A Tuesday, 22:10. An enquiry lands on the three-bed. The negotiator sees it at 9:15 on Wednesday, rings, and the buyer has already viewed it. With another agent. On the Tuesday night.
At which point, in almost any office, somebody says it: "the portals send the same lead to five agents at once."
It is worth stopping there, because that is not what happens. And when the diagnosis is wrong, so is everything done about it.
The portal is not splitting your lead. The house is in five windows
We could not find a single source showing that Rightmove or Zoopla take one enquiry and share it out between agents. What does happen, every day, is two different things that feel identical from the desk.
One: the instruction is multi-agency. The seller has signed with two, three or five firms. It is entirely legal and, in some towns, routine. The house appears five times on the same portal, with five sets of photographs and occasionally five different asking prices. The buyer does not see five agents. They see a repeated listing, and they message whichever ones surface first. That is not one lead split five ways. That is five agents chasing the same buyer for the same house.
Two: multi-portal duplicates. The branch lists on Rightmove, Zoopla, OnTheMarket and its own site. The same buyer enquires through two or three of them, two or three records open in the CRM, and two negotiators from the same office ring the same person within the hour. There are tables circulating with very precise duplicate percentages attributed to "industry data". We went looking for the origin of those figures. Not one cites a source, so we will not repeat them.
The distinction is not academic. If the portal were the problem, the fix would be a different portal. Because the problem sits in the instruction and in the listing, the fix is something else.
The number that turns the argument round
TwentyEA analysed UK transactions between 1 April 2025 and 31 March 2026. They sell an acquisition product off the back of it, which is worth knowing, but the data is their own transaction base.
Of everything that sold in that period, 85.7% was sold by the first agent instructed. A further 8.5% by a replacement agent. Only 5.8% sold on a multi-agency basis.
Then the other side of it, which is the part that matters. The probability of a property selling at all was 61.1% with the first agent and 37.7% on multi-agency, against a market average of 57.9%. In Scotland, 95.2% sold with the first agent. Inner London was the outlier at 77.8%, with 12% multi-agency.
So the shared instruction does not only force you to compete for the same buyer. It is also less likely to sell.
What it costs, and what nobody publishes
Rightmove's half-year results, published on 31 July 2026, put average revenue per advertiser at £1,636 a month per branch, up from £1,520 in June 2025 — roughly £19,600 a year, per office, across 16,591 branches. Retention hit 96%, the highest in more than a decade.
Two other numbers from the same document are worth having. An average of nine enquiries per available rental property — down on 2025, but still above the pre-Covid average of six or seven. Nine enquiries, one fee. And, before anyone tells you that AI has eaten portal traffic: under 0.5% of Rightmove's traffic came from LLMs.
There is also a claim of up to £1.56bn against Rightmove at the Competition Appeal Tribunal, filed in April 2026, with a certification hearing due in November; Rightmove says it is without merit. Whatever the outcome, its existence tells you what agents make of the line item.
Answering first is necessary and it is not sufficient
Nearly everything written about this ends in the same place: reply within five minutes. Usually with a spectacular percentage attached — a 391%, a 21× — presented as a 2026 statistic.
It is worth knowing where those come from. They come from work by James B. Oldroyd, Kristina McElheran and David Elkington published in Harvard Business Review in March 2011, under the title The Short Life of Online Sales Leads. It is serious research. It is also fifteen years old, and it gets recycled into articles that mention neither the date nor the authors. We are not going to quote its figures, because the original is paywalled and we have not read it in full.
What can be said without buying anything: if the buyer has messaged three agents about the same house, the order of reply decides who views first. That part is real and it is yours. What speed does not fix is the structure underneath. Winning the turn does not win the instruction — it wins you the right to compete on a sale that, on TwentyEA's numbers, is considerably less likely to complete than the sole-agency one down the road.
Speed shares out a pie that has got smaller on its own.
What a chat cannot do in an estate agency
This part we have to write carefully, because we sell AI agents.
It cannot state material information. Since National Trading Standards published the full guidance in November 2023, listings are expected to carry Part A (price, tenure, council tax band), Part B (construction materials, services, parking, broadband and mobile coverage) and Part C (building safety, flood risk, restrictive covenants and easements, planning history, mining). None of that lives in a portal feed. A model that improvises it is inventing material information in beautifully fluent prose — and you are the one who has to stand behind it.
And the regime has teeth. The Digital Markets, Competition and Consumers Act 2024 has covered misleading actions and omissions since 6 April 2025, and information given in an unclear or untimely way can count as an omission. "Technically true, badly framed" is not a defence.
It cannot value. "What's my house worth?" is the first question in any valuation lead and precisely where a generative model invents with the most confidence. An imaginary bracket loses the instruction before the appointment.
It cannot pass on offers or negotiate. Estate agents not passing on offers is a search phrase with its own following. Automating it is a liability, not a feature.
It should not pretend to be a person. There is no UK rule that forces disclosure. If you also deal with buyers based in the EU, Article 50 of the EU AI Act applies from 2 August 2026 and requires it outright — we covered that here. In the UK, "Laura from the lettings team" is simply not a position you want to defend under the DMCC. We disclose because it also works better.
What you can automate
The hours. Portal enquiries do not arrive between nine and six — they arrive in the evenings and at weekends, a gap we have looked at before. Why do estate agents never call back is one of the phrases Google suggests on its own. That reputation was earned after hours.
The WhatsApp window. When the customer messages you first, a 24-hour service window opens, and replying inside it is free: Meta stopped charging for service conversations on 1 November 2024 and moved to per-message pricing in July 2025. What costs money is chasing them afterwards with a template — Meta raised UK marketing rates on 1 July 2026, with another update due on 1 October. The breakdown is here.
And plain deduplication: match on the phone number before dialling, so two negotiators from one branch stop ringing the same buyer.
Zatio is an AI agent that answers inbound enquiries on WhatsApp and website chat, qualifies them and books the appointment. In an agency that means covering the hours nobody is there, not the ones someone is. It says it is an AI in the first message, and hands over to a person the moment anything on the list above comes up. If you want to see it against your own listings, get in touch.