Cookie Policy
Last updated: February 25, 2026
1. What Are Cookies
Cookies are small text files stored on your device by your web browser. They help websites remember information about your visit, like your login status and preferences. BillSlayer uses cookies minimally and only for essential functionality.
2. Cookies We Use
Essential Cookies (Required)
These cookies are necessary for the Service to function. They cannot be disabled.
| Cookie | Purpose | Duration |
|---|---|---|
sb-*-auth-token | Supabase authentication session - keeps you logged in | 7 days (refreshed on use) |
sb-*-auth-token-code-verifier | PKCE code verifier for secure magic link authentication | Session (cleared after login) |
Analytics Cookies
We do not use any third-party analytics cookies. We do not use Google Analytics, Facebook Pixel, or any other tracking service. We do not track you across websites.
Advertising Cookies
We do not use any advertising or marketing cookies. We do not serve ads and do not participate in ad networks.
3. Local Storage
In addition to cookies, BillSlayer uses your browser's localStorage for certain preferences and cached data. Unlike cookies, localStorage data is never sent to our servers automatically.
| Key | Purpose |
|---|---|
billslayer_user_state | Your selected U.S. state (for consent law determination) |
billslayer_consent_acknowledged | Whether you've completed the consent flow |
billslayer_disclosure_acknowledged | Whether you've acknowledged the AI disclosure requirement |
billslayer_negotiation_tone | Your preferred negotiation tone setting |
4. Third-Party Cookies
When you make a payment, Stripe may set its own cookies for fraud prevention and payment processing. These are governed by Stripe's Privacy Policy. We have no control over Stripe's cookies.
5. Managing Cookies
You can manage or delete cookies through your browser settings. Note that disabling essential cookies will prevent you from logging in to BillSlayer.
6. Changes to This Policy
We will update this page if our cookie usage changes. The “Last updated” date above reflects the most recent revision.
7. Contact
Questions about our cookie usage? Contact us at privacy@billslayer.app.