ChartKit

Privacy

Privacy Policy

Effective date: February 16, 2026.

Information we collect

When you sign in with Google, we collect your email address to create and manage your account. We also collect:

  • Subscription data — plan type, trial status, and billing period dates.
  • Feedback — text you voluntarily submit through the in-extension feedback form, along with the associated chart configuration.
  • Preferences — theme colors and onboarding state, stored locally on your device.

Chart data you create is stored as image alt-text within your Google Slides, Docs, or Sheets documents. This data stays in your Google account and is not sent to our servers unless you submit it as part of a feedback report.

Local data storage

ChartKit stores the following data locally on your device using the browser's extension storage:

  • Authentication tokens (access and refresh tokens) for maintaining your session.
  • A cached copy of your subscription status (refreshed every 24 hours).
  • Recent chart history (up to 30 charts per document URL) for quick re-editing.
  • Theme color preferences and onboarding completion state.

This data is not synced to external servers and is cleared when you log out or uninstall the extension.

How we use information

We use your data to deliver core functionality (chart creation and editing), manage your subscription and trial, respond to support requests, prevent misuse, and improve product performance and reliability. We do not use your data for advertising or user profiling.

Billing and payment data

Subscription payments are processed by Stripe. We do not store full payment card numbers on our servers. Stripe receives your email address and payment details to process transactions.

Data sharing and third-party services

We do not sell personal information. We share data with the following service providers, only as needed to operate ChartKit:

  • Google — authentication (OAuth sign-in with your email address).
  • Stripe — payment processing (email and billing details).
  • Supabase — account and subscription data storage (email, subscription status).
  • Resend — transactional emails such as trial and subscription notifications (email address).
  • Notion — feedback storage (feedback text and chart data you submit).

Data retention and security

We retain personal data only as long as necessary for service delivery, legal obligations, and legitimate business needs. We apply administrative, technical, and organizational safeguards to protect your data. All network communication uses HTTPS encryption.

Your choices

You may request access, correction, or deletion of your personal information. You may also stop using the service at any time and request account closure. Logging out of the extension clears locally stored authentication and session data.

Google API data use

ChartKit's use of information received from Google APIs will adhere to the Chrome Web Store User Data Policy, including the Limited Use requirements.

Policy updates

We may update this Privacy Policy from time to time. Material changes will be reflected by updating the effective date above.