UpScale.build vs Feasly: what happens to the model after you buy?

Feasly is dedicated feasibility modelling software. Almost every comparison of the two products argues about modelling depth, which is the wrong axis — a spreadsheet can model deeply too, and that has never been the thing that goes wrong.

The thing that goes wrong is the handover. A model wins you the site and the finance, then stops being the document anyone reads. Eighteen months later the question is whether the margin you were funded on still exists, and nobody can answer it from the model because the model was never updated and delivery was never read against it. That gap is what this page is about.

A model is a statement about the future. A budget is a commitment you are measured against. They look like the same numbers on the day you exchange, and they stop looking alike about a month later, when the first variation is priced and the first claim is certified against something.

A dedicated modelling tool is under no obligation to solve that — it is not what it is for, and holding it against the product would be unfair. But it does mean that if you are the one carrying the risk through delivery, a second system has to exist, and the moment there are two systems there are two versions of the truth and no rule about which one wins.

UpScale.build’s answer is to refuse the handover. Approving a feasibility writes it into an Original Budget that cannot be edited, and everything afterwards — tenders, progress claims, variations, the site diary, the funder pack — is read back against that one frozen position. There is exactly one version of what you committed to, because there is only ever one document.

Buy the specialist if modelling is the job and the job ends there: you underwrite deals you do not deliver, you need appraisal depth nothing else gives you, or your delivery stack already works and you have no wish to move it. That is a legitimate position and no amount of baseline-freezing changes it.

Come here if you are still holding the risk after settlement and you want the number that justified the site to be the number delivery is measured against.