A Zoopla spokesman says that we have now seen dozens of members who left us to trial OnTheMarket return.
The claim came during the release of new traffic figures which show that traffic to Zoopla websites and mobile apps reached 50 million visits in March, with mobile access accounting for a record 62.6 per cent of all visits.
It says its audience on the Zoopla and PrimeLocation websites and mobile apps has been largely unaffected by the launch of OnTheMarket in January and according to its own internal data - confirmed by independent research firm Hitwise, - its traffic has been on average more than 25 times greater than OTM's.
It says the gap between the two portals widened during the three weeks up to Easter.
We are delighted with our continued strong audience levels and the value we are delivering to our members. It is a tough market and attracting a significant audience and delivering high levels of appraisal and applicant leads along with brand awareness for our members is what we are focused on says Lawrence Hall, head of communcations at Zoopla Property Group.
OnTheMarket's chief executive Ian Springett is not commenting on the claim of agents returning to Zoopla but insists that we continue to grow our membership on a daily basis.
He says that as a new portal OTM does not have the casual browser traffic enjoyed by Zoopla and Rightmove which means his focus is on attracting the much smaller number of active property-seekers in the market and generating good quality leads for our member agents.
He addss: Members tell us that leaving Zoopla has made no difference to their instruction-winning capability and that they are receiving at least as many good quality leads from their overall online presence as before.