Centripetal CleanINTERNET® is a commercial intrusion detection and prevention systems solution by Centripetal. Quad9 is a free intrusion detection and prevention systems solution. Features, integrations, deployment and the company behind each one, side by side.
Hi Citrix. Hide VPNs. Hide Windows on a LAN. Knocknoc solves this. Just in time identity linked allow-listing. DIY, on-premise or SaaS. Prevent attacks fast.
VisitReal-time network threat prevention platform enforcing 10B+ threat indicators.
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.
Centripetal CleanINTERNET® fits if you need to run it on your own servers.
Quad9 fits if you want a cloud product, you are a startup and you need a free product.
Common questions when comparing Centripetal CleanINTERNET® vs Quad9 for intrusion detection and prevention systems.
Centripetal CleanINTERNET®: Real-time network threat prevention platform enforcing 10B+ threat indicators. Built by Centripetal.
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. Centripetal CleanINTERNET® and Quad9 are both Intrusion Detection and Prevention Systems products. Key differences: Centripetal CleanINTERNET® 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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