Advertisers and rivals press Google legally

Google is facing a new two-front legal push as advertisers prepare mass arbitration claims and rival app store Aptoide sues over Android distribution and billing. (searchengineland.com) (reuters.com) Search Engine Land reported on April 14 that advertisers are lining up individual arbitration demands tied to court findings that Google illegally monopolized parts of the ad-tech market, with industry estimates putting potential damages in the billions. The claims are being organized through mass arbitration, a process that files many individual cases at once instead of one class action. (searchengineland.com) (classaction.org) Those ad claims trace back to an April 17, 2025 ruling by United States District Judge Leonie Brinkema, who found Google liable for monopolizing publisher ad servers and ad exchanges and for unlawfully tying those products together. The United States Department of Justice said the case challenged Google’s control of tools publishers use to sell digital ad space. (justice.gov) (stblaw.com) Aptoide filed its lawsuit on April 14, 2026 in federal court in San Francisco, accusing Google of shutting out rival Android app stores by monopolizing app distribution and in-app billing. Reuters reported that Aptoide said Google’s conduct kept smaller stores from winning developers, content and users. (reuters.com) (usnews.com) The two cases hit different parts of Google’s business, but both focus on the same antitrust theory: Google used control over a core platform to steer transactions through its own systems. In ad tech, that means software publishers use to place and sell ads; in Android, that means the store and payment rails developers need to reach users. (justice.gov) (reuters.com) Google has been fighting those monopoly claims on multiple fronts. In the Android app-store case brought by Epic Games, a jury found in December 2023 that Google held illegal monopoly power in Android app distribution and billing, and the United States Court of Appeals for the Ninth Circuit later upheld that verdict and a three-year injunction. (ca9.uscourts.gov) (jurist.org) Aptoide says it is the world’s third-largest Android app store and told Reuters it had about 200 million annual users by 2024 and roughly 436,000 apps in its catalog. The company says it charges lower commissions than Google Play and wants damages and court orders blocking Google’s conduct. (reuters.com) (economictimes.indiatimes.com) Google did not immediately respond to Reuters’ request for comment on Aptoide’s suit. In the ad-tech case, Google has previously said publishers have many choices and that the court rejected part of the government’s case involving advertiser tools. (reuters.com) (justice.gov) The immediate question is whether private plaintiffs can turn those antitrust wins against Google into money claims and operating changes. For Google, the pressure is no longer coming only from regulators and Epic Games, but from advertisers and rival stores trying to use the courts one case at a time. (searchengineland.com) (reuters.com)