Property decisions, backed by evidence.
Proanex builds software that turns the UK's official property records into answers you can defend: capital deployment plans, always-on market scouts and underwriting where every figure shows where it came from. Our flagship product is Viiyoo.
Flat 2, an Ealing mansion block
Report ready- 1Sold 3 months ago · 0.3 mi · 71 m²£629,500
- 2Sold 7 months ago · 0.4 mi · 64 m²£585,000
- 3Sold 10 months ago · 0.4 mi · 70 m²£640,000
Illustrative screen. Figures are examples.
Sources include HM Land Registry Price Paid, the EPC Register, the UK House Price Index, VOA Local Housing Allowance, Census 2021, the Environment Agency, planning.data.gov.uk and data.police.uk.
One workspace. One standard of evidence.
Viiyoo is where property professionals do the work, built on open and official UK records that every figure can be traced back to.
viiyoo
Flagship · by Proanex
Property intelligence, from first look to investment committee.
- Capital deployment plans from a mandate, with committee packs
- Scouts that watch the market and explain every match
- Valuation, underwriting, rent and portfolio assurance
The public record, joined up and traceable.
- Sales, energy certificates, rents, planning, flood and census data
- Matched to one record per property, with conflicts flagged
- Every value keeps its source and date
From capital to homes you can defend.
Most property tools stop at a search. Viiyoo plans the deployment, keeps watch for you, and lets your own AI agents work from the same evidence.
Write the mandate. Get the plan.
Budget, sleeves, tenures, grant and limits in; a screened, underwritten, stress-tested plan and committee pack out.
- Every exclusion gives its reason
- Up to seven stress scenarios and a first tranche
- A frontier of what the market can absorb
- Committee brief (PDF) and live workbook (Excel)
Scouts that never stop looking.
Your buy box, set up in plain English, watched on your schedule. Every new listing is underwritten and ranked.
- New matches, price cuts and homes gone
- A checked note on why each home matched
- "Not this area" becomes an exclusion you approve
- Scouts find and explain; people act
Works with your AI agents.
An MCP server and a versioned API, so the assistants your team already uses can work from Viiyoo's figures.
- 29 tools: assessments, portfolios, markets, scouts
- Every figure in an agent's draft checked
- Scoped keys, quotas and one-click pause
- Your files treated as data, never instructions
A figure you can't trace is a figure you can't use.
Property decisions are argued over in committees, credit meetings and client reports. So our software is built to be questioned.
Every figure shows its source.
Each fact carries the record it came from and when. A valuation lists the sales behind it; an area summary names the dataset it read.
Money maths is deterministic.
Stamp duty, yields, cash flow and stress tests run in tested calculation code, never in a language model. The same inputs always give the same answer.
AI explains. It doesn't invent.
AI writes the narrative only from evidence it has been given, and every claim must cite that evidence. Anything it can't support is held back.
See Viiyoo on a property you know.
We're opening Viiyoo to a small group of investors, lenders and advisers. Tell us what you'd like to test it on.