Privacy policy

Mum (“we”, “us”) makes Mum, a private AI assistant you talk to in Signal. This policy explains what happens to your information when you use Mum and when you visit mum.ai.

Very little, and only what Mum needs to work.

• Your account number. A random number created when you sign up. We don’t ask for your name or email.
• Your plan and weekly usage. Mum keeps track of how much of your weekly allowance you’ve used, so it can apply your plan’s limit.
• Payment for paid plans. What’s needed to take payment for Plus and Pro.

• Your messages. Nothing you say to Mum is stored on our servers.
• Who, when and where from. Mum doesn’t keep records of who you talk to, when you talk, or where you’re talking from.
• Logs. The sealed computers that run Mum have no logs to read.
• Training data. Your conversations are never used to train AI models.

Your messages are end-to-end encrypted from your phone to Mum. Mum’s Signal account lives in its own sealed computer, and its key is created inside and never leaves. That means Signal’s encryption ends inside hardware we can’t read, not on our servers.

To answer you, Mum uses an AI model that runs on verified private hardware, so the company hosting the model can’t read your conversation either.

Each person’s Mum runs in its own confidential computer, with memory encrypted by the processor itself, using technology from AMD. We operate these computers, but nobody can log in, open a shell or read their logs. There are none.

The chip proves exactly which code is running, and your keys are released only to that exact public build. Every new version is added to a public log and waits 7 days before it can touch anyone’s keys, so any change is visible before it happens.

If you choose to save logins or payment cards, they’re kept in an encrypted vault that only your Mum can read. Mum uses them only for tasks you ask for, and it asks for your approval in the chat before every payment. If you decline, nothing is charged.

When Mum researches, books or shops for you, its visits to websites are anonymized. Mum’s browser also uses a standard 1920×1080 window, the most common screen size, so it blends in with ordinary visitors.

Some tasks need details shared with a website, like the name on a booking or the card for a payment you approve. Those websites receive only what the task needs, and their own privacy policies apply.

If you add Mum to a group, everyone in the group can see what Mum says there. People outside the group can’t, and neither can we.

When your Mum works with someone else’s Mum, for example to find a time for dinner, it only shares what’s needed for the request you made.

We can only hand over what we have. We don’t store your messages, chat history, logs or metadata, and the sealed computers can’t be opened, so we have none of that to give.

You don’t have to take our word for any of this. Ask Mum for proof and it replies with a file signed by the chip, naming the public code that holds your chat’s keys. Anyone can check that file with the open verifier. Signal’s safety number for Mum also changes if Mum’s key ever changes. See how Mum works.

Your account number is the only key to your account. If you lose it, the account can’t be recovered, because we don’t know whose it is. You can stop using Mum at any time.

mum.ai doesn’t use cookies, analytics or trackers.

If this policy changes, we’ll post the new version here with a new date. Changes to Mum’s code appear in the public log 7 days before they can touch anyone’s keys.

Questions about privacy are welcome. We’ll answer them without asking who you are.