The best Privacy Tool alternative to GlassWire is Portmaster, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to GlassWire and seven of them are Privacy Tools so hopefully you can find a suitable replacement. Other interesting Privacy Tool alternatives to GlassWire are Little Snitch, OpenSnitch, InviZible Pro and Minimal Firewall.
GlassWire alternatives are mainly Privacy Tools, but if you're looking for
Firewalls or Network Monitors you can filter on that. Other popular filters include
Mac,
Open Source,
Android,
Free,
Linux and
Windows. These are just examples - use the filter bar below to find more specific alternatives to GlassWire.
Powerful control for the tech-savvy. More free firewall blocking options than Glasswire, which only allows 2 blocks for free.