Noctisai
Secure AI Chat with Screen-Sharing Protection
A Windows-native desktop application for private, secure AI conversations with zero-knowledge encryption and protection from screen sharing tools.
Powerful Features
Everything you need for secure, private AI conversations
Zero-Knowledge Encryption
All chat logs and API keys encrypted with AES-256-GCM. Even we can't access your data.
Screen Sharing Protection
Prevents content capture in video calls. Your conversations stay private even when sharing your screen.
Multi-LLM Support
Works with OpenAI GPT-3.5/4, Ollama local models, and any OpenAI-compatible API endpoint.
Secure Authentication
Master password protection with PBKDF2 key derivation. Your data is locked behind strong encryption.
Privacy First
No telemetry, no cloud storage. All data stays local on your computer. Complete privacy guaranteed.
System Tray Integration
Hide or show the app instantly with CTRL+SHIFT+H hotkey. Quick access from your system tray.
Dark Mode UI
Beautiful, modern dark interface designed for comfortable extended use and reduced eye strain.
How It Works
Get started in minutes with these simple steps
Download and Install
Download the Windows installer from this page and run the setup file. The installation takes just a minute.
Create Master Password
Launch the app and create a master password (minimum 12 characters). This password encrypts all your data.
Configure AI Provider
Add your OpenAI API key, or set up Ollama for local AI models. You can also use any OpenAI-compatible endpoint.
Start Chatting
Begin your secure conversations! All your chats are automatically encrypted and stored locally on your computer.
Quick Hide/Show
Use CTRL+SHIFT+H to instantly hide or show the app. Perfect for quick privacy when needed.
Download Noctisai
Get the Windows desktop application and start having secure, private AI conversations today.
System Requirements
- Operating System: Windows 10 or Windows 11
- Architecture: x64 (64-bit)
- Disk Space: 100MB+ free space
Important: This is a Windows desktop application, not a web app. After downloading, install it on your Windows computer and run it from your desktop or Start menu. All your data is stored locally on your computer and never sent to any server except your configured AI provider.
Privacy & Security First
Your privacy is not an afterthought—it's our foundation
Zero-Knowledge Encryption
All your chat logs and API keys are encrypted with AES-256-GCM. We use zero-knowledge architecture, meaning even we cannot access your data.
No Telemetry
We don't track you. No analytics, no usage data collection, no telemetry. Your privacy is respected from day one.
Local-Only Storage
All your data stays on your computer. Nothing is stored in the cloud. You have complete control over your information.
Screen Sharing Protection
Advanced protection prevents screen capture tools from recording your conversations. Stay private even during video calls.
Trust is earned, not assumed. We've built Noctisai with privacy and security as core principles, not features added later. Your conversations are yours alone.