A complete AI assistant for your Mac

Your own AI. On your Mac. $100, once.

A complete AI assistant that lives on your Mac — voice, memory, study tools, and an encrypted vault, working from the moment you install it. The big AI subscriptions run $240 a year, every year, forever. Aletha is $100, once. And it's yours.

Get Aletha Codex — $100, one time

Download for Mac · 14-day guarantee

On Windows? Join the waitlist →

Why on-device matters

Every cloud chat is a record you don't control.

It's stored

What you type into a cloud AI lands on company servers, where it can be retained, reviewed, and used to train future models.

It can be demanded

In 2025, a federal court ordered a major AI company to preserve users' conversations as evidence — including chats people thought they'd deleted.

It can leak

A server holding millions of conversations is a target. A conversation that never leaves your Mac can't be pulled from a data center.

Aletha can't share your conversations. Not won't — can't. There is no server to share them from.

Ask anything, anywhere

One hotkey opens Aletha over whatever you're working on. Speak or type, get the answer on the spot.

Memory that lasts

Aletha keeps the context of your work between conversations, stored on your Mac and nowhere else.

Study tools

Turns lecture notes into study guides, flashcards, and practice questions. Works offline.

System health

Shows exactly what's taking up your disk, and clears it before the "storage full" warning.

Encrypted vault

A locked place for passwords and private notes. AES-256, with a key that exists only on your Mac.

The difference

Renting an AI vs. owning one.

A typical AI subscription

$20 a month, every month, for as long as you use it
Your words are processed on someone else's servers
Needs an account, a login, and a connection
Stops working when the internet does
The terms can change underneath you

Aletha Codex

$100 once — nothing ever again
Your conversations never leave your Mac
No account. No login. No connection required.
Works with the Wi-Fi off
Updates included at no extra charge
Yours, the way software used to be

At $20 a month, a subscription passes $100 by month five — and keeps going. Aletha stops at $100.

How buying works

From payment to first conversation in about ten minutes.

1
Check out with Stripe

Payment runs on Stripe's secure checkout. Your card details never touch our servers.
2
Your key appears instantly

The moment payment completes, your license key and download are on screen. Nothing to wait for.
3
Install like any Mac app

Open the download, drag Aletha to Applications, enter your key. Everything is already set up.
4
Press the key and ask

Voice, memory, vault, and study tools work from the first launch — backed by a 14-day guarantee.

Want every detail before you decide? See exactly what happens after you buy →

Pay once. It's yours for good.

Voice, memory, study tools, and a vault — ready the moment you open it. $100 once: what a typical AI subscription costs in five months.

Yours in under a minute. No account. No sign-up.

Get Aletha Codex — $100, one time

Download for Mac · 14-day guarantee

"I built Aletha because I didn't trust the cloud with my own thoughts — and I didn't want to rent the tool that holds them. So I made one that lives on my machine and answers to me. Now it can live on yours." — Roland, founder