How to stop data leaks in Microsoft Copilot
Copilot sits inside the Microsoft 365 workflow, so Word content, Excel ranges, and Outlook threads flow into prompts. Enterprise data boundaries depend on which Copilot experience is used, and employees rarely check. LeakSnitch watches this surface locally so sensitive data never reaches Microsoft Copilot.
Short answer
Microsoft Copilot is an AI platform from Microsoft. LeakSnitch scans text inputs, file uploads, and drag and drop content on copilot.microsoft.com with publicly auditable patterns, and blocks or redacts sensitive data before the request is submitted. Detection runs entirely on the device and takes under 50 milliseconds.
The most common Microsoft Copilot leaks
- Excel ranges with salary or customer data
- Email threads with external party details
- Azure connection strings and keys
How LeakSnitch protects Microsoft Copilot
- 1Install the browser extension from the Chrome Web Store. It activates automatically when you visit copilot.microsoft.com.
- 2Every prompt you type, paste, or upload is scanned locally against 55+ public patterns covering API keys, passwords, tokens, PII, and internal data.
- 3Context signals and entropy analysis score each match, and checksum validators confirm high stakes identifiers like credit cards and Aadhaar.
- 4When sensitive data is detected, LeakSnitch blocks or redacts the submission in under 50 milliseconds, before it reaches Microsoft Copilot.
Frequently asked questions
Does LeakSnitch work on Microsoft Copilot for free?
Yes. The free individual tier includes full detection on Microsoft Copilot and every other supported platform, with no limits on the number of AI tools you use.
Can Microsoft Copilot read data LeakSnitch blocks?
No. LeakSnitch intercepts the submission before it is sent, so blocked or redacted data never reaches Microsoft Copilot, its provider, or third parties.
Is Microsoft Copilot usage monitored without permission?
LeakSnitch only activates on the text you type into supported AI platforms. It never reads browsing history, other sites, or content outside the AI page. In enterprise deployments, admins set the policy and users see every detection in the modal.
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