The Compass vs. Zillow lawsuit was a federal antitrust case filed in June 2025 by Compass Inc. against Zillow, challenging Zillow’s new policy that banned privately marketed home listings from its platform. Compass lost its bid for a preliminary injunction in February 2026 and voluntarily dismissed the case the following month, after Zillow rolled out a product that let brokerages display pre-market listings on Zillow again.
What the Fight Was About
Compass, then the largest U.S. brokerage by sales volume, had built a marketing strategy around a phased release. A seller could first list a home as a “Private Exclusive” visible only to Compass’s roughly 33,000 agents, then promote it as “Coming Soon” on Compass.com, and only later push it to the Multiple Listing Service and public portals like Zillow. CEO Robert Reffkin argued the approach let sellers test pricing and avoid a public days-on-market counter, and Compass cited data showing pre-marketed listings closed at prices 2.9% higher on average.1Compass. A Letter From Robert Reffkin By early 2025, nearly half of Compass’s transacting homeowners were choosing to start with a private phase.2Real Estate News. Compass CEO Trumpets Growth and Seller Choice
In April 2025, Zillow announced “Listing Access Standards.” Any home publicly marketed to buyers — on a brokerage website, through email blasts, on social media — had to be submitted to the MLS and syndicated to Zillow within one business day. Listings that weren’t would be banned from Zillow, Trulia, and, according to Compass, the sites of Redfin and eXp Realty, which adopted similar policies.3Zillow. Updating Zillow’s Listing Access Standards for Today’s Market Zillow framed the rule as consumer protection: “Hiding listings creates a fragmented market, limits consumer choice and creates barriers to homeownership.”4Fordham Journal of Corporate and Financial Law. Compass v. Zillow: Updates and Implications for Residential Real Estate Enforcement began in phases, with agent notifications starting May 28, 2025, and noncompliant listings banned starting June 30, 2025.5HousingWire. Zillow Ban Noncompliant Listings June 30
For Compass, the stakes were unusually high. Zillow averages roughly 220 million unique visitors per month and claims control of nearly two-thirds of the U.S. real estate audience share.6The New York Times. Zillow Compass Real Estate Consolidation Compass alleged that over 80% of home searchers use Zillow, so being locked out was a business threat, not a nuisance.4Fordham Journal of Corporate and Financial Law. Compass v. Zillow: Updates and Implications for Residential Real Estate
The Antitrust Claims
Compass filed suit on June 23, 2025, in the U.S. District Court for the Southern District of New York. The case was captioned Compass Inc v. Zillow Inc et al, No. 25-05201, and alleged violations of the Sherman Antitrust Act on two theories.7Reuters. Compass Sues Zillow Allegedly Stifling Competition Home Listings
The first was monopolization. Compass accused Zillow of using its dominance in online home search to force brokerages to abandon pre-market strategies or lose access to the platform most buyers use. The second was a “hub-and-spoke” conspiracy claim, alleging that Zillow coordinated with Redfin and eXp Realty to impose parallel bans, effectively creating a group boycott of any listing that wasn’t immediately on the MLS.8Harvard Law School. The Zillow Ban Makes Searching for Homes More Complicated but Is It Illegal Compass sought an injunction blocking the ban, compensatory damages, and triple damages for alleged willful misconduct.7Reuters. Compass Sues Zillow Allegedly Stifling Competition Home Listings Zillow was represented by Wilson Sonsini Goodrich & Rosati; Compass retained Crowell & Moring.9New York Law Journal. SDNY Judge Compels Zillow Co-Founder Deposition in Home Listings Antitrust Case
The “Punish” Document and the Frink Deposition
Discovery moved on an expedited schedule. In September 2025, Judge Jeannette A. Vargas ordered the deposition of Zillow co-founder Lloyd Frink, finding he had “unique and personal knowledge” relevant to the preliminary injunction motion.9New York Law Journal. SDNY Judge Compels Zillow Co-Founder Deposition in Home Listings Antitrust Case
The most publicized moment came during a four-day evidentiary hearing in November 2025. Compass introduced an internal Zillow strategy document that stated the company’s intent to “punish” agents who listed properties on alternative platforms. Compass argued the document showed the ban was not a neutral consumer-protection measure but a deliberate tool to preserve Zillow’s dominance.4Fordham Journal of Corporate and Financial Law. Compass v. Zillow: Updates and Implications for Residential Real Estate
The Preliminary Injunction Was Denied
On February 6, 2026, Judge Vargas issued a 50-page order denying Compass’s motion for a preliminary injunction.10Inner City Press. SDNY Vargas Zillow Compass The ruling went against Compass on every major point.
On monopolization, the judge expressed skepticism that Zillow held enough market power to exclude competition, noting brokerages had alternative ways to market listings even if those alternatives were less popular. On the conspiracy theory, the court found no direct evidence of an illegal agreement between Zillow and Redfin. It called allegations of a “quid pro quo” between them “merely speculative” and suggested that Redfin and eXp Realty adopting similar policies could be “independent reactions” to the National Association of Realtors relaxing its Clear Cooperation policy in March 2025.11Real Estate News. Zillow Can Continue Enforcing Private Listing Ban Judge Rules The court acknowledged the internal “punish” document but found it did not overcome the lack of evidence that brokerages had actually stopped using pre-market strategies because of the policy.4Fordham Journal of Corporate and Financial Law. Compass v. Zillow: Updates and Implications for Residential Real Estate
Zillow’s Listing Access Standards stayed in full effect while the case continued.
What Changed Before the Case Ended
The market moved faster than the litigation. On February 26, 2026, Compass and Redfin announced a three-year partnership. Compass “Coming Soon” listings would be syndicated directly to Redfin with priority search placement, no days-on-market or price-drop history displayed, and the listing agent’s contact information featured prominently. Leads went to the listing agent with a 24-hour exclusive window. The deal potentially brought more than 500,000 off-MLS listings to Redfin’s 60 million monthly visitors.12HousingWire. Compass Coming Soon Redfin
Less than three weeks later, on March 17, 2026, Zillow launched “Zillow Preview,” letting brokerages display pre-market listings on Zillow and Trulia before those homes went live in the MLS. Keller Williams, RE/MAX, HomeServices of America, Side, and United Real Estate signed on as launch partners.13Zillow. Zillow Launches Zillow Preview to Bring Pre-Market Home Listings Into the Open Preview listings receive elevated placement, buyer inquiries to the listing agent are free, and listing agents can earn a share of Zillow’s revenue if a Preview connection leads to a closed transaction through Zillow’s preferred-agent network.14Real Estate News. Zillow Launches Preview to Highlight Pre-Market Listings
Compass Dropped the Case
On March 18, 2026, the day after Zillow Preview launched, Compass voluntarily dismissed the lawsuit without prejudice, preserving the right to refile.15Real Estate News. Compass Drops Lawsuit After Zillow Embraces Pre-Marketing Reffkin claimed victory, calling Preview a reversal of the ban and saying, “The end of the ‘Zillow Ban’ is a major victory for homesellers and their real estate professionals.”16CNN. Compass Zillow Lawsuit Listing Ban
Zillow characterized the dismissal as a “voluntary withdrawal” of a “meritless attack” and said its Listing Access Standards remained fully in effect.15Real Estate News. Compass Drops Lawsuit After Zillow Embraces Pre-Marketing Both sides had a point. Zillow stopped banning listings advertised on public-facing websites and portals, but continued to ban listings marketed exclusively within private brokerage networks. Compass listings that never leave the company’s internal “Private Exclusive” channel can still be excluded from Zillow.17HousingWire. Pre-Market Listings Zillow Policy Change
What’s Still Open
The dismissal ended the Compass case in New York but not the broader dispute between the two companies. In April 2026, Compass and Midwest Real Estate Data (MRED), the MLS serving the Chicagoland area, announced a partnership to take MRED’s Private Listing Network national. In May 2026, MRED demanded Zillow reinstate certain Compass private listings located outside MRED’s service area, in states such as California, Georgia, and Florida. When Zillow refused, MRED suspended Zillow’s Chicagoland feed on May 20, 2026, alleging a material breach of their licensing agreement.18HousingWire. Zillow Injunction MRED IDX VOW
Zillow filed a new antitrust suit against MRED and Compass on May 12, 2026, alleging a coordinated conspiracy to withhold listing data. Zillow pointed to internal communications, including an email from an MRED board member who was also a Compass executive, allegedly warning a Compass agent in advance that MRED would cut Zillow’s access.19Zillow. MRED Fact Check About What’s Really Happening in Chicago On May 22, 2026, Judge John Tharp partially granted Zillow a temporary restraining order, requiring MRED to restore Chicagoland listings and prohibiting Zillow from banning listings in ZIP codes where MRED had listings between April 2025 and April 2026. Zillow could keep enforcing its standards outside MRED’s territory. A further hearing was scheduled for July 2026.18HousingWire. Zillow Injunction MRED IDX VOW
Two separate antitrust matters run alongside the Compass fight but don’t decide it. The Federal Trade Commission and five state attorneys general sued Zillow and Redfin in fall 2025 over a $100 million rental-advertising deal, and Judge Anthony Trenga denied a motion to dismiss on May 6, 2026, letting that case proceed toward trial.20Multifamily Dive. Zillow Redfin Antitrust Lawsuit Judge Reject Dismiss The New York attorney general also opened an antitrust investigation into Compass’s January 2026 acquisition of Anywhere Real Estate, the $1.6 billion all-stock deal that made Compass the world’s largest residential brokerage with over 200,000 agents.21The Wall Street Journal. Real Estate Giant Compass Under Antitrust Investigation in New York Neither case reopens the dismissed New York lawsuit, but together they show how quickly antitrust pressure has built around the companies that now sit at the center of American home search.