How the Exit Could Reach Renters and Property Managers
The Zillow-Redfin case raises two related but different questions about harm: what happens to property managers when an independent advertising seller leaves, and what happens to renters when the search services around their homes become less competitive? This chapter follows the agencies’ alleged pathways through those two groups, then separates the mechanism they describe from outcomes the supplied record actually measures. The distinction matters because a plausible theory of harm is not the same thing as a proven change in prices, listings, or service quality.
Two pathways from lost rivalry to claimed harm
The relevant market is an Internet Listing Service for multifamily properties, with property managers and other marketers on one side and renters on the other. Property managers use an ILS to advertise available units; renters use it to find those units. Zillow and Redfin were described as two of the largest rental ILS networks, so the alleged loss of Redfin’s independent advertising business could affect both the commercial side that buys visibility and the consumer side that relies on the resulting search experience.
The property-manager pathway begins with choice. A building manager can compare platforms, decide which company to contract with, and evaluate the service received after listings go live. If Redfin no longer independently acquired those advertising customers, the manager would have fewer sellers competing for the contract. The New York Attorney General said the agreements harmed building managers through higher prices, fewer choices, and lower-quality rental advertising. The FTC similarly described the alleged arrangement as ending Redfin’s role as an independent competitor for multifamily property advertising customers.
The claim is not that a manager automatically pays more whenever one platform exits. Price depends on many conditions that the supplied sources do not measure. The narrower point is that a major independent seller can provide an alternative offer even when a manager ultimately chooses the incumbent. It can challenge a price, propose a different way to distribute listings, improve lead handling, or invest in a service feature that the incumbent would not otherwise prioritize. Removing that seller may change the negotiation environment before any price appears on an invoice.
The renter pathway runs through the service that the advertiser funds. A renter may care about the number and freshness of listings, the clarity of the search experience, the quality of information, and the ease of contacting a property manager. The state release alleged that the Zillow-Redfin arrangement could leave renters with higher prices, fewer listings, and lower-quality services. The FTC said restoring competition was expected to reduce costs and spur innovation that would benefit renters and property-management companies.
Those pathways are connected, but they are not identical. A Redfin page showing a Zillow-supplied apartment might preserve some immediate access for a renter even if Redfin no longer competes for the property manager’s advertising contract. Conversely, a property manager might still reach renters through Zillow while losing the pressure created by a separate Redfin offer. The same arrangement can therefore preserve a visible consumer service in the short term while changing the competitive conditions that shape advertising prices, listing supply, and product improvement over time.
That difference is why the agencies’ alleged harms should not be reduced to the claim that “there were fewer websites.” The issue is whether the remaining platforms could be trusted to provide the same level of choice and improvement without a close independent rival. The FTC characterized the agreement as an end run around competition that insulated Zillow from competing head-to-head with Redfin on the merits and further concentrated an already condensed market. In that account, concentration is not just a count of web addresses. It is a change in who can make a meaningful offer to advertisers and who has an incentive to develop a competing service.
The phrase “already condensed” should also be read carefully. It is the FTC’s characterization of the market, not a market-share calculation contained in the supplied documents.