Breaking the Walled Gardens: How the EU's Digital Markets Act and US DOJ Lawsuits are Forcing Tech Open
The world’s most valuable digital platforms are being pushed into a structural reset. In Brussels, the EU’s Digital Markets Act is forcing designated “gatekeepers” to open app distribution, loosen default settings, and permit greater interoperability across mobile ecosystems. In Washington, the US Department of Justice and state attorneys general are pursuing antitrust cases that challenge the economics of search, app stores, advertising, and platform self-preferencing. Together, the two regimes are attacking the same business model from different angles: control of access, defaults, and data flows. The stakes are not just legal. They reach into the trillion-dollar logic of mobile software, cloud infrastructure, and digital advertising, where Apple, Google, Amazon, and Meta have built durable tollbooths around user attention and developer dependence. Compliance is already reshaping product design, legal budgets, and revenue forecasts. But the counteroffensive is equally significant: Big Tech argues that mandated openness could weaken security, fragment user experience, and reduce incentives to invest. The result is a transatlantic contest over whether digital markets should remain vertically integrated ecosystems or be treated as regulated infrastructure.