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Best Free Alternatives to GlassWire 3.7
Stop paying $35.88/yr (Personal) / $50.16/yr (Duo). Discover professional-grade tools that won't break your budget.
Category: Firewall & Network MonitorVerified for 2025
Top Recommended Replacements
Portmaster v2
FREETop Open-Source Alternative
Why we like it
100% free and open-source; system-wide privacy filtering that blocks trackers at the kernel level; includes DNS-over-HTTPS by default; v2 release (July 2025) introduced a more stable SQLite backend and joined forces with IVPN for better maintenance.
Keep in mind
The interface is functional but lacks GlassWire's 'beautiful' graphs; can occasionally break niche application connections without manual tuning.
TinyWall 3.3
FREEBest Lightweight Alternative
Why we like it
Completely free with no 'Pro' version; zero pop-ups (it blocks by default); extremely low resource usage; purely acts as a hardened controller for the native Windows Firewall.
Keep in mind
No visual bandwidth graphs or world maps; requires a 'whitelist-only' mindset which can be tedious during initial setup.
Simplewall
FREEBest for Advanced Control
Why we like it
Simple, small, and open-source; uses Windows Filtering Platform (WFP) directly; allows for very granular 'Block All' or 'Allow Only' rules; includes a portable mode.
Keep in mind
Interface is a bit 'old-school' Windows style; lacks the network history and device discovery tools found in GlassWire.
NetLimiter 5
FREEBest for Bandwidth Management
Why we like it
The gold standard for controlling speeds; allows you to set exact 'limits' on specific apps (e.g., 'Cap Steam downloads to 1MB/s'); includes detailed traffic stats.
Keep in mind
Not a traditional security-focused firewall; the UI is more technical and data-heavy.
Comodo Firewall
FREEBest for Legacy Security
Why we like it
Includes a powerful HIPS (Host Intrusion Prevention System); very mature technology; high level of customization for expert users.
Keep in mind
Frequent pop-ups can cause 'alert fatigue'; interface feels dated and can be cluttered with other Comodo product ads.
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