Real Estate Portal Wars Escalate: Zillow Dumps Matterport 3D Tours Amid CoStar Tensions—But Scores Win in Supreme Court

The battle for real estate market dominance just took a major turn. Zillow has officially removed all Matterport 3D home tours from its platform, including StreetEasy listings, following a move by rival CoStar Group to terminate their API agreement. This is the latest flare-up in the escalating real estate technology conflict between the two giants.

The Great Matterport Migration

The change was necessitated after CoStar—which acquired Matterport for a reported $1.6 billion—declined to renew the Matterport API agreement with Zillow. The move immediately impacts agents who relied on the popular virtual tours for their listings, forcing Zillow to strip the tours from its sites.

In an email to its partners, StreetEasy confirmed the removal, stating it had “no choice” but to comply. The core of the issue stems from CoStar’s updated terms of service, which were revised on September 29, 2025. These new terms restrict the use of CoStar Group media, including Matterport tours, on rival platforms like Zillow and StreetEasy. Essentially, CoStar is attempting to limit its content to its own portfolio, including Homes.com.

Zillow's response has been sharp, labeling the decision as "harmful to everyone in the industry" and accusing CoStar of trying to “wall off data” that should remain open for real estate professionals.

What This Means for Agents:

While the loss of Matterport is frustrating, Zillow and StreetEasy are highlighting several other 3D home tour options that remain available and integrated with their platforms, including:

• Zillow 3D Home

• Peek

• Skyward 360

• EyeSpy360

• The 3D App

• Giraffe360

The company has promised forthcoming updates to help agents transition and upload new virtual tour content.

A Separate Victory: REX Antitrust Case Ends

In a decidedly positive turn for Zillow this week, the company secured a major legal win. The U.S. Supreme Court declined to review the REX antitrust case against Zillow and the National Association of REALTORS®.

This decision effectively ends a four-year legal dispute brought by the now-defunct brokerage REX Real Estate. Lower courts had consistently ruled in Zillow's favor, finding that Zillow and NAR did not conspire to conceal non-MLS listings.

The Supreme Court's refusal to hear the appeal means the Ninth Circuit’s ruling stands, closing a lengthy chapter that challenged transparency and competitive practices in the real estate portal space.

"We’re pleased this matter has reached the conclusion we expected and that the court at every level has affirmed Zillow’s position," a Zillow spokesperson said, reinforcing the company's commitment to "transparency, innovation and prioritizing consumers.”

This week proves that the real estate technology landscape is constantly in motion, delivering a potent mix of intense market rivalry and legal vindication for the industry's biggest players. Stay tuned as this ongoing story unfolds.