Viscosity by SparkLabs is a VPN client for macOS and Windows built for creating, managing, and monitoring OpenVPN connections. It is designed for both new VPN users and technical users who want detailed control without relying on command-line configuration.

VPN connection management

Viscosity connects to existing OpenVPN servers, including workplace networks, home VPN setups, VPN service providers, and other compatible environments. Users can import OpenVPN configurations or create new connections through an intuitive editor.

The app supports detailed setup for networking, routing, DNS behavior, and authentication, including multi-factor authentication options. Because Viscosity is focused on OpenVPN, users who need native support for other VPN protocols may need a different VPN client.

DNS, routing, and advanced networking

The app includes flexible DNS controls that allow all DNS queries to use VPN DNS servers or apply VPN DNS only to selected domains. Its routing tools help users control which traffic goes through the VPN. Viscosity also supports IPv6, traffic obfuscation, advanced networking options, connection folders, and simultaneous VPN connections.

Monitoring and automation

Viscosity provides real-time connection monitoring through its menu-bar or system-tray interface, along with a detailed view that shows traffic graphs, network information, encryption details, and connection statistics. Advanced users can automate behavior with platform-specific scripting tools, such as AppleScript on macOS, VBScript on Windows, and custom scripts or actions that run when a VPN connection changes state.

Reliable OpenVPN management app

Viscosity is a strong choice for anyone who needs a configurable OpenVPN client with platform integration, monitoring tools, flexible DNS handling, and automation support. It is simple enough for general VPN users while offering the depth administrators and power users expect.