There are several Online DNS services that provide DNS filtering capabilities and family safe browsing. Two examples of these services are OpenDNS and 1.1.1.1 For Families from Cloudflare.
Fundamentally Cyberblock DB service coupled with a home network DNS filter solution( like Pi Hole ) provides the same function that online DNS providers do. However, the Cyberblock DB based system can provide additional capabilities and benefits that these Online DNS providers can't.