Kai

<img src="https://img.shields.io/badge/Platform-Web-f7df1c?logo=javascript" alt="Web"> <img src="https://img.shields.io/badge/Platform-Android-34a853.svg?logo=android" alt="Android" /> <img src="https://img.shields.io/badge/Platform-iOS-lightgrey.svg?logo=apple" alt="iOS" /> <img src="https://img.shields.io/badge/Platform-Windows/macOS/Linux-e10707.svg?logo=openjdk" alt="Platform JVM" />

An open-source AI assistant with persistent memory that runs on Android, iOS, Windows, Mac, Linux, and Web.

Documentation

Installation

Homebrew (macOS):

brew install --cask simonschubert/tap/kai

AUR (Arch Linux):

yay -S kai-bin

Winget (Windows):

winget install SimonSchubert.Kai

Direct Downloads

| Platform | Format | Download | |----------|--------|----------| | Android | APK | GitHub Releases | | macOS | DMG | GitHub Releases | | Windows | MSI | GitHub Releases | | Linux | DEB | GitHub Releases | | Linux | RPM | GitHub Releases | | Linux | AppImage | GitHub Releases |

Features

• Persistent memory — Kai remembers important details across conversations and uses them automatically
• Customizable soul — Define the AI's personality and behavior with an editable system prompt
• Multi-service fallback — 11+ LLM providers with automatic failover
• Tool execution — Web search, notifications, calendar events, shell commands, and more
• MCP server support — Connect to remote tool servers via the Model Context Protocol
• Autonomous heartbeat — Periodic self-checks that surface anything needing attention
• Settings export/import — Backup and restore all settings as a JSON file
• Encrypted storage — Conversations stored locally with encryption
• Text to speech — Listen to AI responses
• Image attachments — Attach images to any conversation

Screenshots

Desktop

Web

Mobile

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