Privacy Policy

Your privacy is a core feature

We built SheetMind so your spreadsheet data never has to leave your control.

Last updated: February 17, 2026

Our three core commitments

Sheet data is never stored

Processed in memory, discarded immediately after each response.

Your data is never sold

We do not share, sell, or trade your data with any third parties.

We never train AI on your data

Your content is never used to train or improve AI models.

Overview

SheetMind ("we", "our", "us") is committed to protecting your privacy. This policy explains how we collect, use, and safeguard your information when you use our Google Sheets sidebar addon and website.

Data We Collect

Account data

When you create an account, we collect your name, email address, and authentication credentials. If you sign in with Google, we receive your basic profile information.

Sheet data (temporary)

When you send a message in the SheetMind sidebar, the relevant sheet data is sent to our backend for AI processing. This data is NOT stored permanently — it is processed in memory and discarded after the response is generated.

Conversation history

Your chat messages and AI responses are stored so you can resume conversations. Message content is associated with your user ID.

Usage data

We track anonymized usage metrics (message counts, feature usage, session data) via PostHog analytics. We never track the content of your messages or sheet data.

What We Never Do

  • Store your raw spreadsheet data permanently
  • Track the content of your messages or AI responses in analytics
  • Sell your data to third parties
  • Use your data to train AI models

PII Detection

You are always in control. SheetMind warns you before processing any data that may contain sensitive information.

SheetMind includes automatic PII detection. Before processing your sheet data, we scan for patterns that may indicate sensitive information (emails, phone numbers, SSNs, etc.) and display a warning banner. This detection happens before data is sent to external AI services — you decide whether to proceed.

Third-Party Services

Google AI (Gemini): For AI processing of your queries. Subject to Google's privacy policy.

Supabase: For database and authentication. Data stored with row-level security.

PostHog: For anonymized usage analytics. No message content tracked.

Data Security

We implement row-level security (RLS) policies on all database tables, ensuring users can only access their own data. All data is transmitted over HTTPS. Authentication tokens are securely stored and never exposed.

Data Retention

Account data is retained as long as your account is active. Conversation history is retained until you delete it or close your account. Sheet data is never retained — it is processed in memory and immediately discarded.

Your Rights

You have the right to:

  • Access your personal data
  • Delete your account and all associated data
  • Export your conversation history
  • Opt out of analytics tracking

Contact

Privacy questions?

We'll respond within 2 business days.

privacy@sheetmind.xyz

Also see our Terms of Service.