# Fox IO JA4+ vs GREYCORTEX Mendel: side-by-side comparison (2026)

[Fox IO JA4+](https://cybersectools.com/tools/fox-io-ja4) is a commercial [network detection and response](https://cybersectools.com/categories/ndr) solution by [Fox IO](https://cybersectools.com/companies/fox-io). [GREYCORTEX Mendel](https://cybersectools.com/tools/greycortex-mendel) is a commercial [network detection and response](https://cybersectools.com/categories/ndr) solution by [GREYCORTEX](https://cybersectools.com/companies/greycortex). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Fox IO JA4+ | GREYCORTEX Mendel |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Network Detection and Response | Network Detection and Response |
| Verified | No | No |
| Deployment type | Hybrid | Hybrid |
| Company size fit | Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | Fox IO | GREYCORTEX |
| Headquarters | – | – |

### Use cases and capabilities

| | Fox IO JA4+ | GREYCORTEX Mendel |
|---|---|---|
| Fingerprinting | Yes | – |
| TLS | Yes | – |
| TCP | Yes | – |
| SSH | Yes | – |
| Bot Protection | Yes | – |
| C2 | Yes | – |
| Proxy | Yes | – |
| NDR | Yes | Yes |
| Zeek | Yes | – |
| Suricata | Yes | – |
| Network Monitoring | – | Yes |
| Anomaly Detection | – | Yes |
| IoT Security | – | Yes |
| SCADA | – | Yes |
| Flow Analysis | – | Yes |
| PCAP | – | Yes |
| Network Visibility | – | Yes |
| Critical Infrastructure | – | Yes |
| Threat Analysis | – | Yes |

### Core features

**Fox IO JA4+**

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

**GREYCORTEX Mendel**

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

### Integrations

**Fox IO JA4+**

2 integrations listed. Sign in on the page to see them.

**GREYCORTEX Mendel**

No integrations listed.

## Which one fits you

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

- [GREYCORTEX Mendel](https://cybersectools.com/tools/greycortex-mendel) fits if you are a small business.

## Fox IO JA4+ vs GREYCORTEX Mendel FAQ

Common questions when comparing Fox IO JA4+ vs GREYCORTEX Mendel for network detection and response.

### What is the difference between Fox IO JA4+ and GREYCORTEX Mendel?

**Fox IO JA4+**: Protocol-layer network fingerprinting suite for bot, proxy & malware detection. Built by Fox IO.

**GREYCORTEX Mendel**: Network detection and response platform for IT, IoT, and OT threat monitoring. Built by GREYCORTEX.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes Fox IO JA4+ and GREYCORTEX Mendel?

**Fox IO JA4+** is made by Fox IO. **GREYCORTEX Mendel** is made by GREYCORTEX. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Fox IO JA4+ a good alternative to GREYCORTEX Mendel?

Often, yes. Fox IO JA4+ and GREYCORTEX Mendel are both Network Detection and Response products, and both cover NDR. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Fox IO JA4+ vs Port0 Network Security](https://cybersectools.com/compare/fox-io-ja4-vs-port0-network-security)
- [Fox IO JA4+ vs Hypergraph AI](https://cybersectools.com/compare/fox-io-ja4-vs-hypergraph-ai)
- [Fox IO JA4+ vs Hyprfire Firebug](https://cybersectools.com/compare/fox-io-ja4-vs-hyprfire-firebug)
- [GREYCORTEX Mendel vs Port0 Network Security](https://cybersectools.com/compare/greycortex-mendel-vs-port0-network-security)
- [GREYCORTEX Mendel vs Hypergraph AI](https://cybersectools.com/compare/greycortex-mendel-vs-hypergraph-ai)
- [GREYCORTEX Mendel vs Hyprfire Firebug](https://cybersectools.com/compare/greycortex-mendel-vs-hyprfire-firebug)

## Alternatives to each

- [See all Fox IO JA4+ alternatives](https://cybersectools.com/alternatives/fox-io-ja4)
- [See all GREYCORTEX Mendel alternatives](https://cybersectools.com/alternatives/greycortex-mendel)

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Source: https://cybersectools.com/compare/fox-io-ja4-vs-greycortex-mendel

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More on Fox IO JA4+ and GREYCORTEX Mendel: 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