HYAS Protect Protective DNS vs Quad9: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
HYAS Protect Protective DNS is a commercial intrusion detection and prevention systems tool by HYAS. Quad9 is a free intrusion detection and prevention systems tool. Compare features, ratings, integrations, and community reviews side by side to find the best intrusion detection and prevention systems fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Organizations between 50 and 2,000 employees need HYAS Protect Protective DNS because it blocks malicious domains at network egress without requiring endpoint agents, cutting deployment friction to weeks instead of months. The hybrid architecture and API-driven integration with your existing EDR and SIEM means you're actually using the threat intelligence instead of letting it sit in another console. Skip this if your primary concern is post-breach forensics; HYAS Protect prioritizes prevention and continuous monitoring over recovery workflows, which leaves gaps in incident reconstruction that a dedicated SIEM handles better.
Small to mid-market security teams without dedicated DNS filtering infrastructure should start with Quad9, since it blocks malicious domains at the recursive resolver level before traffic ever reaches your network. The service blocks against multiple threat intelligence feeds including abuse.ch and Spamhaus, and requires zero endpoint deployment or license management. Skip this if you need role-based access controls, custom blocklists tuned to your industry, or DNS logging that feeds into your SIEM; Quad9 prioritizes simplicity and privacy over operational visibility.
