Privacy policy
Mantle is a private household assistant that one family runs on its own computer. It isn't a public service, and it has no users outside that family. This page explains what it does with Google data for the family members who connect their accounts.
What Mantle does with Google data
- Calendar: reads and changes events on the family calendar and on a person's own calendar, and adds family members as guests.
- Tasks: reads and changes tasks.
- Gmail: searches and reads mail when asked, writes drafts, and labels mail in the family's shared mailbox. Google's permission for this also covers sending, but Mantle's software refuses to send. A person reviews each draft and sends it themselves.
- Drive: reads files when asked, and creates and manages its own files and folders.
Mantle uses this data only to do these things for the family. It doesn't sell it, use it for advertising, or use it to train AI models.
Where it's kept
What Mantle keeps is stored on the family's own computer, in a private database that isn't reachable from the public internet. Google sign-in tokens are encrypted there. Events, tasks and files it writes to Google stay in that family's Google accounts.
Who else receives it
To answer requests, Mantle sends the relevant data, which can include the text of email, events and files, to its AI providers:
- Anthropic, whose Claude models do most of the work.
- TypeSafe, when turned on, for short yes-or-no checks.
Neither provider trains its models on this data, under its API terms. Mantle shares it with no one else.
Who in the family can see it
Anything sent or forwarded to the family's Mantle address is shared with the whole family.
A parent can't read another parent's chat with Mantle, though parents can review a caregiver's. Parents can see Mantle's activity log, which records what it changed, such as the title of an event on someone's own calendar, and any proposal waiting for approval. Since November 2026 the log doesn't keep the text of mail or files Mantle reads for someone. The household's admin can also see the notices Mantle sends to other family members.
Disconnecting and deleting
Anyone can disconnect their Google account in the app, and Mantle stops using it. To remove Mantle's access on Google's side too, use your Google account permissions page. What Mantle already saved stays on the family's computer until the family deletes it.
Contact
Questions go to the support address shown on Google's sign-in screen for Mantle.