MumMum’s
the word.
A private AI assistant that lives in your Signal chats. It plans the trip, books the table, sorts the receipts and finds it cheaper. And it tells no one. Not even us.
You’ve told your AI things you wouldn’t tell your mum.
Most AI assistants keep what you type. Conversations can be saved, read by reviewers and used to train future models, all tied back to you.
We keep none of it.
Your chats stay sealed inside your own Mum, where only your Mum can read them. We have none of it to sell, leak or hand over.
Lost in the crowd, on purpose.
Mum can research, compare, book and buy for you. Every visit Mum makes is anonymized, unless you’ve asked it to sign in for you, and its browser uses a standard 1920×1080 window, the most common screen size in the world. To a website, it looks like one more ordinary visitor. Browsing with Mum is private, and the AI that steers its browser isn’t told who you are.
Quick to pay. Never without you.
Keep your logins and cards in Mum’s encrypted vault and checkout takes seconds. But Mum can’t spend a cent until you say so.
Built so even we can’t look.
Plenty of companies promise not to read your chats. Mum is built so we couldn’t, even if someone asked us to.
Your Mum runs on its own sealed computer, its memory scrambled by the chip itself. Nobody can log in or look inside, including us. There are no logs to read.
The chip proves exactly which software is running. Your key is held in a hardware security module, which releases it only to a sealed computer running a version recorded in the public log.
Every new version’s fingerprint is recorded in a public log before it can go near anyone’s keys. A version that isn’t in the log can’t get your key.
Messages stay encrypted all the way from your phone into Mum’s sealed Signal line, then cross our relay locked so only your Mum can open them. Mum’s Signal key is made inside sealed hardware and never leaves it.
Mum’s replies, reading files and pictures, sorting your email and overnight dreams all run inside a secure enclave on the graphics chip, and your Mum checks the enclave’s hardware proof first, so nobody outside the enclave can read your conversations, including us.
Don’t take our word for it.
At every handover, hardware checks hardware. Mum’s Signal line and your Mum check each other’s proof, your key goes only to a version in the public log, and your Mum checks the AI hardware’s proof before it sends anything. One check is yours: Signal warns you if Mum’s key ever changes.
Read the technical details →No name. No email. Just Signal.
Mum never asks who you are. Your Mum is tied to your Signal account, and the link between them stays inside Mum’s sealed Signal line. Our other systems see only a random ID and a stand-in, never your name, email or Signal number.
Privacy isn’t a paid extra.
Every plan gets the same sealed, private Mum. The only difference is how much Mum can do for you each week.
Questions, answered.
Yes. Mum lives in Signal, the free private messaging app for iPhone, Android and desktop. If you already have Signal, you’re one invite away.
No. Mum only sees the chats it’s part of: your own chat with Mum, and any group you add it to.
A token is a small piece of text, roughly three-quarters of a word. Mum counts tokens for everything it reads and writes for you, including the web pages it reads while working on a task. Your allowance resets every week.
Write to us at hi@mum.ai. Your Mum is tied to your Signal account, and anyone who can send messages from it can use your Mum, so keep your phone and Signal locked.
Only when you say so. Mum asks for your approval in the chat before every payment, and if you decline, nothing is charged.
Mum remembers what you tell it, for you, sealed inside your own Mum. Nothing you say is used to train any AI model.
Hardware checks hardware at every handover, and your key goes only to a version recorded in a public log. Signal also warns you if Mum’s key ever changes. See how Mum works.
Go on.
Tell Mum.
Private AI that lives in Signal. Invite-only, for now.