Xandr

Leading enterprise-grade programmatic advertising platform with strong presence in premium inventory and CTV advertising

Xandr is an advanced advertising technology platform that was originally formed by AT&T in 2018 through the combination of AppNexus (acquired for approximately $1.6 billion) and AT&T's advertising and analytics assets. The platform provides programmatic advertising solutions that enable advertisers, agencies, and publishers to buy and sell digital advertising inventory in real-time across multiple channels including display, video, mobile, and connected TV (CTV). In 2021, Microsoft acquired Xandr from AT&T to bolster its advertising capabilities, integrating it into Microsoft's broader advertising ecosystem. Xandr operates as a comprehensive ad tech platform offering both demand-side (DSP) and supply-side (SSP) capabilities, along with a robust marketplace for programmatic transactions. The platform is known for its sophisticated data management capabilities, advanced targeting options, and transparent marketplace dynamics. Xandr serves premium publishers and major advertisers globally, positioning itself as an enterprise-grade solution that emphasizes quality inventory, brand safety, and data-driven decision making. Its technology stack supports omnichannel campaigns and provides tools for audience segmentation, yield optimization, and campaign management.