When "Use All the Portals" Doesn't Actually Work
The standard advice for a UK rental search is to set up rental alerts across Rightmove, Zoopla and OpenRent, then OnTheMarket and a couple more on top, and check them all. In practice that is a tab-management exercise: six saved searches built at different times against drifting criteria, six inboxes lapping each other with "new property matching your search" emails, the same flat surfacing three times in twenty minutes.
If you have come from our piece on rightmove alerts not working or the head-to-head in Dwellio vs Rightmove alerts speed, you already accept that no single portal's built-in alert system catches the whole market. The argument here is the next step: a property alert app that covers all portals is not a faster, broader Rightmove saved search. It is a structurally different tool, doing structurally different work.
That distinction matters because most renters reach for the wrong shape of solution. They open more tabs, add a Zoopla alert on top of the Rightmove one, sign up to OpenRent "just in case". Duplicates pile up, criteria drift apart, and after a month they are back to refreshing Rightmove and hoping.
What "Covering All Portals" Actually Requires
A real multi-portal alert app has to do six things no individual portal can do for you.
1. Poll each portal independently. Real multi-portal rental alerts cannot piggy-back on any portal's pipeline — no portal's alert system surfaces another's listings. The app fetches each portal's live results on its own cycle.
2. Deduplicate at the address level, not the URL. The same flat appears on Rightmove and OnTheMarket simultaneously a meaningful share of the time. URL-based deduplication never sees this — the URLs are completely different. Address-level matching is harder, because portals obscure the full address until enquiry, but it is the only way to turn six feeds into one signal.
3. One search definition, applied to every source. Single dashboard rental alerts mean one place where you say "two-bedroom flat, north London, under £2,200" and that definition gets translated into each portal's filter language — not six saved searches that have quietly drifted apart by week six.
4. Normalise the filters. Rightmove's "flat" is OpenRent's "apartment" is SpareRoom's "room in a flat". PrimeLocation handles studios differently to OnTheMarket. Distance radii are measured from slightly different centroids. A real aggregator absorbs those differences.
5. Honest coverage of landlord-direct supply. OpenRent's free tier does not syndicate to Rightmove. SpareRoom indexes flatshare inventory nobody else carries. Leaders has regional pockets the bigger portals largely skip. A tool that claims to cover all portals but quietly drops OpenRent or SpareRoom is doing an easier subset and counting on you not to notice.
6. Resilient delivery. All portal property notifications need to land. Email and push, in parallel, with a cooldown so a busy hour does not fire fifteen alerts in three minutes. The receiver only cares the alert arrived, once, while the listing was still fresh.
Stacked together, those six are a different category of system from anything inside a portal settings page.
What the Coverage Data Actually Shows
The cleanest evidence comes from smaller markets, where our scrapers capture every Rightmove listing in a single pass without hitting the per-pass pagination cap. Three examples, refreshed May 2026:
| City | Total tracked | Rightmove | OpenRent | OnTheMarket | SpareRoom | PrimeLocation | Leaders |
|---|---|---|---|---|---|---|---|
| Hull | 1,791 | 963 | 268 | 156 | 159 | 85 | 160 |
| Bath | 1,211 | 590 | 213 | 100 | 161 | 147 | 0 |
| Hartlepool | 526 | 177 | 122 | 81 | 42 | 104 | 0 |
Rightmove is the largest single portal in each city — but only about half the listings we track in Hull and Bath, and roughly a third in Hartlepool. The second, third and fourth portals combined consistently match or exceed it. A renter on Rightmove-only alerts in Hull is watching 963 of 1,791. The other 828 sit on portals Rightmove will never mention.
London is the most extreme case in our dataset, with OpenRent as the largest single portal for landlord-direct supply: its free advertising tier does not syndicate to Rightmove and London has a disproportionately high direct-landlord share. Every public industry source agrees on the qualitative pattern. Birmingham, Manchester, Bristol, Oxford and Cambridge sit between the two poles: Rightmove typically the largest single portal, OpenRent the clear second. Exact ratios are sensitive enough to scraper methodology that we no longer quote them.
Why a Single Portal Cannot Patch Itself Into Being Multi-Portal
The natural follow-up: why doesn't Rightmove just index the others? Or Zoopla? It is technically possible. It is commercially impossible.
The portals are in direct competition for agent inventory. Rightmove will not surface OpenRent's free-tier listings — OpenRent's paid upgrade does syndicate to Rightmove, but the free landlord-direct supply that is most of its inventory does not. OnTheMarket's "Only With Us" scheme explicitly forbids dual-listing for 24 hours, and that scheme is the entire commercial proposition behind the portal. Data licensing between portals does not exist in any form that would support real-time aggregation.
A UK rental aggregator alerts product has to sit outside the portals to do its job. That is not a workaround — it is the only shape the work fits into.
How to Evaluate a Multi-Portal Alert App
If you are shopping for one — ours or anyone else's — these are the questions worth asking, roughly in the order they expose weak products:
- Which portals, named? "The major portals" is not an answer. If a tool covers four of the six and skips OpenRent or SpareRoom, fine — but you should know it before you sign up.
- How is deduplication done? Address-based is the bar. URL-based is meaningless for the cross-portal case. If the seller cannot describe how it works, it is probably URL-based.
- How often does it poll? Hourly is too slow in any competitive market. Every fifteen minutes is the working floor. "Real-time" without a number behind it usually means hourly.
- Email, push, or both? Both. Email survives bad phone settings; push survives Gmail's Promotions tab. Either alone has a known failure mode.
- One search definition, or one per portal? A single saved area applied to every source is the whole point. If you have to re-enter criteria per portal, you have a tab aggregator, not a multi-portal tool.
- Trial without a card, reasonable price? Sub-£15 a month is the going rate. Anything demanding a card before you see the product is selling on commitment.
A wider category roundup scoring UK options against this checklist sits in best property alert tools UK 2026.
Where Dwellio Sits Against That Checklist
Dwellio covers six named portals — Rightmove, OnTheMarket, OpenRent, SpareRoom, PrimeLocation, and Leaders. Zoopla is not currently in the set. Deduplication is address-based across all six. The polling cycle runs every fifteen minutes, twenty-four hours a day. Notifications go by email and push in parallel. One saved-search definition per area applies to every source. The trial is fourteen days with no card required; after that it is £9.99 a month, cancellable any time on the subscriptions page. Companion pieces: instant Rightmove alerts on the batch-vs-real-time question, and alternatives to Rightmove on what each portal carries.
Frequently Asked Questions
What property alert app covers Rightmove, Zoopla, and OpenRent in one place?
No single UK app covers all three at the same fidelity — Zoopla's terms restrict third-party indexing more tightly than the others. Dwellio monitors Rightmove, OnTheMarket, OpenRent, SpareRoom, PrimeLocation, and Leaders in one address-deduplicated stream, but not Zoopla. Zoopla overlaps heavily with Rightmove for agent inventory, so the unique-coverage cost of skipping it is small, and OpenRent picks up the landlord-direct supply.
Is there a UK rental aggregator that sends one alert per property instead of one per portal?
Yes — that is what cross-portal deduplication is for. A UK rental aggregator alerts product worth using matches listings by address rather than URL, so the same flat appearing on Rightmove and OnTheMarket fires one notification, not two. Dwellio does this across all six portals. URL-based deduplication, the default in most scrapers, will not catch cross-portal duplicates because the URLs are completely different.
Why do I get duplicate property alerts from different sites?
Because each portal indexes the same listing independently, and most agents publish to several at once. A flat listed across Rightmove, Zoopla, OnTheMarket and OpenRent fires four alerts within minutes. There is no shared deduplication between portals. The only way to collapse those four into one is an aggregator that matches at the address level.
How often should a property alert app check for new listings?
Hourly is too slow in any competitive UK city. The working floor for multi-portal rental alerts is every fifteen minutes, which puts you in the first wave of enquiries even on the busiest days. Single-portal Instantly settings, like Rightmove's, are batched and routinely arrive hours after a listing goes live, sometimes a day or more — which is where the speed gap between built-in alerts and a dedicated app opens up.
Can I get OpenRent alerts without creating an OpenRent account?
Yes, via an aggregator. OpenRent's own alerts require an OpenRent account and a saved search inside the site. A multi-portal alert app polls OpenRent on its own cycle, so its listings arrive in the same stream as Rightmove and the others. This matters most in cities with a high direct-landlord share — London especially — where OpenRent is the largest single portal for that supply.
Is there a property alert app for all UK rental sites?
No app covers literally every UK rental site — dozens of small regional portals are not commercially worth indexing. The practical question is whether it covers the six majors: Rightmove, OnTheMarket, OpenRent, SpareRoom, PrimeLocation, and Leaders. Together those carry the overwhelming majority of UK rental supply a typical renter would consider. Dwellio covers all six in a single dashboard rental alerts stream, with address-level deduplication so each property fires one notification.
The Bottom Line
A property alert app that covers all portals is not Rightmove plus extras. It is a different category of tool, sitting outside the portal layer because that is where the work fits. Single-portal alerts tell you about one portal's listings. Multi-portal rental alerts turn a fragmented six-portal market into a single signal, deduplicated, normalised, delivered once per property. They are not faster versions of the same thing.