Packet Forensics Network Effects Engine & cQuery is a commercial intrusion detection and prevention systems solution by Packet Forensics. Quad9 is a free intrusion detection and prevention systems solution. Features, integrations, deployment and the company behind each one, side by side.
A free DNS recursive service that blocks malicious host names and protects user privacy.
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Based on what each listing shows: deployment, company size, price and open source.
Packet Forensics Network Effects Engine & cQuery fits if you need both cloud and on-premises options.
Quad9 fits if you want a cloud product, you are a startup and you need a free product.
Common questions when comparing Packet Forensics Network Effects Engine & cQuery vs Quad9 for intrusion detection and prevention systems.
Packet Forensics Network Effects Engine & cQuery: Built by Packet Forensics.
Quad9: A free DNS recursive service that blocks malicious host names and protects user privacy.
The table above shows where their features, integrations, deployment and company size fit differ.
Often, yes. Packet Forensics Network Effects Engine & cQuery and Quad9 are both Intrusion Detection and Prevention Systems products, and both cover DNS Security. Key differences: Packet Forensics Network Effects Engine & cQuery is Commercial while Quad9 is Free. Use the table above to see where features, deployment and company size fit differ.
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Updated 2026-11-02
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