Welcome to TeeChat

We’re building TeeChat for people who want a capable AI assistant without giving up ownership of their conversations.

Web preview (available now)

The browser app at chat.teechat.ai is live today — hosted AI with locked digital envelopes for your messages, no server-side chat archive (threads stay in this browser and auto-delete after 7 days), and a verification check in Settings so you can confirm which secure server will handle your prompt. The feature set is still expanding; sign up to follow along.

Desktop (macOS Apple Silicon) and mobile (upcoming)

The macOS Apple Silicon desktop app is available now — folders on your machine that you control, Deck Studio, optional local models, and the full experience. Download from www.teechat.ai/download. Windows, Linux, and Intel Mac builds are rolling out next. Mobile apps for iOS and Android are still in development. Your web account carries over when you install desktop or when mobile ships.

Data sovereignty on teechat.ai

Data sovereignty means your conversations stay in folders you control — your folder, you rule. See the homepage FAQ. We do not keep a copy of your chat threads on our servers. On the web preview, conversations stay in this browser and auto-delete after 7 days (not synced across devices). When you use chat.teechat.ai or our hosted API for AI replies, your message leaves the device already scrambled — our routing server forwards that scrambled text and should not see what you actually typed. Something must unscramble it to run the model: only our open-source inference engine, inside a secure hardware zone, does.

Open Settings in the web client and verify the engine before you send — so you know which measured environment will see your prompt for that reply.

Open source you can audit

The TeeChat application is proprietary. We publish the encryption stack as open source so experts can verify the hosted path — not just trust marketing:

• OPE (Open Privacy Envelope) — how we lock and sign messages
• Inference engine — verification, key rotation, and server-side AI handling

Verified AI replies (when you need proof)

Our production path uses verified inference engines: your app locks the message with OPE; the routing server forwards sealed envelopes; only the engine inside a locked-down secure server unscrambles it for the model. This is evidence you can check, layered on top of data sovereignty.

We’ll share measurement and policy details as production verification goes live.

Follow along

• Product updates on this blog
• Open protocol code: OPE and Inference engine

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