pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more.




Sophos XG Firewall is described as 'A modern replacement for Sophos UTM based on Sophos, Cyberoam and Astaro technology combined' and is a Firewall in the security & privacy category. There are eight alternatives to Sophos XG Firewall for a variety of platforms, including Linux, Self-Hosted, VMware vSphere Hypervisor, Microsoft Hyper-V Server and Proxmox Virtual Environment apps. The best Sophos XG Firewall alternative is pfSense, which is both free and Open Source. Other great apps like Sophos XG Firewall are ClearOS, Endian Firewall Community, Sophos UTM and CacheGuard Gateway.
pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more.




ClearOS is a family of operating systems for the enterprise, small business, and home. There are three editions to choose from depending on your needs and suitable to your abilities. They are: ClearOS Enterprise, ClearOS Home, and ClearOS Core.



Endian Firewall Community (EFW) is a "turn-key" linux security distribution that turns every system into a full featured security appliance with Unified Threat Management (UTM) functionality. The software has been designed with "usability in mind" and is very...



Sophos UTM integrates complete security software within a single appliance. Choose only the protection you need when you need it. And deploy it on the platform that best fits your business: software, hardware or virtual appliance.



CacheGuard Gateway is a free and open-source Unified Threat Management (UTM) solution, a Web Application Firewall (WAF), and a Quality of Service (QoS) platform designed to optimize WAN traffic. To obtain a CacheGuard Gateway appliance, download CacheGuard-OS and install it on...

Protect your network from viruses, malware and malicious activity with Kerio Control, the easy-to-administer yet powerful all-in-one security solution.




Scrollout F1 is a free self-hosted email gateway designed for Linux & Windows administrators without advanced email security experience.

Microsoft Forefront Threat Management Gateway (Forefront TMG), formerly known as Microsoft Internet Security and Acceleration Server (ISA Server), is a network security and protection solution for Microsoft Windows, described by Microsoft as "enables businesses by allowing...

one is an OS, the other is an app