Legal

Privacy Policy

Last updated 18 July 2026

Proversial (“Proversial”, “we”, “us”) provides a service that tracks how brands appear in the answers given by large language models (LLMs) such as ChatGPT, Gemini, and others. This policy explains what personal data we collect, why, and the choices you have. We are the data controller for the personal data described here. Questions: contact@proversial.com.

We host and process data in the European Union (Google Cloud, region europe-west1). Our marketing site uses no cookies and no cross-site tracking.

1. Data we collect

Account & profile

When you sign up, we collect your email address, company name, and the authentication method you use (email/password, Google, or GitHub, via Firebase Authentication).

Billing

Payments are processed by Stripe. We do not store your card number. We keep your subscription tier, status, and Stripe customer/subscription identifiers so we can manage your plan.

Service content

The brands, topics, and prompts you configure for tracking, and the results we generate for you. These prompts are your market questions — not personal data — but we treat them as confidential to your account.

Usage analytics

We use PostHog (EU region) to understand product usage. On our marketing site this is cookieless and aggregate only (visit counts, no persistent identifier, no cookie banner needed). In the signed-in app, we record product events (e.g. viewing the dashboard, adding a topic, sign-in/sign-up) tied to your account, using cookies necessary for that purpose.

Technical

Server logs, IP address, and basic device/browser information, used for security and reliability.

2. Why we use it & legal bases

To provide the service — run daily evaluations, show your dashboard, expose the API (performance of a contract).
Billing — manage your subscription and payments (performance of a contract; legal obligation for invoicing).
Security & reliability — protect accounts and prevent abuse (legitimate interests).
Product analytics & improvement — understand and improve the product (legitimate interests; aggregate and minimised where possible).
Support and communication about your account (performance of a contract).

3. Who we share it with (subprocessors)

We do not sell your personal data. We share it only with providers that help us run the service:

Google Cloud / Firebase — hosting, authentication, and database (EU region).
Stripe — payment processing and billing.
PostHog (EU) — product analytics.
AI model providers (e.g. OpenAI, Google, Anthropic) — receive the tracking prompts you configure so we can evaluate your brand’s visibility. We do not send them your account or billing data.

4. International transfers

Your account and service data are stored in the EU. Some subprocessors (for example Stripe and certain AI providers) may process data outside the EU; where they do, transfers are covered by appropriate safeguards such as Standard Contractual Clauses and their data processing agreements.

5. Retention

We keep your data for as long as your account is active and as needed to provide the service. Billing records are retained as required by law. When you close your account, we delete or anonymise your personal data within a reasonable period, except where we must retain it for legal or accounting reasons.

6. Your rights

If you are in the EU/EEA (or a comparable regime), you have the right to access, correct, delete, restrict, or port your personal data, to object to certain processing, and to withdraw consent where processing is based on it. You may also lodge a complaint with your local supervisory authority. To exercise any of these, email contact@proversial.com.

7. Security

We use encryption in transit, access controls, and store credentials and API keys in hashed form. No system is perfectly secure, but we work to protect your data and will notify you of a breach where required by law.

8. Children

Proversial is a business tool and is not directed to individuals under 16. We do not knowingly collect data from children.

9. Changes

We may update this policy; we will revise the “last updated” date above and, for material changes, notify you.

10. Contact

Proversial, a business established in France — contact@proversial.com.