Top Free
Firewall & Network Monitor Alternatives

Professional-grade replacements for Firewall & Network Monitor software. Verified for features, security, and zero cost.

Tools Tested

100%

Free or Open Source

Database Updated Dec 2025

Hand-Picked Comparisons

Save $35.88/yr (Personal) / $50.16/yr (Duo)

GlassWire 3.7

A visually stunning network monitor and firewall. The late 2025 update (v3.7) features Anomaly Detection, improved 'Who's on My WiFi' scanning, and deeper RDP connection alerts. It excels at showing users exactly where their data is going via an interactive world map and timeline. However, the 'Free' version is now mostly a monitor; core firewall controls like 'Ask to Connect' and 'Lockdown' require a recurring subscription.

Top Recommended Replacement

Portmaster v2PRO CHOICE

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.

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Mastering Firewall & Network Monitor for Free

Our mission at Best Free Alternatives is to democratize access to high-end digital tools. The software listed above provides professional-grade results without the burden of monthly subscriptions. Whether you are a student, freelancer, or small business owner, these Firewall & Network Monitor alternatives are production-ready.