advertisers to build a trading desk, an advertising network, and a custom exchange.

AppNexus also provides a digital advertising delivery platform that enables publisher clients to maximize revenue across various demand sources, AppNexus Publisher Suite that powers advertisement serving, planning and forecasting, diverse marketplace sales, and direct campaign management solutions, PriceCheck, a header bidding solution for banner, video, and interstitial advertising units, and AppNexus Apps program, an application platform for third-party technology vendors and existing customers to build features for their own clients and reach new audiences.

AppNexus has a strategic partnership with Zeta Interactive Corp. Brian O'Kelley and Mike Nolet founded it in September 2007, with its headquarters in New York City and additional offices in several cities in the United States and other countries.

Founders:  Brian O'Kelley, Mike Nolet