Trust

How we handle your data

Published by Variance Works - Updated 5 August 2026

The short version: we do not. Your file never reaches us, because there is nowhere for it to go.

The promise

This site is a set of static pages. Once a page has loaded, all the work happens inside your browser, on your machine: reading your file, computing the effects, drawing the chart, building the Excel workbook. There is no server-side application to send anything to.

• No upload. The contents of your file are never transmitted anywhere.
• No account, no email, no sign-up, no trial.
• No cookies, no analytics, no tracking pixels, no third-party scripts, no consent banner to dismiss.
• No fonts from anyone else. The two typefaces are served from this site.
• Nothing kept on our side. There is no database and no account, so there is nothing left here when you close the tab. On your own machine, one thing can be kept, and only if you ask for it: a monthly review you choose to save. See What is stored.

Verify it yourself

Do not take our word for it. This claim is unusual enough that it deserves a check, and the check takes about two minutes.

1. Open the Network panel. In Chrome or Edge, press F12, or Ctrl+Shift+I (Cmd+Option+I on a Mac), then pick the Network tab. In Firefox, press F12 and pick Network.
2. Keep it open and use the tool end to end. Drop your file, map the columns, read the results, download the Excel export and the chart image.
3. Read the list. After the page assets have loaded, the only new entries you will see come from this site itself: the part of the tool that writes the Excel workbook, the first time you export, and the part that draws the chart image, the first time you download it. No request carries a row of your file, because none is ever made.

If your company has a proxy log, that is an even better place to check: the same conclusion, from a source you control rather than one we wrote.

What is stored

Nothing on our side, ever: there is no database, no account and no server that could hold your figures. What follows is only about your own browser, and it now depends on one choice you make yourself.

A one-off analysis stores nothing. Your file lives in the tab's memory while you work and disappears with the tab. Pressing Start over releases it immediately rather than at closing time.

A temporary monthly review stores nothing either. It keeps your source, your results and your pack together while the tab stays open, and closing that tab clears all of it. Nothing is written to the device.

A review you asked to keep is written to this device. That only happens after you click Keep it on this device on a review you named: never before, and never by default. It is stored in this browser's own database, on this computer, and it holds the file you imported, the column mapping you confirmed, the results you computed and the review pack you assembled. Keeping the file is what lets each analysis read it again later without asking you for it a second time.

Two consequences of that choice, stated plainly. It stays on that computer, in that browser: another machine, another browser, or a private window will not see it, and we cannot recover it for you any more than before. And a browser may clear its own storage on its own terms - low disk space, a privacy setting, a profile reset - so a kept review is a convenience, not an archive. Export the pack for anything you need to keep.

You can delete a kept review at any time, from the review itself: Delete this review removes its name, the file kept with it, every saved result and its pack. If your browser refuses local storage - private browsing, a locked profile - the app says so and offers a temporary review instead of pretending the save worked.

What the page does load

Being honest about this matters more than claiming zero requests. Loading the page fetches what any page fetches, all of it from this site: the HTML, one stylesheet, the application code, the two typefaces, an icon. Beyond that, code arrives only when you ask for it: the part that writes the Excel workbook, the first time you export, and the part that draws the chart image, the first time you download it. Both are large, and most visitors never need either.

The same rule applies to the tools themselves. Each tool is a separate piece of code, and it is fetched the first time you open it, not before. Opening Performance Trends fetches that tool; staying on the bridge never does. This is why the list in your Network panel grows as you move between tools, and it is the only reason it grows.

The monthly review workspace follows the same rule. It is the largest single piece, and it arrives when you open a review - not when you land on the home page. A visitor who only reads, or who runs one analysis and leaves, never fetches it.

That is the complete list. None of those requests contains anything from your file, and none of them goes to another company.

Why it is built this way

Sales data at product level is among the most confidential data a company holds. It carries prices, costs, margins and customer behaviour, and company policies rightly forbid pasting it into unfamiliar websites or chat tools. Most analysts have been told this, and most have done it anyway, because the alternative was an hour of careful copy-pasting in a fragile spreadsheet.

The only design that genuinely resolves that tension is one where the data physically cannot leave your machine. So that is the design we chose, and we made it verifiable rather than asking to be trusted.