Last Updated on March 26, 2026 by Elizabeth Nolan
The biggest business war in residential real estate just had its most dramatic week yet — and most agents are only catching pieces of it.
Here’s the full picture: what happened, who’s winning, and what it actually means for how you do your job.
The Week That Changed Everything
In seven days, this happened:
On March 17, 2026, Zillow launched Zillow Preview — a product that lets partner brokerages publicly post pre-market listings on Zillow and Trulia before they hit the MLS. Keller Williams, REMAX, HomeServices of America, Side, and United Real Estate signed on at launch.
On March 18, Compass dropped its antitrust lawsuit against Zillow — the one it filed in June 2025 claiming Zillow had monopoly power and was using it to crush competition.
On March 25 — today — 24 more brokerages joined Zillow Preview, bringing the total to 29. The same day, eXp Realty announced its own pre-market deals with Homes.com, Realtor.com, and ComeHome.com.
None of this happened in a vacuum. To understand what it means, you need to know how we got here.
How We Got Here: The Quick Version
NAR Holds the Line — Sort Of
In March 2025, after months of heated industry debate, NAR announced it would keep the Clear Cooperation Policy (CCP) in place. CCP, introduced in 2020, requires that any listing marketed publicly must be submitted to the MLS within one business day.
But NAR added a companion policy — Multiple Listing Options for Sellers (MLOS) — that created a new “delayed marketing exempt listings” category. Local MLSs could now allow sellers to keep listings off IDX syndication (the feeds that power Zillow and Realtor.com) for a period they determined themselves.
The headline was “CCP survives.” The real story was that the door to pre-market flexibility had been opened a crack — and everyone with money on the line moved immediately.
Zillow Draws a Line
Zillow had been watching the CCP debate nervously. Its entire business depends on having the most complete listing inventory. Private listings — homes marketed inside brokerage networks before hitting the MLS — are an existential threat to a portal that makes money by being the place buyers search.
In April 2025, Zillow introduced its Listing Access Standards (LAS): if a listing was publicly marketed without being on the MLS and broadly available to all consumers, it would be banned from Zillow. Permanently. Not delayed — gone.
This was aimed squarely at Compass.
Compass: The Company at the Center of Everything
Compass is the largest residential brokerage in the United States. In January 2026, it got significantly larger by finalizing its acquisition of Anywhere Real Estate — absorbing Century 21, Coldwell Banker, Sotheby’s International Realty, ERA, and Corcoran into one massive operation.
Compass has built its competitive strategy around private listings. Its “Three-Phased Marketing” approach starts homes as exclusives inside the Compass agent network, moves them to “Coming Soon” on Compass.com, then releases them broadly to the MLS. CEO Robert Reffkin has been explicit about the goal: make Compass.com the destination where buyers search — not Zillow.
Zillow’s LAS was a direct attack on that strategy.
The Lawsuit, the Loss, and the Plot Twist
Compass Sues Zillow
In June 2025, Compass sued Zillow for antitrust violations, arguing that the Listing Access Standards were designed to protect Zillow’s monopoly power and crush competition. Compass called it the “Zillow Ban.”
The lawsuit also alleged a conspiracy — that Zillow and Redfin had coordinated their policies. Redfin had announced a similar ban on certain private listings around the same time.
The Judge Says No
In February 2026, a New York federal judge denied Compass’s request for a preliminary injunction — meaning Zillow could keep enforcing its rules while the lawsuit continued. The judge found that Compass had not shown it was likely to win its antitrust claims.
The Plot Twist
Three weeks after the judge’s ruling, Compass announced a partnership with Redfin — the company it had named a co-conspirator in the Zillow lawsuit. Under the deal, Compass’s “Coming Soon” listings would appear exclusively on Redfin.com.
Redfin is now owned by Rocket Companies, which also owns Rocket Mortgage. The alliance gave Compass a major portal to syndicate pre-market listings to — without Zillow.
Zillow Pivots: From Ban to Preview
One day after Compass announced the Redfin deal, Zillow changed its strategy entirely.
Instead of simply banning private listings, Zillow launched Zillow Preview — a product that brings pre-market listings into the open by making them publicly visible on Zillow and Trulia before they go active in the MLS. The key distinction from Compass’s approach: any consumer can see them, without signing up with any particular brokerage.
Zillow’s argument: pre-market listings aren’t the problem. Hidden pre-market listings are. If a home is going to be marketed before it hits the MLS, it should be visible to everyone — not just the clients of one company.
The same day Zillow announced Preview, Compass dropped its lawsuit.
The Camps Are Forming
The industry is now splitting into two clear coalitions — and the brokerages are choosing sides.
Team Zillow Preview: Keller Williams, REMAX, HomeServices of America (which includes Berkshire Hathaway HomeServices), Side, United Real Estate, Engel & Völkers, LeadingRE, SERHANT, and 21 others as of this week. These firms are betting that broad public exposure — even pre-market — is both better for sellers and safer legally.
Team Anti-Zillow: Compass (now including the Anywhere brands) partnered with Redfin/Rocket. eXp Realty partnered with Homes.com, Realtor.com, and ComeHome.com. These firms are building pre-market pipelines that route around Zillow entirely.
The underlying philosophy is the same on both sides — sellers deserve pre-market options. The difference is whether that pre-market period is visible to all consumers publicly, or distributed through selected partner networks.
What’s Still Coming
The Compass-NWMLS lawsuit has a trial date in June 2026. Northwest MLS is a non-NAR-affiliated MLS that doesn’t have to follow NAR’s policies — and doesn’t allow office exclusives at all. Compass argues that makes NWMLS an illegal monopolist. If Compass wins that case, the MLS model faces a legal challenge that goes well beyond private listings.
Reffkin has also promised to build a network of brokerage-owned consumer sites around a “your listing, your lead” model — where buyer inquiries on a listing route directly to the listing agent, not to Zillow’s Premier Agent network. That’s a direct attack on Zillow’s core revenue model.
And regulators are watching. The DOJ is monitoring the Compass-Anywhere merger, though it cleared the Hart-Scott-Rodino waiting period in early January 2026. The FTC has also drawn attention to the consolidation.
What This Means for Agents Right Now
If you’re at a brokerage that joined Zillow Preview
Your pre-market listings can now go on Zillow before they hit the MLS — publicly, with priority placement in search results and saved-home alerts. Buyers can find them, save them, and request tours. You keep the listing lead. If a Zillow Preferred Agent closes a buyer from your Preview listing, Zillow pays you 10% of their buyer commission as a referral fee.
The tradeoff: you’re operating inside Zillow’s ecosystem, and Zillow is still routing buyer inquiries through its own agent network on the buy side.
If you’re at Compass or an Anywhere brand
Your pre-market strategy runs through Redfin.com and Compass.com. Your Coming Soon listings have a major portal now — just not Zillow. Given Zillow’s 235 million monthly unique visitors versus Redfin’s smaller but growing audience, the exposure question is real.
If you’re at everyone else
This is where most agents actually are. You’re watching the platform war play out and trying to advise clients on where their listing should live before it goes active. The practical answer right now: Coming Soon on the MLS is still the cleanest option. It’s visible to everyone, it complies with MLS rules, and it doesn’t require you to pick a side in a fight that isn’t yours.
For your buyer clients
The fragmentation is real and it affects them. A buyer who searches only on Zillow will see Zillow Preview listings but not Compass exclusives or Redfin Coming Soons. A buyer who searches only on Redfin will see Compass listings but miss Zillow Previews. The best thing you can offer a buyer right now is the knowledge that no single portal has the full picture — and that your job is to find what the portals miss.
The Bigger Question
What’s actually at stake here isn’t which portal wins. It’s whether the MLS — the shared, cooperative database that has been the foundation of American real estate for a century — remains the center of the market or becomes one option among many.
If Compass’s vision wins, premium inventory flows through private brokerage networks first, with the MLS as a last resort. The agent with the biggest internal network wins, and the public marketplace shrinks.
If Zillow’s vision wins, pre-market listings are public and broadly visible, the MLS stays central, and portals remain the dominant consumer search destination — with Zillow at the top.
The June 2026 NWMLS trial will be worth watching. So will the DOJ.
This post reflects developments through March 25, 2026. This space is moving fast — check back for updates as the legal battles develop.
