You don't need a $4,000 machine.

Frontier AI on your most sensitive work.Your context stays on your Mac.

Argo replaces your names, numbers and client details with stand-ins, on your Mac.

The stand-ins go out. The map that turns them back stays on your machine.

$20 a month. Nothing to buy, nothing to maintain.

One month free from your first prompt, then $20 a month.

macOS 14 Sonoma or later, Intel and Apple silicon. No account, no API key.

The tab you closed

You went looking for private AI and found a price tag.

You did the research.

The RAM. The model sizes. The quantization threads. Which Mac would actually run the thing well.

Then you added it up.

$4,000.

For a setup you would still be maintaining yourself on a Sunday.

So you closed the tab.

And went back to the chat window you were already using.

There is still that one thing you won't paste into it.

That thing is what this is for.

Why it's $20 and not $4,000

The middle option.

The machine people price for this lands around $4,000.

And you maintain it yourself.

A free local model on the Mac you already own is genuinely good for most of the week.

It still trails on the hard part. The hard part is the work you were withholding.

Argo is the middle. A frontier model for $20 a month, with your names and numbers replaced on your Mac before the prompt is sent.

Keep whatever local setup you have. Your context lives in a file on your machine, not in an account you log into, including ours.

How it works

What actually happens when you hit send.

01

Your context lives on your Mac

Your notes and details sit in a local store inside Argo, on your machine, not in a cloud account you log into. There is no account to make and no key to paste. The store is a file on your Mac, and that is where it stays.

on-device
context store
02

Argo finds what points at a person

Before the prompt leaves, Argo scans it on your machine for the things that point at a person: names, company and client names, numbers, dates. Detection is a judgment call, and it misses in both directions. So Argo shows you every replacement it is about to make, before anything is sent. Read that list. You can change any line in it.

Fabio Conti
Müller AG
03

Stand-ins go out instead

Your name becomes an alias. Your client becomes a fictional company. The rewritten prompt goes to Claude Sonnet 5, through our servers, on our API key. That is why there is nothing for you to wire up, and it is also why the aliased text passes through us on the way. We keep no prompts and log no IP addresses at that hop.

Fabio Conti → Marco Rossi
Müller AG → Delta Hold.
04

Your real details come back in

The alias map stays on your Mac, and Argo uses it there to put your names and numbers back into the answer. The match is on exact text. If the model writes something back in a different shape, a date reformatted, a number rephrased, the swap can miss, and a stand-in reaches your screen looking like your own fact. Argo can show you what the cloud saw and what it wrote, next to the reply. It does not flag every miss, so check the details that matter. The map itself is never sent.

Marco Rossi → Fabio Conti
Questions

The part everyone asks first.

Do that. It is free, it runs offline, and for everyday work it is genuinely good now. Where it still trails is the hard 10 to 20 percent: long context, careful reasoning, the work you would actually want a frontier model for. Argo is for that slice, and for the work you currently do not send anywhere at all. Keep the local setup.

No. Argo runs on Intel and Apple silicon Macs, macOS 14 Sonoma or later, and does the detection on your machine, but the model itself runs in the cloud, so you are not buying memory to hold one. The $4,000 machine was for running a model at home. This is the other route to the same place.

Claude Sonnet 5, and that is the whole list today. Argo holds the API key and routes the request, so there is nothing for you to wire up, and it also means the aliased prompt passes through our servers on the way there. When another model is connected, we will say so here.

One month free, counted from your first prompt, then $20 a month. There is no signup form and no card to add. You download Argo, you start typing, and the free month starts with the first thing you send. The $20 covers your model access through Argo. There are no credits, no top-ups, no usage packs.

Typed text on the desktop, and that is the scope today. What is missing is missing for two different reasons. Some of it is simply unbuilt. Some of it fights the mechanism: a voice recording identifies you by definition, pictures carry names and faces in pixels that text replacement cannot reach, and a search query with the name taken out often returns nothing useful, because the name was the query. Mac, typed work.

Your prompt is stripped of identifying data on your Mac, before anything leaves. The aliased version passes through our servers on the way to the model. We keep no prompts and log no IP addresses.

It sees a version with stand-ins where your names and numbers were. Detection is not perfect, and context you write yourself can still point at a person even with the names swapped. That is why Argo shows you every replacement before it sends, and why you can change them.

The alias map is what turns the stand-ins back into your real details, and it stays on your Mac. We are not going to tell you we can see nothing. We route the request, so aliased text passes through us. What does not pass through us is the map.

Names, financial figures, health details, company and client names, addresses, account numbers, dates tied to an identifiable event. Anything that could connect a prompt back to a real person, yours or someone else's. Argo treats those categories at different levels of sensitivity, and you can add your own rules.

The alias map and your context are files on your Mac, so they are as reachable as anything else on that machine. The usual Mac protections are what do the work here: FileVault on, a real login password, remote wipe through Find My. We will describe what Argo itself does with those files at rest once we can show it, and not before.

Out now on Mac

Do your best work,privately.

One subscription, no $4,000 machine, and your context stays on your Mac.

One month free, then $20 a month.