Block Copilot in Excel
Stop Microsoft's AI from accessing your spreadsheet data. Free forever.
Install Free from AppSourceThe Problem
Copilot reads your data without consent
Microsoft Copilot is embedded in Excel whether you want it or not. If your organization has a Microsoft 365 E3/E5 license, Copilot can access your spreadsheet data — formulas, cell values, named ranges — and send it to Microsoft's cloud for AI processing.
For IT administrators, this creates a compliance nightmare. Microsoft deprecated the Copilot-specific Group Policies that once gave admins control. The remaining policies are blunt instruments: they disable ALL AI features across ALL Office applications, not just Copilot in Excel.
For finance teams and accountants, Copilot introduces accuracy risk. Microsoft's own documentation warns that the COPILOT() function is "not designed for accuracy or reproducibility." In spreadsheets where precision matters — financial models, tax calculations, audit workbooks — unreliable AI suggestions are a liability.
For healthcare and legal professionals, the stakes are even higher. Patient data in Excel sent to Microsoft's AI processing could constitute a HIPAA violation. Legal workbooks containing privileged information could waive attorney-client privilege — as the Heppner ruling demonstrated with AI-processed documents.
The frustration extends to everyday users too. Copilot popups interrupt workflows. The Copilot icon takes up space in the ribbon. And Microsoft's 25-46% price increase for Microsoft 365 plans that include Copilot means you're paying more for a feature you may not want.
The Solution
Granular control, per workbook
SheetGuard's AI Blocker gives you granular control over Copilot — per workbook, not per organization. Toggle it on and Copilot is blocked at the preference and registry level. Toggle it off and everything returns to normal.
No Group Policy needed. No IT ticket. No waiting for admin approval. You control your own workbooks.
The deep block mode goes further: it generates PowerShell scripts that modify Windows registry keys to disable Copilot at the system level. IT admins can deploy these scripts across their organization for comprehensive protection.
Everything runs locally. SheetGuard never sends your data anywhere — not to our servers, not to any third party. Your spreadsheet data stays on your computer.