We published our experimental browser extension for Chrome just a few hours before OpenAI announced its Atlas browser. Ours takes a different approach: privacy first.

Atlas makes “memory” and cross-tab context a core feature. OpenAI acknowledges the privacy concerns and promises users full control over what gets stored and sent to the cloud. In practice, most users won’t maintain that control.

Our vision is full privacy by design, so it doesn’t matter what data flows to the cloud. The extension connects to (1) a cloud-hosted inference service (Privatemode AI) running gpt-oss-120b in carefully architected confidential-computing environments and (2) a local document store with a vector DB.

The inference service leverages AMD SEV-SNP and the confidential-computing features of the Nvidia H100. The environment is designed so that we (Edgeless Systems) and no one else can access user. All data stays encrypted even during processing in main memory. The client automatically verifies the integrity of the backend using a process called "remote attestation". All relevant server-side software can be found on GitHub and can be built reproducibly.

It’s an early developer version. If you want to play with it, you’ll need to clone the repo and run it together with our encryption/verification proxy and the aforementioned document store. You'll also need to sign-up for a free API key at www.privatemode.ai.

Looking forward to your feedback!

Repo: https://github.com/edgelesssys/privatemode-for-chrome-demo Blog post: https://www.privatemode.ai/articles/browser-extension-demo-l... Demo video: https://youtu.be/4j77YHXDqAQ