The boss of challenger portal OnTheMarket has thrown down the gauntlet to Rightmove, saying “it is no surprise” that agents are deserting it.

Ian Springett said yesterday that Rightmove’s “whopping” profit margin of 75.9% had been maintained by price hikes to agents.

Its average revenue per advertiser per month is up £83 to £1,088 according to Rightmove’s latest results, for last year.

In an assertive email to OTM agents yesterday, Springett said that most, over 73%, of Rightmove’s revenue comes from agents’ fees.

Rightmove agency numbers last year slipped by 981 to 16,347, while OTM’s rose by almost the same number to 12,530.

Furthermore, said Springett in his email, Rightmove is producing fewer leads for agents than it used to, while OTM is producing more.

In 2015, Rightmove produced 210 leads per agent per month, while OTM produced 23. Last year, Rightmove produced 170 leads, while OTM produced 88 – a number which rose to 126 in January, it claims.

Springett also says that Rightmove’s leads are working out at 16 per £100, while £100 gets OTM agents 27 leads.

He says that OTM agents pay an average of £331 per month, less than a third of Rightmove’s average cost.

Springett said: “It is no surprise that the decline in the number of agents listing with Rightmove has accelerated. In 2018 they were down 298 offices compared with 2017, with the greatest reduction – 257 offices – in the second half of 2018.

“In 2019 Rightmove lost a further 981 offices, of which 560 were in the first half and 421 in the second half.”

Springett asked his agents “to help us help you”, including that they support the new & exclusive proposition, which means that properties are listed on OTM 48 hours before any other portal.

OTM has also announced renewed TV advertising as of this week, with slots in programmes including Crufts, Gogglebox and Midsomer Murders.