01 / write
“Help me write the resignation letter I keep putting off.”
The drafts stay between you and Ab.
Private by physics
Nothing to read, because nothing was sent.
There is no server on the other end of your conversation. The only thing that can ever leave your computer is an encrypted copy of your history — and only you hold the key.
01
You type
It stays in your browser.
02
Ab thinks
On your chip, not in a data center. Nothing leaves.
03
You keep the record
Encrypted before it ever syncs, with a key only you hold. We can't read it. Nobody can.
Prompts sent to any server: 0Model: open-weight, Apache 2.0Who can read your history: you
Honest about the tradeoff
Smaller on purpose.
The biggest models live in data centers — that's what makes them big. Ab lives on your machine. It won't beat them at a trivia contest. It also can't leak, can't be subpoenaed, and can't learn from you, because there's nothing on the other end. For some conversations, that's the only thing that matters.
Runs in Chrome, Edge, or Safari 18+ on desktop
Room to be honest
The questions you'd rather not ask anywhere else.
Drafts, hard conversations, health, money, half-formed thoughts. Ab can help because the conversation never becomes anyone else's data.
02 / learn
“Explain this to me without making me feel behind.”
Ask freely, at your own pace.
03 / code
“Can you find the mistake in this function?”
Your code is processed on your hardware.
04 / life stuff
“Help me think through the conversation I need to have.”
Some thoughts deserve a room with a door.
Say it here. It stays here.
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