# GREYCORTEX Mendel vs Justniffer: side-by-side comparison (2026)

[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). [Justniffer](https://cybersectools.com/tools/justniffer) is a free [network detection and response](https://cybersectools.com/categories/ndr) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | GREYCORTEX Mendel | Justniffer |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Network Detection and Response | Network Detection and Response |
| Verified | No | No |
| Deployment type | Hybrid | On-Premises |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | GREYCORTEX | – |
| Headquarters | – | – |

### Use cases and capabilities

| | GREYCORTEX Mendel | Justniffer |
|---|---|---|
| NDR | 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 | – |
| Network Discovery | – | Yes |
| Protocol Analysis | – | Yes |

### Core features

**GREYCORTEX Mendel**

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

**Justniffer**

No features 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 need both cloud and on-premises options.
- [Justniffer](https://cybersectools.com/tools/justniffer) fits if you need to run it on your own servers, you are a startup and you need a free product.

## GREYCORTEX Mendel vs Justniffer FAQ

Common questions when comparing GREYCORTEX Mendel vs Justniffer for network detection and response.

### What is the difference between GREYCORTEX Mendel and Justniffer?

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

**Justniffer**: A network protocol analyzer for capturing and analyzing network traffic with a focus on TCP/IP flow reconstruction and response time tracking.

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

### Is GREYCORTEX Mendel a good alternative to Justniffer?

Often, yes. GREYCORTEX Mendel and Justniffer are both Network Detection and Response products. Key differences: GREYCORTEX Mendel is Commercial while Justniffer is Free. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [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)
- [Justniffer vs Port0 Network Security](https://cybersectools.com/compare/justniffer-vs-port0-network-security)
- [Justniffer vs Hypergraph AI](https://cybersectools.com/compare/hypergraph-ai-vs-justniffer)
- [Justniffer vs Hyprfire Firebug](https://cybersectools.com/compare/hyprfire-firebug-vs-justniffer)

## Alternatives to each

- [See all GREYCORTEX Mendel alternatives](https://cybersectools.com/alternatives/greycortex-mendel)
- [See all Justniffer alternatives](https://cybersectools.com/alternatives/justniffer)

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Source: https://cybersectools.com/compare/greycortex-mendel-vs-justniffer

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More on GREYCORTEX Mendel and Justniffer: 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