By Tom Whitfield

Prebid has unveiled a plan to take Google's place in the programmatic auction, presenting it this week at its annual Prebid Summit. The move follows a court decision that stopped short of ordering Google to break up its supply-side platform and ad server.

The ruling left Google intact but under requirements it must still satisfy. Prebid, the open-source header bidding community, positioned its proposal as a way to help Google fulfill those court requirements — while effectively swapping seats with the search giant in the auction.

What did the court decide?

The court declined to force a separation of Google's SSP and its ad server. That outcome removed the most drastic remedy on the table. It did not remove the obligations the judgment imposed on how Google runs its advertising business.

Prebid's answer, laid out at the Prebid Summit this week, is to insert its own technology where Google's currently sits. The company framed the plan under the banner "The Auction Flip" — a direct bid to trade places with Google rather than dismantle it.

How would the swap work?

Details from the summit outline a straightforward logic:

• Google keeps its obligations under the court's requirements.
• Prebid supplies the infrastructure that satisfies them.
• The auction position Google has held moves to Prebid.

The proposal amounts to a competitive claim, not a legal one. Prebid argues the market can rebalance itself through its open-source stack, without a forced divestiture.

What else came out of the summit?

Two further themes ran alongside the auction announcement.

First, brands discussed how they are using their own data in an agentic world — one where AI agents increasingly act on behalf of consumers and marketers alike.

Second, speakers pointed to a rise of AI "employees": software agents taking on work traditionally done by people.

Neither topic carried the weight of the Google plan. Both signal where Prebid's community expects advertiser behavior to move next.

Why it matters

The plan's fate depends on whether courts, advertisers and publishers accept Prebid's infrastructure as a genuine substitute for Google's. If they do, the industry's auction order changes without a breakup. If they do not, the court's requirements land back on Google alone.