Microsoft Invest

A major programmatic DSP that traced its lineage from AppNexus through Xandr to Microsoft, serving large agencies and brand advertisers before being sunset in favor of Microsoft Advertising's native platform.

Microsoft Invest was a demand-side platform (DSP) — formerly known as Xandr Invest and, before that, AppNexus — that has since been folded into the broader Microsoft Advertising platform.¹ It offered sophisticated campaign management capabilities, including support for first-party identifiers that enabled cross-domain and cross-device frequency capping without relying on third-party cookies.² It also integrated with data management platforms such as Mediarithnics, 1plusX, and Weborama, allowing advertisers to onboard and activate audience segments.² The shutdown applied only to the demand-side business, as the supply-side platform and publisher ad tech, Microsoft Monetize, was retained and continues to operate.¹ Microsoft determined that its commitment to more private and personalized advertising experiences was not achievable within the industry's existing DSP model, and as a result ceased supporting media buying through Microsoft Invest starting February 28, 2026.³ Source 1: adexchanger.com — Microsoft Is Shutting Down Invest, The One-Time ... Source 2: first-id.fr — Microsoft Advertising Invest (Formerly Xandr Invest) Source 3: microsoft.com — Empowering businesses for a future that is conversational, ...