Altus is a free, open-source desktop client that brings WhatsApp Web functionality to Windows, macOS, and Linux. Built with Electron, it provides a dedicated messaging environment without requiring an open browser tab. Users can connect multiple WhatsApp accounts and access them simultaneously through separate tabs. The application supports native desktop notifications that open the corresponding conversation when clicked. An online indicator helps identify contacts who are currently available. Altus includes a built-in dark mode and a theme customizer for changing interface colors. Advanced users can also create custom CSS themes. System tray integration allows the application to continue receiving notifications while minimized.

Features

  • Multiple WhatsApp account management with simultaneous messaging sessions
  • Native desktop notifications with direct access to individual conversations
  • Online status indicators for identifying available WhatsApp contacts
  • Built-in dark mode with customizable interface color themes
  • Custom CSS theme support for advanced visual personalization
  • System tray minimization with background notification support

Project Samples

Project Activity

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Categories

Chat, Messaging

License

GNU General Public License version 3.0 (GPLv3)

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Altus Web Site

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Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

TypeScript

Related Categories

TypeScript Chat Software, TypeScript Messaging Platform

Registered

16 hours ago