GlassWire is described as 'Visualizes network activity, alerts on suspicious behavior, manages firewall rules, reports new app connections, and identifies potential threats' and is a very popular Network Monitor in the network & admin category. There are more than 50 alternatives to GlassWire for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best GlassWire alternative is simplewall, which is both free and Open Source. Other great apps like GlassWire are Portmaster, Little Snitch, TrafficMonitor and Fort Firewall.
GlassWire alternatives are mainly Network Monitors, but if you're looking for
Firewalls or Privacy Tools you can filter on that. Other popular filters include
Android,
Open Source,
Linux,
Mac,
Free and
Windows. These are just examples - use the filter bar below to find more specific alternatives to GlassWire.