SheetDelta
Published by Flamingo Research & Development GmbH
Microsoft Excel Office.js add-in from Flamingo Research & Development GmbH (marketplace title SheetDelta — see what changed in your workbook, AppSource WA200012038, publisher Flamingo Research & Development / PN200007472, builtFor Microsoft 365, AppVersion 1.1.0.0) that installs from the Microsoft Marketplace Excel add-in store and opens a task pane that compares the open workbook against the file as it was when opened, naming every changed cell and every formula replaced with a typed-in number, without writing to the workbook. Marketplace title SheetDelta — see what changed in your workbook | Microsoft Marketplace (https://marketplace.microsoft.com/en-us/product/office/WA200012038 HTTP 200): SheetDelta by Flamingo Research & Development; Get it now (CTA_Get). Marketplace JSON (https://marketplace.microsoft.com/view/app/WA200012038?country=US HTTP 200): appActionType FREE; hasPrices false; additionalPurchasesRequired true; WorksWith Excel_2016_Mac, Excel_2019_Mac, Excel_Online, Win32_Excel, Excel_M365_Mac, Excel_M365_Win; ReleaseDate 2026-09-11; AppVersion 1.1.0.0; SupportLink https://sheetdelta.com/support; PrivacyPolicyUrl https://sheetdelta.com/privacy; determinedStorefronts Appsource; linkedAddIns empty; short description See what changed since you opened a workbook including formulas. Marketplace description: Open a model, work on it, and SheetDelta tells you exactly what moved — which cells changed, and which formulas were replaced with typed-in numbers; that last one is the mistake that survives review and breaks a model quietly, whether a person made it or an AI assistant did; everything here runs on your own machine, with no account: nothing is uploaded and nothing is stored; the workbook is read, never written — SheetDelta points at cells using Excel's own selection, so there are no highlights to clear, no undo entries, and nothing to clean up afterwards; changes since you opened (named ranges, charts, pivots, VBA and protection settings as well as cells); 87 risk checks for totals that do not reconcile, hardcoded constants inside formulas, inconsistent ranges, broken references, missing documentation; formula inventory grouped by complexity; a paid SheetDelta hosted platform for teams which the pane links to; everything above is free, works without an account, and does not expire. Vendor product title Excel Add-in: See What Changed, Inside Excel | SheetDelta (https://sheetdelta.com/addin HTTP 200): Free on Microsoft AppSource, published by Flamingo Research & Development; Excel on Windows, Mac and the web; install Home › Add-ins, search SheetDelta, choose Add, or open the listing and choose Get it now; signed-out mode is free and entirely local (what changed since open, 87 risk checks, formula inventory, nothing uploaded, never writes to the workbook); signed-in mode can connect to the hosted team platform (published versions, cell-anchored comments, sign-off, shared control checks). Vendor pricing title Pricing: Free Comparison Tool, Team Review from $29 | SheetDelta (https://sheetdelta.com/pricing HTTP 200): the browser tool and the Excel add-in are free and available now; Free $0 compare two workbooks in the browser, no account; Team $29/user/mo hosted review on SharePoint and Team Plus & Business from $49/user/mo are in closed beta (intended prices, not a checkout). Vendor support title Support | SheetDelta (https://sheetdelta.com/support HTTP 200): hello@sheetdelta.com / support@sheetdelta.com. Vendor privacy title Privacy Policy | SheetDelta (https://sheetdelta.com/privacy HTTP 200): last updated 1 August 2026; Flamingo Research & Development GmbH, Ludwigstr. 5, 82319 Starnberg, Germany; signed-out Excel add-in runs entirely on the device. Marketplace Get it now is free to install; public Free $0 add-in HTML is live; paid Team HTML is the hosted SharePoint platform in closed beta. This listing is the Excel Office.js add-in SheetDelta WA200012038 — not the hosted SharePoint review platform, the free in-browser comparison tool, the CLI, or AI agents (MCP & CLI) as standalone products.
Price: Free tier
Platforms: Windows, Mac, Web
Excel versions: 2016, 2019, 2021, 365
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Formula Audit XL
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