Private AI That Actually Belongs to You
A simple monthly subscription, full control, no data mining.
Chat, write, code, research — powered entirely by transparent open-weight models.
Website · Web App · Docs · Downloads
We use only open-weight models — no black boxes and no silent data collection. You know exactly what runs your AI.
- Clear monthly pricing — One fee covers platform access and AI credits. No hidden costs.
- Open-weight only — DeepSeek, Llama, Mistral, Qwen, and more via OpenRouter. No closed-source models. Aggregate usage is publicly visible on the OpenRouter app page — token totals and models, zero personal data.
- Privacy first — Encrypted chats, no tracking, no profiling. Built like a tool, not a marketing funnel.
- Your data, your control — We store nothing you don't want. Fully deletable. Fully controllable. Fully yours.
- End-to-End Encryption — Server-synced chat data is encrypted client-side with AES-256-GCM before upload
- Cross-Platform — Android, iOS, Linux, macOS, Windows, and Web
- Real-Time Streaming — Watch AI responses as they're generated, with streaming preserved across chat switches
- File Attachments — Share images, PDFs, and documents with AI
- Offline Support — Access your chat history without a connection, with automatic network recovery and plaintext local cache for instant loading
- Tool Calling — Built-in tool system with registry, executor, and per-tool settings. AI can call tools and display results inline
- AI Image Generation — Generate and edit images directly in chat
- Interactive Maps — AI responses with
<map>blocks render inline maps with markers, places, and route polylines - Interactive Charts — AI responses with
<chart>blocks render inline charts (bar, line, pie, scatter, radar) - Weather Cards — AI responses with
<weather>blocks render rich weather cards with hourly forecast - Email Drafts — AI responses with
<email>blocks render email cards with "Open in Mail App" button - Spotify Control — Play, pause, search, manage playlists and volume via OAuth-connected Spotify
- Calendar & Reminders — Create calendar events (native on Android/macOS, .ics on Linux/Windows) and set alarms/timers with notifications
- Web Search & News — Brave-powered web and news search with freshness controls
- Weather, Places, Calculator, QR Codes, Notes — Expanding set of built-in tool handlers
- Multi-Pass Tool Call Rendering — Interleaved content blocks show text and tool calls in correct chronological order with collapsible UI
- Multi-Step Account Deletion — GDPR-compliant three-step deletion flow with password confirmation
- In-App Update Checks — Automatic version checking against GitHub Releases with platform-specific download links (APK, DEB, AppImage, DMG, EXE)
- Theme Customization — Colors, backgrounds, dark/light mode, visual effects
- Redesigned Reasoning UI — Expandable accent-tinted cards for model reasoning and tool call details
- Mobile Three-Pill Input — Redesigned mobile input bar with separate attachment, text, and action pills
- Audio Visualizer — Gradient glow waveform with exponential scaling for voice recording
- Unified Image Preview — Consistent image viewer across desktop and mobile with copy-to-clipboard support
- Debug Chat Copy — Copy full chat contents (including reasoning, tool calls, model info) to clipboard for debugging
- Client-side encryption — Chats synced to the server are encrypted on your device before upload
- Zero-knowledge architecture — We cannot read your chats, even if the server is compromised
- Plaintext local cache — Previously loaded chats are also cached locally in plaintext for instant loading and offline access; this cache is protected by your device account and OS sandbox, not by the chat encryption layer
- Certificate pinning — Protection against MITM attacks, including WebSocket connections
- Image validation — Magic-byte verification on uploaded images
- No logging in production — All debug logs are disabled in release builds
If you lose your password, all your chats are permanently lost. There is no recovery mechanism by design — this ensures maximum privacy. Choose a strong password and store it safely.
| Data | Storage |
|---|---|
| Chat messages | Encrypted before sync/storage on the server (AES-256-GCM). Previously loaded chats are also cached locally in plaintext for instant loading and offline access |
| Chat titles & metadata | Encrypted on the server. When cached locally for faster loading, they are stored in plaintext |
| Starred chat status | Encrypted on the server. When cached locally, it is stored in plaintext |
| Your encryption key | Stored locally only and never synced to the server. Uses secure storage where available, with local app-storage fallback on some desktop builds |
For detailed security information, see SECURITY.md.
€20/month — all models, all platforms. Includes €16 in monthly AI credits; €4 covers infrastructure and platform access.
See chuk.chat/en/pricing for details.
- Flutter SDK 3.24+ (includes Dart 3.9.2+)
- Supabase project (supabase.com)
Platform-specific: Android Studio (Android), Xcode (iOS/macOS), Visual Studio 2022 (Windows).
git clone https://github.com/chuk-development/chuk_chat.git
cd chuk_chat
cp .env.example .env
# Edit .env with your Supabase credentials
flutter pub get
./run.sh linux # or: android, android-x64, android-vm [avd_name], windows, macos, ios, web# Quick release build (loads credentials from .env)
flutter build apk --release \
--dart-define-from-file=.env \
--dart-define=PLATFORM_MOBILE=true
# Full release (all platforms)
./scripts/build-release.sh allFull developer and architecture documentation is available at docs.chuk.chat.
See also the docs/ folder for build instructions, architecture, database schema, and more.
- Fork the repo
- Create a feature branch
- Run
flutter analyzeanddart format . - Open a Pull Request
See CONTRIBUTING.md for details.
| Component | Technology |
|---|---|
| Framework | Flutter (Dart) |
| Backend | Supabase |
| Encryption | AES-256-GCM with PBKDF2 key derivation |
| AI Models | OpenRouter |
| Hosting | Dokploy + Cloudflare |
Business Source License 1.1 — free for non-production use. Converts to GPL v3 after 3 years per release.
- Website — Product page & pricing
- Web App — Use Chuk Chat in the browser
- Documentation — Full docs
- Privacy Policy
- Status
- Blog
- OpenRouter Usage Stats — Aggregate token usage and models used across all Chuk Chat users (no personal data)