Your Private On-device AI Assistant that gets stuff done.
One private assistant for everything you do. Control your computer by with new modalities, Create with AI that writes in context, and Automate entire workflows — all without sending your data to the cloud.
- Control
- Create
- Automate
- Extend
AND HERE’S THE PART NO CLOUD AI CAN CLAIM
All of it runs right here.
Not in a data center. Not on someone else’s servers. On the device in front of you. Keep scrolling — we’ll take you all the way down to the silicon.
Cephable runs entirely on your device. It starts as the app on your laptop, goes past the display into the motherboard, and all the way down to the silicon chip doing the work. The AI model runs on your own hardware — private by design. Nothing ever leaves your machine. No cloud. No data collection. Works offline.
It all runs right here.
Every command, every word, every workflow — processed entirely on your device. Private by design. Nothing ever leaves your machine.
Built for all computers.
Optimized for the AI PC era.
Validated by the makers.
Cephable runs on machines with a variety of compute levels and activates value on your device: turning hardware capability into a concrete local AI experience.
SCROLL TO SEE WHAT TO EXPECT
Tell us about your machine and see exactly what to expect — which model you'll run and which plan fits, entirely on device.
On-device · nothing leaves your machineYour machine
Rough is fineA light sounding board
Handles brainstorming and short reasoning on device. Deeper work routes up to a larger model, and you'll always see when it does.
What you can do
An estimate based on what you told us. Once installed, Cephable reads your actual hardware and tunes itself, so your real experience may land a notch higher or lower.
HOW IT WORKS
On-device from the first word
No accounts to wire up, no prompts shipped to a server. Cephable installs a private AI model that lives on your machine and gets to work.
01
Install and it's yours
Download Cephable and a private AI model runs locally. No subscription required to start, no cloud round-trips.
02
Use with any app
Cephable operates as your assistant in any app you have installed. Anywhere your cursor goes is available to Cephable.
03
Control, create, automate
Use Cephable in the ways that mean the most to you. Controlling multi-modally, creating content or automating workflows
DO MORE THE WAY YOU WANT
One assistant. Endless reach.
No accounts to wire up, no prompts shipped to a server. Cephable installs a private AI model that lives on your machine and gets to work.
Voice control
Drive your entire computer hands-free. Open apps, click, switch windows, and trigger any action with your voice.
Dictation anywhere
Speak and your words flow into any text field — email, docs, chat, code. Punctuation and formatting handled for you.
Custom commands & macros
Map a phrase to anything — keystrokes, app actions, shortcuts, multi-step macros. Build the controls you wish existed.
Generate text
Describe what you need and Cephable writes it where you're working — emails, docs, replies, summaries, and more.
Rewrite & translate in place
Highlight anything, tell Cephable how to change it, and it rewrites, shortens, or translates — right inside your app.
Agentic workflows
Describe a multi-step job in one sentence. Cephable navigates your apps, drafts, updates records, and reports back.
Works across every app
Cephable isn't locked to one program. It works system-wide — your browser, your editor, your inbox, all of it.
Universal by design
Voice, head tracking, facial expressions, switches and more — more than one way to drive your computer, built in from the start.
On-device & private
Every model runs locally. No cloud calls, no data collection, works offline. Your words and work stay on your machine.
Frequently asked questions
Questions about Cephable
About Cephable
Cephable is a private AI assistant for Windows and Mac that runs on your own computer. It controls your apps by voice or command, and it writes and rewrites text in any app. It also completes multi-step tasks, like researching a topic, building a Word document, and drafting the follow-up email. All of the AI processing happens on your device, not in the cloud.
On-device AI runs the model on your own computer instead of in a vendor's data center. Cloud assistants like ChatGPT and Copilot send your prompt and its context to remote servers and charge by usage. Cephable runs a fine-tuned small language model locally. Your work stays on your machine, keeps running offline, and never adds per-token fees.
For most daily work, yes. Cephable handles drafting, summarizing, file work, web research, and multi-step tasks across every app on your computer, not just one vendor's ecosystem. Frontier cloud models are still faster and stronger at heavy reasoning and image generation. Many teams make Cephable their default and keep a cloud model for the exceptions.
Privacy and cost
Yes. Once you sign in and your model downloads, Cephable's voice controls, writing tools, and automations all run without an internet connection. Steps that need the web by nature, like online research or sending an email, need a connection for that step only. Cephable never needs a cloud AI model to do its work.
No. Cephable processes your prompts, files, and results on your device. Your task history is encrypted to your Cephable account and your computer's user profile, and it isn't stored on Cephable's servers. Your data never reaches a cloud model, and Cephable never uses your data or product telemetry to train models. Cephable is private by architecture, not by contract.
Cephable has three plans. Basic is free and includes Control. Plus adds Create, and Pro adds Automate. No plan charges token or usage fees, and teams get volume per-seat pricing.
Getting started
No AI PC is required. Cephable runs on Windows and Mac computers with Intel, AMD, Qualcomm Snapdragon, or Apple silicon processors. Control and Create run on 8 GB of RAM, and Automate needs at least 16 GB. You don't need a dedicated graphics card. Newer hardware simply runs tasks faster.
Download Cephable from cephable.com or the Microsoft Store and sign in. During setup you choose the kinds of work you do, and Cephable suggests prompts that fit that work. It also detects your hardware and installs the model optimized for it. The Explore tab has step-by-step guides and videos for common tasks.