We of course have a privacy policy (https://zulip.com/policies/privacy) and some security pages that touch on privacy (https://zulip.com/security/; https://zulip.readthedocs.io/en/latest/production/security-m...) but we put a lot of care into privacy issues both in product design and in what vendors we use, and adding a dedicated page about privacy is near the top of our TODO list for the website.

If anyone wants to help, I'd love links to privacy pages that folks really like and/or lists of questions that readers would like to see such a page clearly answer.