OpenSnitch vs Safing Portmaster: side-by-side comparison (2026)

OpenSnitch: OpenSnitch is a GNU/Linux application firewall with interactive outbound connections filtering and system-wide domain blocking capabilities.

Safing Portmaster: An open-source application firewall that monitors network traffic with custom rules. Built by Safing.

The table above shows where their features, integrations, deployment and company size fit differ.

OpenSnitch is open-source with 12,981 GitHub stars. Safing Portmaster is made by Safing. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. OpenSnitch and Safing Portmaster are both Next-Gen Firewalls products, and both cover Linux. Key differences: OpenSnitch is open-source. Use the table above to see where features, deployment and company size fit differ.