Rightmove has removed claims about the number of properties advertised on its website following a challenge from rival property search platform MyPorta.

The portal previously advertised “over 900,000 properties for sale” and “over 200,000 properties to rent”.

MyPorta alleges the figures lacked supporting evidence and could have misled consumers about Rightmove’s market coverage.

According to MyPorta, archived records show the sales claim dates back to April 2010. The rental figure appeared in July that year.

Both descriptions reportedly remained in use in 2026.

MyPorta challenged the claims in September. Rightmove subsequently changed the wording.

However, the changes do not establish that the original figures were inaccurate.

Rival questions Rightmove’s claims

Mel McCollin, founder and chief executive of MyPorta, questioned why the descriptions had remained in use for so long.

“We regard these as clearly misleading claims. Rightmove claimed it had 1.1m properties for sale and to rent. Consumers were entitled to take those words at face value.

“To find the same promises in archives from 2010 still being used without any proof in 2026 is deeply troubling.”

McCollin also questioned whether the claims had influenced competition between property portals.

“How much more successful might challengers such as OnTheMarket and Zoopla have been if consumers had understood that they needed to look beyond Rightmove to see what else was available?”

Questions over listing figures

The dispute centres on whether Rightmove could substantiate its advertised property numbers.

MyPorta argues that portals should provide evidence to support claims about their listing volumes.

McCollin said: “Truth, trust and integrity are important attributes for any business, let alone one that wishes to remain a market leader.”

He added: “In the AI world it is not good enough to simply make unsupported claims and hope that no one notices.”

MyPorta has not provided independent evidence establishing Rightmove’s actual listing numbers when the descriptions appeared.

There has been no regulatory finding that Rightmove’s advertising was misleading.

EYE has approached Rightmove for comment.