Key takeaways

A federal judge denied Zillow and Redfin's motion to dismiss the FTC's antitrust lawsuit.

The Federal Trade Commission alleges Zillow paid Redfin 100 million dollars to reduce competition in the rental listings market.

The defendants unsuccessfully challenged the agency's definition of the relevant market in an attempt to secure an early dismissal.

The antitrust litigation will now proceed to discovery and further substantive proceedings in federal court.

The Decision

A federal judge has denied a motion to dismiss an antitrust lawsuit brought by the Federal Trade Commission against real estate platforms Zillow and Redfin. The ruling in Ftc v. Zillow ensures that the federal government's enforcement action will proceed past the initial pleading stage.

The Federal Trade Commission alleges that Zillow and Redfin engaged in coordinated activities that suppressed competition in the rental listings market. At the center of the agency's complaint is an accusation that Zillow paid Redfin 100 million dollars to reduce competition regarding rental listings. In response to the complaint, Zillow and Redfin sought to have the lawsuit dismissed entirely by challenging the FTC's definition of the relevant market. The federal court rejected this argument, determining that the agency's market definition was sufficient to survive an early dismissal effort. The legal proceedings against Zillow and Redfin are scheduled to move forward following the judge's ruling.

Why It Matters

Surviving a motion to dismiss represents a substantial procedural victory for federal antitrust enforcers. In antitrust litigation, defendants frequently attack the plaintiff's proposed "relevant market" at the earliest possible stage. If a court determines that the alleged market is implausible or improperly defined, the entire case can be dismissed before the parties exchange internal documents.

By rejecting the defendants' motion, the federal court signaled that the Federal Trade Commission pleaded a legally viable market for rental listings. This decision shifts the burden from the pleadings to the evidence. The agency will now have the opportunity to demand internal communications, financial records, and strategic documents from both Zillow and Redfin to substantiate the claim that the 100 million dollar payment was designed to suppress competition. For the broader technology and real estate sectors, the ruling demonstrates that federal courts remain willing to entertain targeted antitrust enforcement actions against established digital platforms when the government identifies specific, allegedly anticompetitive financial arrangements.

Who Should Care

For lawyers

Antitrust practitioners should note the court's treatment of the relevant market definition at the motion to dismiss phase. Pleading a relevant market requires balancing specificity with sufficient breadth to capture the alleged anticompetitive harm. Defense counsel frequently rely on market definition challenges to terminate antitrust litigation early, arguing that the plaintiff artificially narrowed the market to manufacture a monopoly or duopoly scenario. The ruling indicates that federal courts may grant federal agencies substantial leeway in defining digital markets at the pleading stage, provided the complaint links the market definition to specific exclusionary conduct, such as the alleged 100 million dollar payment.

For consumers

Renters and property managers rely heavily on digital platforms to find housing and advertise available units. If competition in the rental listings market is suppressed, property managers might face higher fees to list their properties, while renters might experience reduced access to comprehensive housing data. The continuation of this lawsuit means the federal government will keep investigating whether the financial arrangements between major real estate platforms ultimately harm the people who use those platforms to find homes.

Legal Background

Federal antitrust law prohibits agreements that unreasonably restrain trade and practices that monopolize or attempt to monopolize a market. To evaluate whether a specific business practice harms competition, courts must first understand the boundaries of the competition taking place. This requires defining the "relevant market," which consists of both a product market (the specific goods or services at issue) and a geographic market (the area where the competition occurs).

At the motion to dismiss stage, courts evaluate whether the plaintiff's complaint states a plausible claim for relief. The court must accept all factual allegations in the complaint as true and draw all reasonable inferences in the plaintiff's favor. In antitrust cases, defendants often argue that the plaintiff's proposed relevant market is legally defective on its face. If the market definition fails, the claims of market power and anticompetitive effects typically collapse alongside it. Historically, courts demand that a market definition encompass all products that consumers view as reasonable substitutes.

What the Court Did

The federal court evaluated the motion to dismiss by focusing on the Federal Trade Commission's allegations regarding the rental listings market. Zillow and Redfin argued that the agency's complaint relied on a flawed market definition, asserting that the lawsuit should be terminated before discovery.

The judge rejected the defendants' arguments. By denying the motion to dismiss, the court determined that the agency adequately pleaded a relevant market for rental listings. Furthermore, the court found that the specific factual allegations—namely, the accusation that Zillow paid Redfin 100 million dollars to reduce competition—were sufficient to state a plausible antitrust claim. The ruling did not determine whether Zillow and Redfin actually violated antitrust laws; rather, it established that the federal government presented a valid legal theory supported by sufficient factual claims to warrant a full evidentiary inquiry.

How It May Be Applied

The legal proceedings will now enter the discovery phase, which is often the most expensive and time-consuming portion of federal civil litigation. The Federal Trade Commission will seek to uncover evidence detailing the negotiations, intent, and execution of the 100 million dollar payment. The agency will attempt to prove that the payment directly resulted in suppressed competition within the rental listings market.

Zillow and Redfin will likely use the discovery process to build a factual record supporting their position that the relevant market is broader than the agency claims, or that the financial arrangement had legitimate, pro-competitive business justifications. Following discovery, the defendants will have another opportunity to resolve the case before trial by filing motions for summary judgment. At that stage, the court will no longer accept the agency's allegations as true, but will instead require the government to produce admissible evidence proving its market definition and the alleged anticompetitive effects.

Market Definition in Antitrust Litigation

Litigation Phase	Plaintiff's Burden	Defendant's Strategy	Court's Standard of Review
Motion to Dismiss	Plead a plausible relevant market and specific anticompetitive conduct.	Argue the market definition is legally defective or illogical on its face.	Accept all factual allegations as true; draw inferences in plaintiff's favor.
Summary Judgment	Produce admissible evidence proving the market boundaries and competitive harm.	Demonstrate the absence of a genuine dispute of material fact regarding the market.	Evaluate the evidentiary record to determine if a trial is necessary.
Trial	Prove the market definition and anticompetitive effects by a preponderance of the evidence.	Present competing expert testimony and evidence to refute the plaintiff's claims.	Weigh the credibility of evidence and expert witnesses to issue a final verdict.

The Bottom Line

The federal government has successfully cleared the first major procedural hurdle in its effort to hold Zillow and Redfin accountable for alleged antitrust violations. By surviving the motion to dismiss, the Federal Trade Commission gains the authority to demand internal records and sworn testimony regarding the 100 million dollar payment. While the court has not yet ruled on the ultimate merits of the case, the decision ensures that the companies' financial arrangements in the rental listings market will face intense judicial scrutiny as the litigation proceeds.

This article is general legal information and commentary about legal developments. It is not legal advice, does not address your specific situation, and is not a substitute for advice from a licensed attorney. Reading this article and contacting us through this website do not create an attorney-client relationship.

Sources & authorities

Ftc v. Zillow — source

Federal Court Advances FTC Antitrust Suit Against Zillow and Redfin

Key takeaways