Effective date: April 8, 2026
Chartissimo LLC ("Chartissimo," "we," "us," or "our") operates the Chartissimo web application and related services at chartissimo.com. This Privacy Policy explains what information we collect, how we use it, and the choices you have.
By using Chartissimo, you agree to the collection and use of information as described in this policy. If you do not agree, please do not use the service.
The key thing to know: Your spreadsheet values stay on our servers and are never sent to any AI provider. When we generate styled charts, only abstract geometric shapes (bars, lines, pie slices) are sent to the AI — never your actual data values, labels, or source information.
When you sign in with Google OAuth, we receive and store your name, email address, and profile photo from your Google account. We do not receive or store your Google password. Google handles authentication directly — we only receive an authorization token confirming your identity.
When you paste spreadsheet values into Chartissimo, those values are transmitted to and stored on our servers. We use this data to generate chart geometry (bars, columns, lines, pie slices) and to maintain your chart history so you can revisit and rework previous charts.
The styled chart images that Chartissimo produces are stored on our servers as part of your chart history. These images are associated with your account so you can access, download, and rework them later.
We collect anonymized usage data including page views, feature usage, and scroll depth. This data is collected via the Google Analytics 4 (GA4) Measurement Protocol on the server side. A client ID is stored in your browser's localStorage (not in cookies) to associate usage events across sessions. This data helps us understand how Chartissimo is used and where to focus improvements.
All payment processing is handled entirely by Stripe, which is PCI Level 1 certified — the highest level of payment security certification. We never store credit card numbers, CVVs, or full card details on our servers. We store only your Stripe customer ID and subscription metadata (plan type, billing period, subscription status) to manage your account.
We want to be very clear about what happens to your data when you generate a styled chart:
This architecture means that even if a third-party AI provider were compromised, your underlying data would not be exposed.
We use the information we collect for the following purposes:
We do not sell your personal information. We do not use your chart data to train AI models. We do not share your data with third parties for their marketing purposes.
Chartissimo relies on the following third-party services to operate. Each service receives only the minimum data necessary for its function:
Your data is stored using the following infrastructure:
We use HTTPS for all data in transit. Database access is protected by row-level security policies that ensure users can only access their own data. We follow security best practices, but no method of transmission or storage is 100% secure. If you become aware of a security issue, please contact us immediately at team@chartissimo.com.
Chartissimo does not use cookies — not first-party, not third-party, not tracking cookies of any kind.
We do use browser localStorage for two purposes:
You can clear localStorage at any time through your browser settings. Doing so will sign you out and reset your anonymous analytics ID.
We retain your account data and chart history for as long as your account is active. If you delete your account, we will remove your personal data within 30 days. Some data may be retained in encrypted backups for a limited period beyond that, but will not be actively used.
If you need your data deleted immediately, contact us at team@chartissimo.com and we will process your request as quickly as possible.
You have the right to:
To exercise any of these rights, email us at team@chartissimo.com. We will respond within 30 days.
If you are a California resident, the California Consumer Privacy Act (CCPA) provides you with additional rights:
We do not sell personal information. Chartissimo has never sold personal information and has no plans to do so. There is no need to opt out because there is nothing to opt out of.
We will not discriminate against you for exercising any of your CCPA rights. To submit a request, email team@chartissimo.com.
Chartissimo is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe a child under 13 has provided us with personal information, please contact us at team@chartissimo.com and we will delete that information promptly.
Chartissimo is operated from the United States. If you are accessing the service from outside the US, please be aware that your data will be transferred to, stored, and processed in the United States. By using Chartissimo, you consent to the transfer of your data to the US and the processing of your data under US law.
We may update this Privacy Policy from time to time. When we make changes, we will update the "Effective date" at the top of this page. For significant changes, we may notify you via email or through a notice in the application. We encourage you to review this page periodically.
If you have questions about this Privacy Policy, your data, or your rights, contact us at:
Chartissimo LLC
California, United States
team@chartissimo.com