Sign-in stores your name, email address, and avatar in the site database so your library and bookmarks follow you across visits. A session cookie keeps you signed in; it carries no advertising identifiers.

Contact messages stay in the site database and are read only to answer you. Newsletter signup stores your email address and subscription status, and every digest carries a one-click manage link.

Purchases made through Gumroad report the buyer email and product so the item can appear in your library. Nothing else is shared with anyone, and there is no advertising or analytics resale of personal data.

To ask what is stored about you, or to have it removed, write through the contact page and it will be handled directly.