Last updated: July 7, 2026
LangevinAI ("LangevinAI," "we," "us," or "our") is a financial analysis tool operated from Ontario, Canada. This Privacy Policy explains what information we collect through the LangevinAI web application (the "Service"), how we use it, and the choices you have.
If you have questions, contact us at contact@langevinai.io.
When you sign up, we (via our processors Clerk and Stripe) collect:
LangevinAI is designed to process your general ledger exports and supporting documents (Excel, CSV, PDF, Word, .eml files) only as needed to provide the Service to you:
We may collect standard technical/operational data: IP address, browser type, pages viewed, timestamps, and error logs (error messages and technical stack traces only — never the contents of your uploaded files), for security and reliability purposes.
We use the information above to:
We do not use the content of your uploaded financial data to train AI models, ours or, to the best of our knowledge and per our agreements with Anthropic, Anthropic's foundation models. See Section 5.
Where applicable, we process personal data under the following legal bases: performance of a contract (providing the Service you signed up for), legitimate interests (security, service improvement), and consent (where required, e.g. certain cookies).
We share information with the following subprocessors, each acting under its own data protection terms and, where applicable, a data processing agreement with us:
| Subprocessor | Purpose | Data shared |
|---|---|---|
| Anthropic (Claude API) | AI-powered classification, commentary, summaries | Account names, sampled transactions, document excerpts submitted per request; not retained by us |
| Vercel | Application hosting and serverless function execution | Request/response data in transit |
| Clerk | Authentication | Name, email, session data |
| Supabase | Plan/entitlement storage | User ID, plan tier, usage counters |
| Stripe | Payment processing | Billing/payment details |
We do not sell your personal information or your financial data to any third party. A current subprocessor list is available on request at contact@langevinai.io.
Depending on your location, you may have the right to access, correct, delete, or export your personal data, or to object to or restrict certain processing. To exercise these rights, contact contact@langevinai.io. Because we do not retain your uploaded financial data server-side, most such requests will concern your account/billing information.
If you are in the EEA/UK, you also have the right to lodge a complaint with your local data protection authority. If you are a California resident, you have rights under the CCPA/CPRA, including the right to know, delete, and opt out of "sale" or "sharing" of personal information (we do not sell or share personal information as defined by the CCPA).
Our subprocessors may process data in the United States and other countries. Where required, we rely on appropriate safeguards (such as Standard Contractual Clauses) for transfers of personal data originating in the EEA, UK, or Switzerland.
We rely on encryption in transit (TLS), authentication via Clerk, and a minimal-retention architecture (your financial data is not stored server-side) to reduce risk. See our Data Flow & Security Overview for a plain-language walkthrough. No method of transmission or storage is 100% secure, and we cannot guarantee absolute security.
The Service is not directed to individuals under 18, and we do not knowingly collect personal data from children.
We may update this Privacy Policy from time to time. Material changes will be notified via the Service or by email. Continued use of the Service after changes take effect constitutes acceptance.
LangevinAI
contact@langevinai.io