Every tool behind an engagement, in your own hands.
One workspace for residential investment: measure the portfolio you hold, deploy capital to a mandate, find and value the homes that fit, and record the decision, with every figure traced to its source.
Real Viiyoo screen from a demo organisation. Addresses are replaced with descriptions.
Six jobs, one workspace.
What you hold, what you buy next and why you bought it live in one place, so each decision starts from the last one.
Know your book
Import the portfolio you hold, benchmark every home against market, LHA and your mandate, and model what-ifs.
02 · PlanDeploy to a mandate
Write or upload the mandate. Get a screened, underwritten, stress-tested plan and a committee pack.
03 · FindSearch and scout
Every live home in Great Britain on a map, by strategy or in a sentence, with scouts that never stop looking.
04 · ValueValue and underwrite
Calibrated values, rents from comparable lettings, the right stamp duty for each nation, and the area behind it.
05 · DecideRecord the decision
A decision drafted on pinned evidence, frozen with its pack and signed off by a second person.
06 · WatchKeep watch
Sales, certificates, planning, ownership and rule breaches on the homes you hold, as alerts and webhooks.
The screens, as they are today.
Every part an engagement uses will be yours to run, and your own AI agents can work from the same evidence through an MCP server and a versioned API. For agents and developers.
Real screens from a demo organisation. Addresses are replaced with descriptions.
Every figure tells you how sure it is.
Every value comes with a range and a confidence level, doubt is flagged rather than hidden, and no figure comes from AI. We test it all on homes that have sold, and publish the result.
median difference from the price paid where confidence is high
sale prices fell inside the range Viiyoo gave
median difference from the price paid, across every confidence level
average bias: Viiyoo values neither high nor low
Homes valued as they stood on the day they sold: 290 sales across 40 postcode districts in England and Wales, July 2025 to June 2026. Measured 28 September 2026.
Ready for the people who check the work.
Secure by default
Single sign-on through your identity provider with SCIM, or authenticator-app sign-in; visible sessions and an audit log owners can read.
Decisions with a second signature
A decision is frozen with its evidence pack and signed off by a second person. No API can sign one off.
Your brand on the work
Reports and emails carry your organisation's name and colours, powered by Viiyoo.
Books of real size
Portfolios of up to 20,000 homes; 10,000 assessed in about 80 minutes.
What is on the way.
Built, in progress or planned, and not yet switched on for clients. We say so rather than blur the line.
- HM Land Registry titles and official copiesFind a property's titles and buy official copies from a prepaid balance.
- Viiyoo inside Claude and ChatGPTConnect without a command line, listed in each assistant's directory.
- Valuations in Scotland, on requestMarket data already covers Scotland. Valuations draw on the Scottish sales register, a paid source, and are switched on for clients who need them.
- Engagement packs in WordEach engagement pack as a .docx as well as a PDF, for your own committee template. What comes next
Viiyoo is made by Proanex Ltd
A UK technology company registered in England and Wales (company number 17461523). Built on open and official UK property records.
Be first in when Pro opens.
Join the early-access list. If you want results sooner, order them as a Viiyoo engagement: the platform runs the same tools and hands back the finished work.