mullvad/mullvadvpn-app

Mullvad VPN is a VPN client application for desktop and mobile platforms that prioritizes privacy and security through its design and implementation.

The tool addresses the need for a privacy-preserving VPN client by implementing multiple layers of traffic leak prevention and defaulting all settings to the more secure option, requiring users to explicitly opt into looser rules. It provides both graphical and command-line interfaces on desktop, with a system daemon handling tunnel and security operations. The application supports multiple VPN protocols including WireGuard with various obfuscation methods such as tunneling over TCP, Shadowsocks, QUIC, and Lightweight WireGuard Obfuscation. Additional security features include quantum-resistant tunnels, multihop routing, custom DNS configuration, and content blocking for advertisements.

Developers should choose this tool if they need a VPN client with strong privacy guarantees across multiple platforms. The project suits organizations and individuals requiring consistent security features across Windows, Linux, macOS, Android, and iOS. Desktop users gain access to both graphical and command-line interfaces, while mobile users receive platform-specific implementations optimized for their respective ecosystems. The codebase is written primarily in Rust, with desktop interfaces built using Electron and Node.js. All releases are cryptographically signed and verifiable, with security audits conducted externally across all supported platforms.

The project maintains active development across its desktop and mobile codebases, with regular releases distributed through official channels including the project website, GitHub releases, Google Play, F-Droid, and the App Store. The development process emphasizes security in both the application itself and the release pipeline, with documented attention to secure development practices including Git signature verification. The project provides comprehensive platform support documentation and maintains an automated test suite covering multiple operating systems and architectures.