Now for Windows — Mac & Linux soon

AI that lives on your computer,
not in someone else's cloud.

DeeZen is a desktop agent that answers, creates, and acts on the machine you already own. It handles the everyday itself — free, private, instant — and reaches for the cloud only when a task genuinely calls for it.

Free everyday tier, forever. No account needed to start.

What it does

Not a chatbot that talks. An agent that does.

DeeZen works where your work already is — on your computer. Ask it, speak to it, or hand it a task, and it gets on with it.

Answers the everyday

Rewrites, summaries, letters, CV help — the daily questions, handled by a small model on your own machine. Instant, private, and it never costs a cent.

Talks — and lets you interrupt

Full-duplex voice, on-device. Speak naturally, it replies, and you can cut in mid-sentence to redirect it — just like a real conversation.

Creates media

Images, video, and music from a prompt. Draft locally on your GPU, render final quality in the cloud — you see exactly what each one costs.

Acts on your machine

Computer-use, with a safety gate. DeeZen can observe the screen, move, click, and type to carry out a task — always inside limits you set.

Reaches across your home

Delegate heavy jobs to another machine on your network, or open DeeZen from your phone on the same Wi-Fi. Your computers, working together.

Connects to your tools

Email, calendar, and files through standard connectors. And for teams: per-seat accounts with monthly spend caps, so a shared machine stays accountable.

How it thinks

A cascade, not a blunt instrument.

Most AI sends every single question to the biggest, most expensive model. DeeZen thinks in tiers — it answers at the cheapest level that can do the task justice, and only climbs when it has to.

On-device

Reflex & local model — the everyday, free

Rewrites, summaries, letters, routine questions. Answered right here on your computer. Instant, private, $0 — forever.

only when needed ↓
Cloud

Frontier models — the genuinely hard, your key

Deep analysis, high-stakes answers, vision, media. When a task truly needs a bigger brain, DeeZen escalates using your own provider key — and keeps it lean.

You're in control

Set the budget. DeeZen sticks to it.

One dial, three settings. It's a cost ceiling, never a quality floor — DeeZen will always answer on the local tier if it can do the task justice, whatever the dial says.

  • Nothing leaves your machine on the free tier. Your questions stay yours.
  • Cloud spend is your own key, metered by your provider — visible to the cent, live, in the app.
  • No DeeZen-side fair-use allowance to enforce or top up. The product is the product.
Saver
Stay local whenever remotely possible. Cloud only when there's no honest alternative.
Balanced
The default. Escalate when a task genuinely benefits, without watching every cent.
Best
Bring the strongest model to bear on anything non-trivial. Still only when it helps.
Pricing

Nothing to hide.

The big subscriptions charge everyone $20+ a month whether they use it or not. DeeZen is built differently: the everyday is free on your computer, the product is $4, and the cloud is billed per-use by your own provider — so a typical month looks like this.

Everyday questions (rewrites, summaries, letters)$0.00
DeeZen product$4.00
Cloud AI, typical month (your own key)~$1.00
A typical month≈ $5
A frontier subscription doing the same month costs $20+. We show the receipt because we can.
Free — forever
$0 / forever
  • Everyday questions answered on your computer
  • Rewrites, summaries, letters, CV help
  • Private — nothing leaves your machine
  • No account, no card, no key needed
Download free
DeeZen
$4 / month
  • Everything in Free, plus the full agent
  • Voice, media creation, computer-use, mesh
  • Cloud AI when a task needs it — your own key
  • The efficiency engine that keeps cloud spend small
  • The live cost counter — every cent, on screen
Get DeeZen

Get DeeZen

Windows first. Mac and Linux follow as their signing clears. One self-contained installer — no Python, no setup, no account needed to start.

Windows 10 / 11, 64-bit. Signed by ZenCognitics. The download activates when the signed installer goes live.