Privacy Policy
Effective Date: March 1, 2026 · Last Updated: March 1, 2026
Welcome to BriefStock ("we," "our," or "us"). We operate briefstock.ai, an AI-powered stock research platform. This Privacy Policy explains how we collect, use, store, and protect your personal information. By using BriefStock, you agree to the practices described here.
1. Information We Collect
Information you provide directly:
- Email address (when you create an account)
- Password (stored in hashed form — never in plain text)
- Payment information (processed by Stripe — we never store card details)
- Any feedback or support messages you send us
Information collected automatically:
- Ticker symbols you search or add to your watchlist
- Pages visited and features used within the app
- Browser type, operating system, and device type
- IP address and approximate geographic location (country/city level)
- Session duration and interaction patterns
Information from third parties:
If you sign in via Google or another OAuth provider, we receive your name and email address from that provider.
2. How We Use Your Information
We use your information to:
- Create and manage your BriefStock account
- Generate personalized stock research briefs
- Deliver your Monday Morning Brief digest (Pro users)
- Process payments and manage your subscription
- Improve our AI models, calculations, and data quality
- Send product updates and feature announcements (unsubscribe any time)
- Respond to support requests
- Detect and prevent fraud or abuse
We do not sell your personal data to third parties. We do not use your data for advertising purposes.
3. Third-Party Services We Use
To provide BriefStock, we work with the following third-party services:
| Service | Purpose |
|---|---|
| Anthropic | AI research generation via Claude API |
| Stripe | Payment processing |
| Vercel / Railway | Hosting and infrastructure |
| PostHog / Plausible | Product analytics (anonymised) |
| Financial data APIs | Stock price and fundamental data |
4. Data Retention
- Account data is retained for as long as your account is active
- Search history and briefs are retained to power your history and Monday digests
- If you delete your account, we delete your personal data within 30 days
- Anonymized, aggregated usage data may be retained indefinitely for product improvement
5. Your Rights
Depending on your location, you may have the right to:
- Access the personal data we hold about you
- Correct inaccurate data
- Delete your account and associated data
- Export your data in a portable format
- Opt out of marketing emails at any time
- Withdraw consent where processing is based on consent
GDPR (EU/EEA users): You have full rights under the General Data Protection Regulation. Our lawful basis for processing is contractual necessity and legitimate interest.
CCPA (California users): We do not sell personal information. You have the right to know, delete, and opt out of the sale of personal information.
To exercise any of these rights, email us at support@briefstock.ai.
6. Cookies
We use cookies to keep you logged in, remember your preferences, and understand how you use BriefStock. See our full Cookie Policy for details.
7. Security
We use industry-standard security practices including HTTPS encryption, hashed passwords, and access controls. No system is 100% secure. We will notify you promptly in the event of a data breach that affects your personal information.
8. Children's Privacy
BriefStock is intended for users who are 18 years of age or older. We do not knowingly collect personal information from anyone under 18. If we become aware that a minor has provided us with personal data, we will delete it immediately.
9. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of significant changes via email or a prominent notice on the site. Your continued use of BriefStock after changes are posted constitutes acceptance of the updated policy.