Rightmove: The Market Leader
Rightmove is the UK's largest property portal with over 1 million listings and 2 billion page views per month. Around 95% of UK estate agents list on Rightmove, making it the most comprehensive source of properties for sale and rent. The search interface is functional and well-tested, with good map search, school overlay, and transport time filters.
Rightmove's key advantage is completeness — it's rare for a UK property to be listed for sale without appearing here. The sold prices section (sourced from Land Registry) is useful for researching an area. The main limitation is that Rightmove provides data but doesn't analyse it for you — you get the listing, but no independent assessment of value, risk, or neighbourhood quality.
Zoopla: Data and Estimates
Zoopla is the second-largest portal and differentiates itself with property value estimates (Zed-Index), price history graphs, and area statistics. The estimates are useful directional indicators but shouldn't be taken as accurate valuations — they can be 10–20% off, especially for unusual properties or those that have been significantly improved or neglected.
Zoopla's interface is cleaner than Rightmove's and offers features like 'SmartMaps' with area insights. Not all agents list on both Rightmove and Zoopla — checking both ensures you don't miss properties. Zoopla also powers the Hometrack data used by many mortgage lenders for automated valuations.
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Try free — 3 credits, no cardOnTheMarket: Exclusive Listings
OnTheMarket is the third major portal, founded by estate agents. Its key differentiator was originally exclusive 24–48 hour early access to new listings, though this has been relaxed. Some agents still list exclusively on OnTheMarket for an initial period before adding the property to Rightmove and Zoopla.
The user experience is straightforward and the portal tends to feature higher-end properties prominently. While it has fewer total listings than Rightmove or Zoopla, checking OnTheMarket ensures you catch any exclusives that haven't yet reached the other portals.
Why You Should Use All Three (Plus HomeThink)
Each portal can have listings the others don't — particularly in the first 24–48 hours of a new listing. Setting up saved searches on all three takes 10 minutes and ensures you see every available property in your area. Check Rightmove for completeness, Zoopla for area data and estimates, and OnTheMarket for potential exclusives.
None of the portals analyse the property for you. They show you the listing — but not the flood risk, crime data, lease length problems, comparable sold prices, or environmental issues that determine whether it's actually worth buying. That's what HomeThink does: paste any listing URL from any portal and get an instant AI analysis with red flags, fair valuation, and neighbourhood intelligence.
Key Takeaways
- ✓Rightmove has the most listings (~95% of agents list here) — it's the essential baseline
- ✓Zoopla adds property estimates and area data — useful for initial research
- ✓OnTheMarket may have exclusive early listings — worth checking for new instructions
- ✓Set up alerts on all three portals to ensure you don't miss any properties
- ✓None of the portals analyse risk or value — HomeThink fills this gap with AI analysis