WatchGuard XTM - Discontinued Product
Check Point Firewall Software Blade
pfSense
ClearOS
Cisco IronPort Web Security Appliance
Palo Alto Networks WildFire
FireEye Security Suite
Zscaler Web Security
Meraki MX Firewalls
Falcon Sandbox
Cisco Talos
Lookout
Check Point Firewall Software Blade - Check Point delivers the best security solutions withthe right architecture to prevent attacks in allof yourenvironments.
Palo Alto Networks WildFire - Firewall and Threat Intelligence
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
FireEye Security Suite - An enterprise-grade security solution for mid-market customers, combining detection, protection, and response capabilities for network, email and endpoint.
ClearOS - A very good alternative for Windows Server, for free
Zscaler Web Security - Zscaler offers cloud-based web security solutions.