KeePassium does not collect any personal data.
When you contact us via email we will store all the information in your message, including your email address. This information will be used only for providing you with a reply. We will not pass your information to any third parties, unless required by law. Our email is hosted by the Namecheap Private Email service (their terms of service).
In the future, this policy is likely to become more detailed — so that it would be precise enough for lawyers. You are therefore advised to check this page once in a while.