Teads Sues Google. Ad Practices Were Never Retired
Teads has filed an antitrust lawsuit against Google, arguing that the tech giant’s disputed digital advertising practices continued to disadvantage competitors
Teads has filed an antitrust lawsuit against Google, arguing that the tech giant’s disputed digital advertising practices continued to disadvantage competitors even after some of those practices were formally changed or retired.
The case adds another major challenge to Google’s position in digital advertising. Teads is reportedly the fifth major supply-side platform–companies that help publishers sell advertising inventory–to sue Google over alleged anti-competitive conduct during the past year. The litigation arrives as regulators, publishers and rival ad-tech companies continue to scrutinize Google’s control over multiple parts of the digital advertising supply chain.
Teads points to billions of lost opportunities
Teads filed its 85-page complaint in the U.S. District Court for the Southern District of New York on August 3, 2026. The company is seeking financial damages and other legal remedies, alleging that Google used its position across the advertising ecosystem to restrict competition and reduce the ability of rival platforms to compete for publisher inventory.
At the center of the complaint is the relationship between Google Ads, the company’s advertiser platform, and AdX, Google’s ad exchange. Teads alleges that Google tied access to valuable advertiser demand to its own exchange, making it more difficult for competing exchanges to win auctions.
According to Teads, the arrangement cost rival exchanges approximately 6.88 trillion advertising impressions between 2017 and 2023. The complaint does not disclose the methodology behind that estimate, meaning the figure will likely become an important point of dispute as the case proceeds.
An impression represents a single instance in which an advertisement is shown, or made available to be shown, to a user. At the scale alleged by Teads, even small differences in auction access or win rates could translate into significant consequences for publishers, advertisers and competing technology providers.
The dispute follows a major court ruling
Teads’ lawsuit follows a 2025 ruling by a federal court in Virginia that found Google liable for unlawfully monopolizing the publisher ad-server and ad-exchange markets for open-web display advertising. The court also found that Google had unlawfully tied its publisher ad server, formerly known as DoubleClick for Publishers, to AdX.
The court’s findings focused on Google’s control of several interconnected tools used to buy and sell online advertising. The government argued that Google leveraged its position across the ad-tech stack to disadvantage rivals, influence auction outcomes and preserve its market power.
That ruling gave companies such as Teads a foundation for pursuing private damages claims. Teads says Google’s conduct caused direct financial harm to its business and limited the growth potential of independent ad-tech platforms and publishers.
“Retired” practices remain a central issue
The significance of Teads’ case is not limited to what Google allegedly did in the past. The company is also challenging the idea that certain practices stopped having an effect simply because Google changed their names, modified their mechanics or formally discontinued them.
This distinction matters in a rapidly evolving technology market. Auction rules, bidding priorities and publisher tools can be altered without changing the underlying structure of the marketplace. A practice may disappear in one form while its competitive advantages remain embedded in product design, data access, integration requirements or accumulated scale.
The government’s case described a series of practices that evolved over time, including “First Look,” “Last Look,” dynamic revenue sharing and unified pricing rules. The government argued that these mechanisms helped Google maintain an advantage over rival exchanges and limited publishers’ ability to work with competitors.
Teads’ lawsuit appears designed to examine whether the effects of those practices continued after Google announced changes to its products or policies.
More information: U.S. Department of Justice
