
Description: Portmaster is a free, open source application firewall and HTTPS proxy for Windows that protects against malicious content getting to your computer. It blocks malware, ads, and trackers from making connections.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Little Snitch is a macOS firewall that monitors outgoing and incoming connections, alerting you to any unexpected activity. It lets you choose to allow or deny connections for improved security and privacy.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API