OnTheMarket last night announced that it has cracked the 5,000 membership barrier, after recruiting 800 new branches since the start of the year. It reiterated it is on course to topple Zoopla from second place behind Rightmove.

OTM said the 5,000 branches now contracted to it represent some 2,500 agent firms. It said 90% have removed their listings from Zoopla.

The 5,000 figure was its ambitious target at launch on January 26.

OTM has now reached the milestone rather later, just over two months of going live.

However, OTM’s pace of recruitment since the start of the year seems to lay down a new marker.

Yesterday’s announcement said that OTM’s member offices “have moved their properties and their substantial advertising spends from other property websites”, and emphasised that OTM does not accept online “agents” – these are OTM’s quote marks, not ours.

The statement also said that “more and more” OTM agents are advertising new properties exclusively on OTM at least 48 hours in advance of displaying them on any other property portal.

It added: “OnTheMarket.com has already become a ‘must-view’ website with a unique set of properties because many of the properties on its website cannot be found anywhere else.”

The announcement also emphasised its traffic – saying that it had 2m unique visitors to the site within six weeks – and underlined that as a mutual organisation, OTM does not need to “feed dividends to external shareholders”. Both Rightmove and Zoopla are public companies.

Chief executive Ian Springett said: “OnTheMarket.com hit the ground running and is now an essential destination for anyone seriously in the market for residential property.

“We have come a long way in just a few weeks and, with more than 800 new member offices already added in 2015, we are more confident than ever that we will replace Zoopla as the number two player in the market over the coming year.”