This page explains what sieve collects when you create an account, why we collect it, and what happens to it when you delete your account.
The lookup happens on sieve's own servers against a local copy of a public geolocation database — your IP address is not sent to any third-party lookup service.
Signup details are stored with your account record and used only for the purposes above — we don't sell them or use them for advertising. When you delete your account, your login is removed and your name, email, IP address, and location are deleted from the account record.
For anything this page doesn't answer — including data access or deletion requests — get in touch.