Because Cloudflare is a profit-oriented commercial service provider, despite their focus on privacy.
3. OpenDNS
OpenDNS is one of the most popular and long-standing DNS servers. They offer two types of services, OpenDNS FamilyShield which focuses more on child safety, and OpenDNS Home which provides advanced settings for adults. By using 208.67.222.222 and 208.67.220.220 , OpenDNS can increase the security and control over your network.
Benefits of using OpenDNS:
Family Control: This service is perfect for families with its content phone number list filtering features.
Security and Protection: Provides protection against malware and phishing attacks.
Customization: Allows users to configure DNS settings as needed.
On the downside, OpenDNS isn't always as fast as Google or Cloudflare, and the advanced settings can be a little confusing for first-time users.
4. Quad9 DNS
Quad9 is a DNS service that emphasizes security by blocking access to sites identified as sources of malware or phishing. Using 9.9.9.9 as the primary IP address, Quad9 also supports DNS encryption and focuses on user protection.
Benefits of using Quad9 DNS: