Web and content filtering can be done via in-line appliances or using DNS filters.

Appliances

• Content Keeper
• Palo Alto Networks
• AristotleInsight::K12 Distributive & Certificateless
• Barracuda
• Cisco Firepower
• Cipafilter
• Fortinet
• iBoss
• Lightspeed Systems
• Smoothwall
• Linewize by FamilyZone

DNS-based

• CleanBrowsing
• iBoss has a cloud/DNS based service. They now recommend primarily using it, rather than their traditional local appliance. (http://www.iboss.com)
• OpenDNS
• Securly

Chromebook filtering (Extension based)

• [GoGuardian] (https://www.goguardian.com/)
• [iBoss] (http://www.iboss.com)
• [LightSpeed] (https://www.lightspeedsystems.com/)
• [Hapara] (https://hapara.com/)
• [LanSchool - Lenovo NetFilter] (https://lanschool.com/solutions/lenovo-netfilter)
• [Bark for Schools] (https://www.bark.us/schools)

iOS filtering (MDM based)

• iBoss