The iProperty Company – the portal which allows new homes developers and private sellers but bans estate agents – is to start an aggressive marketing campaign this spring.

It has also raised a question mark as to whether Rightmove and Zoopla will continue to accept listings from online agents.

By yesterday the company had raised £290,400 in its crowdfunding campaign, of which £200,000 was from one investor, and claims it has a “very big name” backer lined up.

The £500,000 it hopes to raise will give investors 6.25% of the company.

It also claims it will be to the property industry what Airbnb has been to travel.

The pitch to potential investors on Seedrs values the iProperty Company at £8m, and says it has more listings in the UK than any online agent. The campaign has 31 days to run.

Investment news site City am has recommended iProperty as a top pick.

The crowdfunding pitch describes the iProperty Company, launched in November 2012, as a global online property community which connects owners with buyers directly.

The pitch says: “With no need for estate agents, we enable individuals to buy, sell or rent their homes, absolutely free of charge. This saves both buyer and seller a great deal of time and money.”

It is also carrying an offer for anyone investing over £1,000 to receive a free For Sale or For Rent board.

Co-founders John Candia and Brian Blake, former boss of Swinton Insurance, says they are determined to “smash the hold that estate agents have on the property market” and that their site could soon rival Rightmove and Zoopla.

Candia said: “I know it’s a massive mountain to climb.

“Ultimately, though, I think that people who go to search on portals like Rightmove and Zoopa are guaranteed to be put in touch with an agent, and I’d like to build a site that does the total opposite.

“I’d like to guarantee anyone that searches on our site that they go straight to the owner, and I think ultimately we are on the right lines.”

Candia said he believes estate agents add no value to the property market.

“If anything, they hinder the operation,” he said.

“Dealing directly with people you get a true picture of what is going on. You’re not relying on someone in the middle.”

He said home owners know what their property is worth, and if in any doubt can buy a valuation from Hometrack for £19.95.

On the Seedrs pitch, in a Q & A section, Candia says: “It’s important to note that most of the online agencies rely heavily on search being provided by a third party which in my view is a risk.

“Currently in the UK online agencies only account for 2% of advertisers on Rightmove and Zoopla. What happens if they change their policy to appease the growing discontent from traditional agents who incidentally make up close to 90% of their advertising revenue?”

The iProperty Company claims to have over 8,000 properties listed in the UK, more than any online agent.

However, almost all the properties currently listed on the iProperty Company website are not private sales but homes being marketed by developers, after a deal last year with the National House Building Council. Developers using the site include Barratt, Bovis and Persimmon.

iProperty insists it is not an online agent. It will monetise itself by offering additional services such as For Sale boards and photography.

It was Tesco’s provision of sales boards when it tried to get into the private sales market that helped land the supermarket’s model in trouble, as it would have been deemed to be an estate agent.

The SellingUp website which carries advertising from both Tepilo and HouseSimple, but which also has an OnTheMarket map of agents, has more here