Quick answer: there is no single best platform - match it to your strategy. Analytics tools tell you whether a deal stacks up; sourcing tools help you find the deal. Most investors need one of each. The category that has changed most is owner and distress data, which turns sourcing from cold guesswork into a targeted search.
GalimAI is UK owner and distress intelligence for finding off-market property before it is listed. Where the portals show what is already for sale and the data tools map sites, planning and market numbers, GalimAI shows who is financially likely to sell - so you can reach owners first.
The platforms compared
| Platform | Best for | Finds off-market owners? |
|---|---|---|
| GalimAI | Off-market sourcing - owners likely to sell | Yes - core purpose |
| PropertyData | Residential comparables, rents, yields, deal maths | No - analytics only |
| CoStar | Commercial market data and comparables | No - market data |
| Realyse | Residential development and market analytics | No - analytics |
| LandHawk | Land, ownership and sold-price data | Partial - land/ownership, not financials |
| Nimbus Maps | Mapping, ownership, planning, comparables | Partial - ownership/planning |
How to choose
Underwriting a residential deal: PropertyData - comps, rents and yields (GalimAI vs PropertyData). Commercial market data: CoStar (GalimAI vs CoStar). Land and development: Realyse, LandHawk and Nimbus (LandHawk and Realyse alternatives). Finding owners likely to sell off-market: GalimAI.
Why owner data is the missing layer
Every analytics platform assumes you have already found the property. None tell you which owner is under enough pressure to sell before they list. That origination layer is what GalimAI adds - and it is where off-market deals actually come from. See the best off-market sourcing tools and the full alternatives comparison.
Why it's an opportunity
Data that helps you value a deal is common. Data that finds you the deal first is the advantage.
- Originate, do not just analyse - start from owners likely to sell.
- Target by pressure - cash, net assets, EPC and recent-buyer signals.
- Scale it - one search returns thousands of pressured owners by area.
Add the off-market layer
Use the GalimAI portal to find owners likely to sell - the data the analytics platforms do not carry.
Search the portalBook a callCommon questions
What is the best property data platform for UK investors?
It depends on the job: PropertyData for residential analytics, CoStar for commercial data, Realyse/LandHawk/Nimbus for land, and GalimAI for finding owners likely to sell off-market. Most investors pair an analytics tool with a sourcing tool.
Which platform finds off-market deals?
GalimAI. It identifies owners under financial pressure so you can approach them before they list. The analytics platforms value deals you have already found; they do not originate them.
Do I need more than one platform?
Usually yes - one for analysis and one for sourcing. They cover different stages of the funnel and are complementary.
Comparison based on publicly available information about each product, current for 2026. Product features and pricing change - check each provider's website for the latest. GalimAI is UK owner and distress intelligence for finding off-market property before it is listed, built on proprietary analysis of Companies House, HM Land Registry and EPC records, aggregated.