Privacy Policy

We process your account email, profile, book projects and usage information to operate PublishEngine. Authentication and database services use Supabase. API keys and social tokens are encrypted server-side and are not shown in plaintext after storage. Requests you choose to generate with AI may be sent to the selected AI provider; do not submit sensitive personal information or material you do not have rights to use. Paddle processes checkout and billing information as Merchant of Record; PublishEngine does not store full card details. Essential authentication cookies keep you signed in, and local storage remembers your theme preference. We do not sell your manuscripts or personal data. Retention follows account/service needs and legal requirements, including billing record obligations. To request access, correction or deletion, contact privacy@publishengine.app. Provider-specific retention and international processing may apply; review Supabase and Paddle privacy terms before using their services.