Ad Tech Briefing: Microsoft’s DSP closure signals ad tech consolidation, as well as the AI arms race

Earlier this week, it emerged that Microsoft is shutting down its demand-side platform, Xandr Invest. This move signals the broader strategic shift toward AI-driven advertising and an end to the old AppNexus as many once knew it. 

The company informed clients on May 14 that the DSP would cease operations by Feb. 28, 2026, citing misalignment with its evolving priorities.

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