# Cobalt Strike's ExternalC2 framework vs Ethiack: side-by-side comparison (2026)

[Cobalt Strike's ExternalC2 framework](https://cybersectools.com/tools/cobalt-strikes-externalc2-framework) is a free [red-team & adversary emulation](https://cybersectools.com/categories/offensive-security) solution. [Ethiack](https://cybersectools.com/tools/ethiack) is a commercial [red-team & adversary emulation](https://cybersectools.com/categories/offensive-security) solution by [Ethiack](https://cybersectools.com/companies/ethiack). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Cobalt Strike's ExternalC2 framework | Ethiack |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Red-Team & Adversary Emulation | Red-Team & Adversary Emulation |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | Enterprise | SMB, Mid-Market, Enterprise |
| Company | – | Ethiack |
| Headquarters | – | – |

### Use cases and capabilities

| | Cobalt Strike's ExternalC2 framework | Ethiack |
|---|---|---|
| C2 | Yes | – |
| Continuous Testing | – | Yes |
| VAPT | – | Yes |
| Security Scanning | – | Yes |

### Core features

**Cobalt Strike's ExternalC2 framework**

No features listed.

**Ethiack**

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.

- [Cobalt Strike's ExternalC2 framework](https://cybersectools.com/tools/cobalt-strikes-externalc2-framework) fits if you need to run it on your own servers and you need a free product.
- [Ethiack](https://cybersectools.com/tools/ethiack) fits if you want a cloud product and you are a small business or a mid-market company.

## Cobalt Strike's ExternalC2 framework vs Ethiack FAQ

Common questions when comparing Cobalt Strike's ExternalC2 framework vs Ethiack for red-team & adversary emulation.

### What is the difference between Cobalt Strike's ExternalC2 framework and Ethiack?

**Cobalt Strike's ExternalC2 framework**: A specification/framework for extending default C2 communication channels in Cobalt Strike.

**Ethiack**: AI-powered continuous pentesting platform combining autonomous agents with human hackers. Built by Ethiack.

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

### Is Cobalt Strike's ExternalC2 framework a good alternative to Ethiack?

Often, yes. Cobalt Strike's ExternalC2 framework and Ethiack are both Red-Team & Adversary Emulation products. Key differences: Cobalt Strike's ExternalC2 framework is Free while Ethiack is Commercial. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Cobalt Strike's ExternalC2 framework vs Fortra Cobalt Strike](https://cybersectools.com/compare/cobalt-strikes-externalc2-framework-vs-fortra-cobalt-strike)
- [Cobalt Strike's ExternalC2 framework vs Core Security Cobalt Strike](https://cybersectools.com/compare/cobalt-strikes-externalc2-framework-vs-core-security-cobalt-strike)
- [Cobalt Strike's ExternalC2 framework vs Core Security Outflank Security Tooling](https://cybersectools.com/compare/cobalt-strikes-externalc2-framework-vs-core-security-outflank-security-tooling)
- [Ethiack vs Fortra Cobalt Strike](https://cybersectools.com/compare/ethiack-vs-fortra-cobalt-strike)
- [Ethiack vs Core Security Cobalt Strike](https://cybersectools.com/compare/core-security-cobalt-strike-vs-ethiack)
- [Ethiack vs Core Security Outflank Security Tooling](https://cybersectools.com/compare/core-security-outflank-security-tooling-vs-ethiack)

## Alternatives to each

- [See all Cobalt Strike's ExternalC2 framework alternatives](https://cybersectools.com/alternatives/cobalt-strikes-externalc2-framework)
- [See all Ethiack alternatives](https://cybersectools.com/alternatives/ethiack)

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Source: https://cybersectools.com/compare/cobalt-strikes-externalc2-framework-vs-ethiack

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/cobalt-strikes-externalc2-framework.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Cobalt Strike's ExternalC2 framework and Ethiack: 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