In its first set of results delivered to the stock exchange, Zoopla this morning shrugged off any possible threat posed by OnTheMarket.

Zoopla said the launch of Agents’ Mutual’s portal in January “may have some short-term impact on our agency membership numbers but we have seen numerous launches into our market before and taken effective action to compete with them.

“Longer term we remain very confident in the value proposition we provide to both our members and consumers, which underpins our long term growth.”

Zoopla also said it did not expect political and economic challenges within the overall housing market to have a material impact on its business.

Expanding on the subject of OnTheMarket in a section on principal risks and uncertainties, Zoopla said: “If Agents’ Mutual successfully launches in 2015 with its proposed restrictive advertising provision, a portion of the Group’s existing members may terminate their subscriptions with the Group.

“The launch of Agents’ Mutual may also result in fewer consumers using the Company’s websites, a loss of advertisers and a loss of market share for the Group.”

Zoopla outlined how it would mitigate these risks, including increasing revenue from online agents.

Zoopla also said that another risk was the possibility of losing a “number of qualified employees to competitors, new entrants or otherwise”. It said it would mitigate this risk by offering good pay and career prospects.

An upbeat Zoopla told the City it had grown its audience to record levels.

Reporting for the year to the end of September 30, Zoopla said it now has 19,663 members listed with it, up 5% on a year ago, including 16,373 UK estate and lettings agency branches and 2,715 new home developers. Zoopla said the numbers represent “close to 90% of the total number of property professionals in the UK”.

The number of visits to its site was up 33% year on year, and the number of leads to its advertisers was up 12%. It also earned 18% more from its advertisers. Revenue was £80.2m, up 24% from the previous year’s £64.5m.

The business made an adjusted profit of nearly £26.7m. June’s flotation on the stock market cost £5.6m.

CEO Alex Chesterman said: “I am pleased to present such a strong set of full year results following our successful IPO in June.

“2014 has been a landmark year for Zoopla Property Group with record audience levels and strong revenue growth across all areas of the business as consumers continue to recognise the importance of the Group’s services for searching and researching the property market at work, at home and on the move.

“We continue to deliver enhanced transparency and efficiency to the market and to develop a world-class consumer proposition designed to aid our users with their property search, increase engagement and drive value for our members.

“We enjoyed record levels of traffic to our websites and mobile applications with 42.8m average monthly visitors generating over 29m leads during the year providing an excellent value proposition for our members and resulting in increased take-up of our additional premium products.

“We remain committed to our mission of building our brands and business to provide the most useful property resources to consumers along with being the most effective partner for property professionals across the UK.”