assistant-mail is a small private program that runs on one person's own computer. It is the sign-in part of a personal AI assistant that its owner, Cristian, built for himself and his family.
It is not a public product or a public service. Nobody else can sign up for it, and it has no users other than the people in the owner's household.
When a household member allows it, the program reads that person's own Gmail messages and notes, read-only, so that their personal assistant can answer questions such as "what did the school email me last week?". It never sends, deletes, moves or changes any message.
Everything is stored on the owner's own computer. See the privacy policy for the details.