# Chaos Client vs MeerCAT-Pro: side-by-side comparison (2026)

[Chaos Client](https://cybersectools.com/tools/chaos-client) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. [MeerCAT-Pro](https://cybersectools.com/tools/meercat-pro) is a commercial [cyber asset attack surface management](https://cybersectools.com/categories/caasm) solution by [Secure Decisions](https://cybersectools.com/companies/secure-decisions). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions) picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Mandiant Attack Surface Management and 4 more.

## Side-by-side comparison

| | Chaos Client | MeerCAT-Pro |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | External Attack Surface Management | Cyber Asset Attack Surface Management |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| GitHub stars | 763 | – |
| Last commit | Apr 2024 | – |
| Company | – | Secure Decisions |
| Headquarters | – | – |

### Use cases and capabilities

| | Chaos Client | MeerCAT-Pro |
|---|---|---|
| Reconnaissance | Yes | – |
| Wireless Security | – | Yes |
| Visualization | – | Yes |
| Network Discovery | – | Yes |
| Packet Capture | – | Yes |

### Core features

**Chaos Client**

No features listed.

**MeerCAT-Pro**

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

### Integrations

**Chaos Client**

No integrations listed.

**MeerCAT-Pro**

7 integrations 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.

- [Chaos Client](https://cybersectools.com/tools/chaos-client) fits if you want a cloud product, you are a startup or a small business, you need a free product and you want an open-source product.
- [MeerCAT-Pro](https://cybersectools.com/tools/meercat-pro) fits if you need to run it on your own servers.

## Chaos Client vs MeerCAT-Pro FAQ

Common questions when comparing Chaos Client vs MeerCAT-Pro for external attack surface management.

### What is the difference between Chaos Client and MeerCAT-Pro?

**Chaos Client**: A Go client to communicate with Chaos DB API.

**MeerCAT-Pro**: GIS-based visual analytics tool for wireless security risk assessment, built by Secure Decisions.

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

### Who makes Chaos Client and MeerCAT-Pro?

**Chaos Client** is open-source with 763 GitHub stars. **MeerCAT-Pro** is made by Secure Decisions. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Chaos Client a good alternative to MeerCAT-Pro?

In part. Chaos Client and MeerCAT-Pro are not in the same category on CybersecTools. Key differences: Chaos Client is Free while MeerCAT-Pro is Commercial, Chaos Client is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Chaos Client vs Censys Attack Surface Management](https://cybersectools.com/compare/censys-attack-surface-management-vs-chaos-client)
- [Chaos Client vs CyCognito EASM Platform](https://cybersectools.com/compare/chaos-client-vs-cycognito-easm-platform)
- [Chaos Client vs Aleph Search](https://cybersectools.com/compare/aleph-search-clear-vs-chaos-client)
- [MeerCAT-Pro vs Censys Attack Surface Management](https://cybersectools.com/compare/censys-attack-surface-management-vs-meercat-pro)
- [MeerCAT-Pro vs CyCognito EASM Platform](https://cybersectools.com/compare/cycognito-easm-platform-vs-meercat-pro)
- [MeerCAT-Pro vs Aleph Search](https://cybersectools.com/compare/aleph-search-clear-vs-meercat-pro)

## Alternatives to each

- [See all Chaos Client alternatives](https://cybersectools.com/alternatives/chaos-client)
- [See all MeerCAT-Pro alternatives](https://cybersectools.com/alternatives/meercat-pro)

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Source: https://cybersectools.com/compare/chaos-client-vs-meercat-pro

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

More on Chaos Client and MeerCAT-Pro: 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