CacheGuard Gateway is described as 'Free, open-source network security appliance for startups, growing businesses, and SMEs/SMBs that need enterprise-grade protection without the complexity or cost' and is a Firewall in the security & privacy category. There are more than 100 alternatives to CacheGuard Gateway for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best CacheGuard Gateway alternative is AdGuard, which is both free and Open Source. Other great apps like CacheGuard Gateway are NextDNS, TrafficMonitor, OPNsense and pfSense.