Privacy Policy

Last updated: April 2026

What Rulebase collects

Rulebase collects the minimum data needed to operate the service:

• IP address — used to track free AI check usage and purchased check balances. Not linked to any personal identity.
• Sentences you submit for AI checking — sent to the AI provider (OpenAI or Anthropic) to generate a response. Not stored by Rulebase after the response is returned.
• Payment information — processed entirely by Stripe. Rulebase does not see or store card numbers.

What Rulebase does not collect

• No user accounts or personal profiles
• No names, email addresses, or phone numbers
• No cookies for tracking or advertising

Analytics

Rulebase uses Google Analytics to understand how many people use the site and which pages are visited. This may set cookies in your browser. Google's privacy policy applies to that data: Google Privacy Policy.

AI providers

When you use the AI punctuation checker, your text is sent to OpenAI or Anthropic (depending on configuration) to generate a response. Their privacy policies apply to that processing:

• OpenAI Privacy Policy
• Anthropic Privacy Policy

Data storage

Check balances are stored on Cloudflare Workers KV, keyed by IP address. No other data is persisted. If you bring your own API key, it is stored in your browser's local storage and sent to Rulebase only when needed for the API proxy; Rulebase does not store it server-side.

Changes

This policy may be updated occasionally. Continued use of Rulebase constitutes acceptance of any changes.