How Antitrust Cases Against Tech Companies Actually Work

Antitrust lawsuits against technology companies often appear as sudden bombshells—a government agency or competitor files a complaint, headlines follow, and years pass before anyone understands the actual legal argument. But the process follows a well-established playbook. Understanding how these cases work, what evidence matters, and what courts can actually do illuminates why tech giants face increasing legal pressure and what outcomes are realistic.

What Antitrust Law Actually Prohibits

Antitrust law in the United States rests on two main federal statutes: the Sherman Act (1890) and the FTC Act (1914). Section 2 of the Sherman Act prohibits monopolization—specifically, the act of maintaining or acquiring monopoly power through anticompetitive means. This is distinct from simply being a monopoly, which is legal; the law targets abuse.

The FTC Act Section 5 is broader, covering “unfair methods of competition.” In practice, the FTC (Federal Trade Commission) and DOJ (Department of Justice Antitrust Division) enforce these laws by challenging conduct they believe harms competition and ultimately consumers.

For tech companies, courts must first define what market a company controls. Does Google dominate “search” broadly, or only “online search” specifically? Is the relevant market “smartphone operating systems” or “mobile devices” more generally? This seems like semantics but determines whether a company even qualifies as a monopolist.

The Two Paths: Government and Private Cases

Read also: How Recommendation Algorithms Decide What You See Online · How Self-Driving Cars Perceive the Road: Sensors, Processing, Limits · How Data Breaches Happen: From Phishing to Credential Stuffing

Antitrust cases originate two ways. Government enforcement comes from the FTC or DOJ. The FTC can file administrative complaints—tried before an internal judge—or sue directly in federal court. The DOJ sues only in federal court. These agencies investigate, subpoena documents, and decide whether enough evidence exists to proceed.

Private parties—competitors, businesses, sometimes consumers—can sue under the same statutes. Apple faced a suit from Epic Games (maker of Fortnite) in 2023, challenging the App Store’s 30 percent commission and restrictions on alternative payment methods. Epic was a private plaintiff using antitrust law as a business dispute tool.

Government cases carry more weight because they represent the state’s enforcement power and can result in structural remedies like forced divestitures. Private cases are faster (no multi-year investigation phase) but face higher evidentiary burdens to prove harm.

Market Definition and Monopoly Power

Defining the Playing Field

Before a court even discusses conduct, it must establish that the defendant holds monopoly power. This requires two steps: defining the relevant market and showing the defendant controls a dominant share.

Market definition is contentious. In the Google cases, the government argued that Google controls over 90 percent of the online search market. Google countered that the market also includes voice search, app stores, and shopping sites—categories where Google has lesser dominance. The broader the market definition, the weaker the monopoly claim.

Measuring Dominance

Once a market is defined, courts typically look for evidence of pricing power, barriers to entry, and switching costs. Can the company raise prices without losing customers? Can competitors realistically enter and compete? These economic questions shape the entire case.

Discovery and Evidence-Gathering

After a complaint is filed, both sides enter discovery—a process where they exchange documents, emails, deposition testimony, and other evidence. In tech cases, this phase often exposes internal communications that courts and the public find damning.

Discovery in the Google antitrust cases revealed emails discussing the company’s strategy to maintain search dominance and its exclusive agreements with phone makers. Epic’s case against Apple turned partly on internal Apple memos showing decision-making around App Store policies. These communications become central to proving intent and anticompetitive effect.

For defendants, discovery is burdensome. Companies must produce hundreds of thousands of pages of documents. For plaintiffs, it’s opportunity—the chance to find smoking guns.

Trial, Experts, and Economic Evidence

At trial, both sides present economic experts who testify about market definition, competitive effects, and consumer harm. These experts often disagree sharply on the same data—a standard feature of antitrust litigation.

The burden of proof differs by case type. Government plaintiffs must prove their case by “preponderance of the evidence” in most antitrust suits. Private plaintiffs face identical burdens. Judges (not juries in most antitrust cases) decide questions of fact and law.

Trials can last weeks or months. The Google trial in 2023 involved dozens of witnesses and experts and generated thousands of pages of trial transcripts. Judges must sift through technical economic theory, business strategy, and market data to reach a verdict.

Possible Remedies: What Courts Actually Order

Types of Relief

If a company loses, courts can impose several remedies. Injunctive relief orders the company to stop specific conduct—for example, stop requiring exclusive deals with phone makers. Divestitures force the company to sell divisions; this is the most drastic remedy and is rare.

Behavioral Restrictions

Behavioral remedies are common: operating restrictions, required licensing of technology, pricing controls, or greater transparency. Meta faced orders to maintain Instagram and WhatsApp as separate services. Google faced restrictions on its search-advertising practices.

Damages in private cases go to the plaintiff. In government cases, courts can’t award monetary damages, but they can impose civil penalties and disgorgement of profits.

The remedies courts actually impose often disappoint both sides—they’re narrower than plaintiffs hope but broader than defendants accept, leading to appeals.

Appeals and the Long Shadow of Uncertainty

Losing parties appeal to the circuit court and potentially the Supreme Court. Appeals can take years. This uncertainty keeps companies in legal limbo and complicates business planning.

The Supreme Court has intervened rarely in modern antitrust cases, but when it does, it can shift the entire field. Most appeals courts affirm trial court verdicts, but not always. A single appellate panel can reverse years of litigation.

Tech companies also face antitrust pressure from the European Commission, the UK, and other regulators. The EU often takes more aggressive stances than US courts, imposing larger fines and stricter behavioral remedies. The Digital Markets Act in Europe imposes ex-ante obligations on “gatekeeper” platforms—restrictions applied before any lawsuit is filed. For Brazilian users and businesses, international cases matter because they eventually shape how platforms operate globally. Restrictions Google faces in the EU often spread to Brazil, even without local enforcement.

Practical Impact on Tech Companies and Users

Living under antitrust risk changes how tech companies operate. They become more cautious about partnerships, acquisitions, and product integration. Policy and legal teams grow. Acquisitions that might proceed without antitrust scrutiny get blocked or require divestitures.

Users see mixed effects: some restrictions unlock competition (app store alternatives on iPhone), while others slow innovation if companies avoid investments they fear regulators will unwind.