# IronNet IronDefense vs Mercury: side-by-side comparison (2026)

[IronNet IronDefense](https://cybersectools.com/tools/ironnet-irondefense) is a commercial [network detection and response](https://cybersectools.com/categories/ndr) solution by [IronNet](https://cybersectools.com/companies/ironnet). [Mercury](https://cybersectools.com/tools/mercury) 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

| | IronNet IronDefense | Mercury |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Network Detection and Response | Network Detection and Response |
| Verified | No | No |
| Deployment type | Hybrid | On-Premises |
| Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise |
| GitHub stars | – | 501 |
| Last commit | – | Mar 2026 |
| Company | IronNet | – |
| Headquarters | – | – |

### Use cases and capabilities

| | IronNet IronDefense | Mercury |
|---|---|---|
| Anomaly Detection | Yes | – |
| PCAP | Yes | Yes |
| Packet Capture | – | Yes |

### Core features

**IronNet IronDefense**

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

**Mercury**

No features listed.

### Integrations

**IronNet IronDefense**

1 integration listed. Sign in on the page to see them.

**Mercury**

No integrations listed.

## Which one fits you

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

- [IronNet IronDefense](https://cybersectools.com/tools/ironnet-irondefense) fits if you need both cloud and on-premises options.
- [Mercury](https://cybersectools.com/tools/mercury) fits if you need to run it on your own servers, you need a free product and you want an open-source product.

## IronNet IronDefense vs Mercury FAQ

Common questions when comparing IronNet IronDefense vs Mercury for network detection and response.

### What is the difference between IronNet IronDefense and Mercury?

**IronNet IronDefense**: Network detection and response platform for threat detection and visibility. Built by IronNet.

**Mercury**: Network metadata capture and analysis tool.

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

### Who makes IronNet IronDefense and Mercury?

**IronNet IronDefense** is made by IronNet. **Mercury** is open-source with 501 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is IronNet IronDefense a good alternative to Mercury?

Often, yes. IronNet IronDefense and Mercury are both Network Detection and Response products, and both cover PCAP. Key differences: IronNet IronDefense is Commercial while Mercury is Free, Mercury is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [IronNet IronDefense vs Red Piranha Crystal Eye NDR](https://cybersectools.com/compare/ironnet-irondefense-vs-red-piranha-crystal-eye-ndr)
- [IronNet IronDefense vs Viettel VCS-NSM](https://cybersectools.com/compare/ironnet-irondefense-vs-viettel-vcs-nsm)
- [IronNet IronDefense vs Corelight Open NDR Platform](https://cybersectools.com/compare/corelight-open-ndr-platform-vs-ironnet-irondefense)
- [Mercury vs Red Piranha Crystal Eye NDR](https://cybersectools.com/compare/mercury-vs-red-piranha-crystal-eye-ndr)
- [Mercury vs Viettel VCS-NSM](https://cybersectools.com/compare/mercury-vs-viettel-vcs-nsm)
- [Mercury vs Corelight Open NDR Platform](https://cybersectools.com/compare/corelight-open-ndr-platform-vs-mercury)

## Alternatives to each

- [See all IronNet IronDefense alternatives](https://cybersectools.com/alternatives/ironnet-irondefense)
- [See all Mercury alternatives](https://cybersectools.com/alternatives/mercury)

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Source: https://cybersectools.com/compare/ironnet-irondefense-vs-mercury

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More on IronNet IronDefense and Mercury: 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