DNSFilter vs Quad9

DNSFilter provides protective DNS and content filtering for organizations managing threats and workplace internet use. It categorizes billions of domains with Webshrinker machine-learning categorization, while AppAware can block more than 100 risky applications. DNSFilter says its real-time threat categorization can identify threats 10 days faster than other threat feeds. Deployments include network configuration, a DNS relay, and roaming clients for Windows, macOS, iOS, Android, and Chrome. Listed controls include DNS encryption such as DNS-over-TLS, custom blocklists, safe search, filtering schedules, and advanced activity reports. Active Directory Sync Tool supports up to 500,000 users and applies policies by user or group. Integrations include Microsoft Entra, Active Directory, Zapier, API access, and an MCP Connector. Data Export supports Amazon S3 and Splunk, with Microsoft Sentinel also named. API access is included in all plans, with rate limits but no overall usage cap. Pricing starts at $1/mo (annual), with a 14-day trial and no free plan.

Quad9 is a free recursive DNS service that blocks requests to domains associated with malware, viruses, adware, phishing and scams. It draws on threat information from more than 20 partners to identify malicious domains. The service supports DNS over TLS, DNS over HTTPS and DNSCrypt, and provides DNSSEC validation on its resolver services. Quad9 says it does not store end-user IP addresses and operates under Swiss privacy law. Its focus is malicious-domain blocking, not content filtering; it also does not offer custom domain policies. Setup documentation covers Cloudflared, Pi-hole and open-source routers including pfSense, OPNsense, OpenWrt, MikroTik RouterOS and IPFire. Support assists with setup questions and issues. Quad9 reports 99.999% uptime for its global anycast service. The service costs nothing, with no contract or sign-up process, and is listed for Android, iOS, Linux, macOS and Windows. Large organizations planning high-volume DNS traffic are asked to contact Quad9 first.