Private AI built for confidential work
Your sensitive files and prompts always stay yours. Use any AI model you want without worrying who sees your data.
Choose from 1,000+ open models
What is private AI?
Private AI means running artificial intelligence models on your own device, so your prompts and files stay on your machine and never reach any company's servers.
No account
You never enter your email or any personal information, so there is no user record to build your profile from.
No external server
There is no cloud to send anything to. Your machine loads the model and writes the answer itself.
Offline capability
No network connection needed. The model runs from your disk after the first download.
Things you stop worrying about with Private AI
You keep the only copy
With cloud AI there is always a stored copy on a company's server. A local model keeps your prompts on your disk instead, and that is the only copy that exists.
Nothing is too sensitive to open
There are files you'd never paste into a cloud chatbot, like documents under NDA or a private code. Open the whole thing and ask, without cutting out the sensitive parts.
Your prompts never become training data
Cloud services keep the right to train on everything you send them. Run the model locally and none of your prompts show up in a future model's answers.
Private AI vs Cloud AI
Private AI keeps your data private by design.
- Your data stays on your device
- No account, no logins
- Works offline
- Free and open-source
- Your prompts are sent to server
- Require an account
- Requires Network Access
- Closed-source
Learn more in our blog
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Pick a model for your hardware, understand quantization, and set it up in a few clicks.
Best Local LLM Apps in 2026
The 10 best local LLM apps compared on interface, platform reach, openness and tool support.
How to Run DeepSeek Locally
Run DeepSeek R1 offline: which distilled sizes fit your hardware, and the step-by-step setup.
Get your private AI in three steps
Download & install
Free for Mac, Windows, Linux, iPhone and Android. No account, no email.
Pick a model
Pick from 1,000+ private models: Llama, Qwen, DeepSeek and more. Downloads once, then runs offline.
Chat privately
Open any file without thinking twice.
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Download Atomic Chat
FAQ
Everything about running a private AI on your own device
Private AI is a language model that processes your data without exposing it to anyone else. With Atomic Chat the model runs entirely on your own device, so your prompts and chats never touch a server. It is private because of how it works, not because of a policy.
Public AI like ChatGPT or Gemini sends your prompts to a company's cloud, where they can be stored or used for training. Private AI keeps processing under your control. Atomic Chat goes furthest by running fully on-device, so nothing leaves your machine.
Yes. Atomic Chat is a free, open-source private ChatGPT alternative that runs local models on your device. There is no account and no cloud, so nothing is sent anywhere in the first place.
The most private LLM is one that runs locally with no telemetry. Atomic Chat runs 1,000+ open models, including Llama, Qwen, DeepSeek and Gemma, entirely offline. It is open-source, so you can verify there is no data collection.
Yes. Atomic Chat is a PrivateGPT-style app that runs locally with no server, so every conversation stays on your own device and nothing is logged externally.
Completely. After you download a model once, Atomic Chat runs with the internet off. Because the model lives on your device, it sends 0 bytes to any server.
Any open model in Atomic Chat, including Qwen, Gemma, DeepSeek, Llama, Mistral and Phi. You get 1,000+ open models to run locally, downloaded once and used offline.
Yes. A local LLM runs on your own CPU or GPU, so every prompt and response is processed on your machine. Atomic Chat has no account and no telemetry, and it’s open-source under Apache-2.0 so you can audit exactly what it does.
Yes. Atomic Chat is 100% free and open-source under Apache-2.0, with no subscription, no message caps and no hidden costs. You own your private AI outright.
Yes. Atomic Chat is available on iOS and Android, so you can run models on-device and keep chatting even in airplane mode.
Built in the open
Follow the project, file issues, and chat with the people building Atomic Chat.
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