Agentic ad buyers join 86% fewer auctions, DataBeat finds

August 17, 2026 · ppc.land

An 86% drop in auction participation and a 13.4% gap in clearing prices showed up together in DataBeat's May 2026 data, comparing buyers using AI agents against conventional programmatic demand. Conventional buyers paid $6.95 per thousand impressions on average; agentic buyers paid $6.13. Agentic buying still led on fill rate, 0.204% versus 0.183%, an 11.5% edge. IAB Tech Lab's AAMP 2.0, published in April 2026, built a path toward that pattern: agentic Programmatic Guaranteed deals, negotiated directly between buyer and publisher with price and volume fixed in advance, bypass the open auction entirely. Jeff Green, chief executive of The Trade Desk, described the split on the company's August 6, 2026 earnings call: competitors have concentrated on guaranteed, fixed-price and simple deal products, "Some are even wrapping these in agentic technologies," while The Trade Desk's own approach optimizes for outcomes through data, measurement and real-time adjustment. Rival platforms are pricing the guaranteed-plus-agentic combination at fees near 1%, against roughly 20% captured by the incumbent platform.

Campaigns routed through pre-negotiated agentic deals settle at fixed terms agreed in advance, closer to how television inventory has cleared for decades. Campaigns staying inside open auctions keep the per-impression pricing and competitive discovery programmatic was built on. The Trade Desk reported second-quarter revenue of $715 million, up 3%, and guided third-quarter revenue to at least $650 million, roughly 12% below the same quarter a year earlier, a sign of how much budget the guaranteed-deal shift is already pulling. Teams evaluating agentic buying tools should ask which model each vendor is actually building: an auction with an AI layer on top, or a guaranteed deal with an AI agent negotiating it.