After months of building full-time, I just shipped Sentient OS: a free, open-source (AGPL) Mac app built on one idea. AI shouldn't wait for a prompt; if it truly knows your life, it should *proactively help you with your life*.

**TLDR:** an on-device LLM understands your entire life, then proactively offers to get your work done through computer use. Here's how!

* **Every night at 3 AM**, it quietly wakes your Mac (lid closed is fine) and a custom on-device LLM reads what's new in your life: files, screenshots, WhatsApp, iMessage, Apple Notes, email. All of it is read locally on your own chip (raw data never leaves your Mac) and distilled into a clean markdown knowledge base (an Obsidian-style folder that's yours to read and edit).
* **Proactive Intelligence: you wake up to work Sentient noticed, researched, and prepared on its own.** The reply you forgot, drafted from your rich personal context. The subscription renewing tomorrow, caught tonight. You read it, edit if you like... and nothing *ever* fires until you click.
* **Sidekick: click your Mac's notch and just say "finish this for me"**; the notch glows with status as computer use does the task in your own apps and your browser, even in the background while you keep working. And because it's grounded in your knowledge base, it knows what's happening in your life.

Bonus: your knowledge base can connect to your ChatGPT & Claude over MCP. Connect it, then ask your ChatGPT *"what do you know about me?"*. Be amazed :\]

# So... what's the catch?

Sentient is **free forever for consumers**, because your Mac does \~90% of the compute. The last \~10% taps a frontier model of your choice: your own ChatGPT subscription (Sentient sets it up), OpenRouter, or a local model through LM Studio (first-party support!).

We'll make money later with an enterprise version; the consumer app stays free and open source.

Privacy is enforced by architecture, not policy: raw data never leaves your Mac, there are no accounts anywhere, and the whole stack is AGPL so you can verify every claim in the code!

**Download:** [**https://sentient-os.ai**](https://sentient-os.ai)

or `brew install --cask sentient-os-labs/tap/sentient-os`

**Source (star the repo if you like! :D):** [https://github.com/Sentient-OS-Labs/sentient-os](https://github.com/Sentient-OS-Labs/sentient-os)  
  
Apple Silicon (M1 or newer), macOS 15+, 8 gigs of RAM is enough!

I'm Jesai, building Sentient in SF with my co-founder Aditya. Happy to answer everything, from the on-device inference stack to how we reverse engineered codex computer use to work with local models! :D

I built an on-device LLM that understands your entire life overnight, then proactively offers to get your work done through computer use :D Free & OSS. This is Sentient OS!