Tacit

The extension that knows nothing about you.

Tacit is a clean, privacy-first AI sidebar that lets you chat with the world's best models without handing over your data or paying subscription fees.

🛑 The Problem with other AI extensions: Most AI tools track your history, sell your data, and charge you $20/month just to access models you could get cheaper elsewhere.

✅ The Tacit Solution: We have no database. We have no servers. We literally cannot see your conversations. Everything is stored locally on your device, encrypted.

✨ KEY FEATURES

🧠 Bring Your Own Intelligence

Cloud Power: Connect directly to OpenRouter (600+ models), OpenAI (ChatGPT), Anthropic (Claude 4.5 Opus/Sonnet), Google Gemini (Gemini 3 Pro/Flash/Nano Banana).

Go Local: Run completely offline using Ollama or LM Studio. Zero API costs.

No Middleman: You pay the wholesale API rates directly to the providers (or pay nothing with local models). No monthly "Pro" subscriptions.

⚡ Workflow Optimized

One Hotkey: Press Alt+J (or Option+J) on any tab to slide the sidebar in.

Context Aware: Click "Read This Page" to summarize articles or analyze data instantly.

Vision Capable: Drag and drop images for analysis.

Smart Parsing: Drag PDFs for text extraction or code snippets for explanation.

🔒 Zero-Knowledge Privacy

Local-First: Your API keys and chat history are encrypted in your browser's local storage (AES-GCM).

Auditable: The code is open-source (AGPL License).

Clean UI: No injected buttons polluting your websites. Just a sidebar when you need it.

🛠️ HOW TO USE

Install Tacit.

Press Alt+J to open the sidebar.

Go to Settings and enter your API Key (OpenAI/Anthropic/OpenRouter) OR ensure your local Ollama server is running.

Start chatting!

Disclaimer: Tacit is a BYOK (Bring Your Own Key) application. You must provide your own API key or local model to generate responses.

Source code: https://github.com/flecomet/tacit-sidebar