In Two Fast-Track SWIFT Cases, National Advertising Division Recommends CoStar Discontinue Certain Claims for Website

Jul 9, 2024 11:00 AM ET

New York, NY – July 9, 2024 – In two Fast-Track SWIFT challenges brought by Move, Inc., BBB National Programs’ National Advertising Division recommended CoStar Group discontinue certain claims relating to the volume of traffic to CoStar’s website,, including:

  • “ just reached 156M monthly unique visitors.”
  • “ now has DOUBLE’s traffic.”

Fast-Track SWIFT is an expedited process for single-issue advertising cases brought to the National Advertising Division (NAD).

In the first challenge, Move challenged CoStar’s monadic claims about traffic to NAD recommended that those claims be discontinued because the claims conveyed a message that attracts 156 million monthly unique visitors when that figure was based on combined total traffic, calculated using Google Analytics, for 16 other CoStar websites. According to Google Analytics, itself has 110 million monthly unique visitors.

In the second challenge, NAD considered the accuracy of the challenged comparative claim that “ now has DOUBLE’s traffic.” NAD determined that this claim is not supported and recommended that it be discontinued because’s claimed 110 million monthly visitors are not “double” the 66 million unique visitors claimed by NAD declined to reach the question of whether Google Analytics and Adobe Analytics, both site centric data gathering tools, could both be used together to make a single comparison of website visitors.

NAD noted that nothing in these two decisions precludes CoStar from making other truthful and non-misleading claims about the number of unique visitors to its websites collectively, or to any of its individual websites, or comparative claims about’s traffic.

In its advertiser statement, CoStar stated that it will comply with NAD’s recommendations.

All BBB National Programs case decision summaries can be found in the case decision library. For the full text of NAD, NARB, and CARU decisions, subscribe to the online archive. This press release shall not be used for advertising or promotional purposes.

About BBB National Programs: BBB National Programs, a non-profit organization, is the home of U.S. independent industry self-regulation, currently operating more than a dozen globally recognized programs that have been helping enhance consumer trust in business for more than 50 years. These programs provide third-party accountability and dispute resolution services that address existing and emerging industry issues, create a fairer playing field for businesses, and a better experience for consumers. BBB National Programs continues to evolve its work and grow its impact by providing business guidance and fostering best practices in arenas such as advertising, child-and-teen-directed marketing, data privacy, dispute resolution, automobile warranty, technology, and emerging areas. To learn more, visit

About the National Advertising Division: The National Advertising Division of BBB National Programs provides independent self-regulation and dispute resolution services, guiding the truthfulness of advertising across the U.S. The National Advertising Division reviews national advertising in all media and its decisions set consistent standards for advertising truth and accuracy, delivering meaningful protection to consumers and leveling the playing field for business.

Jennie Rosenberg
Media Relations
BBB National Programs