Top Free
Network Monitor / Firewall Alternatives

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

Tools Tested

100%

Free or Open Source

Database Updated Dec 2025

Hand-Picked Comparisons

Save $3.00/mo ($35.88 billed annually)

GlassWire Pro 3.3.6

A visually stunning network monitor and firewall. The late 2025 'v3.3' generation features a refreshed 'Interactive World Map,' RDP connection detection for security, and a 'Network Time Machine' to view past server activity. While it offers unmatched data visualization for your 'Best Free Alternatives' server traffic, its recent pricing shift and high memory usage compared to lightweight rivals like Simplewall have made it less appealing to performance purists.

Top Recommended Replacement

PortmasterPRO CHOICE

The 2025 privacy powerhouse; 100% free and open-source; features system-wide ad-blocking and an optional 'Safing Privacy Network' (SPN) that routes every app through a different IP; incredibly granular control.

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Mastering Network Monitor / Firewall 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 Network Monitor / Firewall alternatives are production-ready.