# Centripetal CleanINTERNET® vs Quad9: side-by-side comparison (2026)

[Centripetal CleanINTERNET®](https://cybersectools.com/tools/centripetal-cleaninternetr) is a commercial [intrusion detection and prevention systems](https://cybersectools.com/categories/idps) solution by [Centripetal](https://cybersectools.com/companies/centripetal). [Quad9](https://cybersectools.com/tools/quad9) is a free [intrusion detection and prevention systems](https://cybersectools.com/categories/idps) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Centripetal CleanINTERNET® | Quad9 |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Intrusion Detection and Prevention Systems | Intrusion Detection and Prevention Systems |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Centripetal | – |
| Headquarters | – | – |

### Use cases and capabilities

| | Centripetal CleanINTERNET® | Quad9 |
|---|---|---|
| Threat Feed | Yes | – |
| Traffic Filtering | Yes | – |
| Cyber Threat Intelligence | Yes | – |
| Network Protection | Yes | – |
| DNS Security | – | Yes |

### Core features

**Centripetal CleanINTERNET®**

7 features listed. Sign in on the page to see them.

**Quad9**

10 features listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [Centripetal CleanINTERNET®](https://cybersectools.com/tools/centripetal-cleaninternetr) fits if you need to run it on your own servers.
- [Quad9](https://cybersectools.com/tools/quad9) fits if you want a cloud product, you are a startup and you need a free product.

## Centripetal CleanINTERNET® vs Quad9 FAQ

Common questions when comparing Centripetal CleanINTERNET® vs Quad9 for intrusion detection and prevention systems.

### What is the difference between Centripetal CleanINTERNET® and Quad9?

**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.

### Is Centripetal CleanINTERNET® a good alternative to Quad9?

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.

## Related comparisons

- [Centripetal CleanINTERNET® vs threatER](https://cybersectools.com/compare/centripetal-cleaninternetr-vs-threater)
- [Centripetal CleanINTERNET® vs Intrusion Shield](https://cybersectools.com/compare/centripetal-cleaninternetr-vs-intrusion-shield)
- [Centripetal CleanINTERNET® vs Axiom Cyber HakTrap](https://cybersectools.com/compare/axiom-cyber-haktrap-vs-centripetal-cleaninternetr)
- [Quad9 vs threatER](https://cybersectools.com/compare/quad9-vs-threater)
- [Quad9 vs Intrusion Shield](https://cybersectools.com/compare/intrusion-shield-vs-quad9)
- [Quad9 vs Axiom Cyber HakTrap](https://cybersectools.com/compare/axiom-cyber-haktrap-vs-quad9)

## Alternatives to each

- [See all Centripetal CleanINTERNET® alternatives](https://cybersectools.com/alternatives/centripetal-cleaninternetr)
- [See all Quad9 alternatives](https://cybersectools.com/alternatives/quad9)

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Source: https://cybersectools.com/compare/centripetal-cleaninternetr-vs-quad9

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/centripetal-cleaninternetr.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Centripetal CleanINTERNET® and Quad9: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md