Noise and scaremongering from the detractors will only strengthen OnTheMarket, say grassroots supporters.

OTM yesterday afternoon released excerpts of letters written to it by member agents, pledging their support.

Ian Springett, chief executive of OTM, said: “We’ve said it before and we’ll say it again, OnTheMarket is here to stay and we know that our achievements to date, our continuing recent growth and the drive to succeed we share with our members are posing an unwelcome threat to some detractors who would benefit from our demise.

“If we didn’t pose a threat to them, they wouldn’t waste their time on us.

“The overwhelming majority of our member agents remain fully committed to OTM.

“The board, management team and staff remain focused on the strategic task of growing OTM into the best portal in the market for agents and consumer alike.”

Among the messages was one from Nick Manson, director of Mansons, a single-branch business in Jesmond, Newcastle, who said: “The recent noise and scaremongering will only make OTM stronger.

“I believe the recent negative comments are a result of those trying to undermine the incredible amount OTM has achieved since launch.

“We are receiving an increasing volume of traffic and quality leads from OTM and I remain a strong supporter.”

Michael Comyn, of Comyn & James in Pulborough, West Sussex, said: “It is very interesting that OTM is receiving the inevitable negative attacks from detrators – it certainly proves that they are having an impact on the portals market.”

Lana Michael, of single-office Kensington Estates in London, said: “I do not give undue attention to any negative stories I hear. I go with what I see for myself, and what I’ve seen from OTM so far, I have liked.”

Steve Moir, chairman of Property Sharing Experts in the south-west, said: “We remain amazed at the short-sighted view some agents and some quarters seem to take, and firmly believe it is in the long-term interest for agents to continue to support OnTheMarket.

“OnTheMarket is delivering good leads, considering it is still in its infancy, and we fully understood that we were taking a longer-term view.

“Property Sharing Experts as a group still fully support the portal. We are seeing an ever increasing number of quality leads, and as long as members continue to promote it then consumer awareness will continue to grow.”