# Autonomous Penetration Testing Tool vs Legion: side-by-side comparison (2026)

[Autonomous Penetration Testing Tool](https://cybersectools.com/tools/autonomous-penetration-testing-tool) is a commercial [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution by [Astra Security](https://cybersectools.com/companies/astra-security). [Legion](https://cybersectools.com/tools/legion) is a free [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Autonomous Penetration Testing Tool | Legion |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Penetration Testing | Penetration Testing |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market |
| GitHub stars | – | 1,052 |
| Last commit | – | Oct 2024 |
| Company | Astra Security | – |
| Headquarters | – | – |

### Use cases and capabilities

| | Autonomous Penetration Testing Tool | Legion |
|---|---|---|
| AI Pentesting | Yes | – |
| VAPT | Yes | – |
| Continuous Testing | Yes | – |
| DAST | Yes | – |
| OWASP | Yes | – |
| Vulnerability | Yes | – |
| App Security | Yes | – |
| Agentic AI Security | Yes | – |
| Web Security | Yes | – |
| Reconnaissance | – | Yes |
| Scanner | – | Yes |

### Core features

**Autonomous Penetration Testing Tool**

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

**Legion**

No features listed.

## Which one fits you

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

- [Autonomous Penetration Testing Tool](https://cybersectools.com/tools/autonomous-penetration-testing-tool) fits if you want a cloud product and you are an enterprise.
- [Legion](https://cybersectools.com/tools/legion) fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.

## Autonomous Penetration Testing Tool vs Legion FAQ

Common questions when comparing Autonomous Penetration Testing Tool vs Legion for penetration testing.

### What is the difference between Autonomous Penetration Testing Tool and Legion?

**Autonomous Penetration Testing Tool**: AI agent-based autonomous pentesting tool for continuous web app vulnerability discovery, built by Astra Security.

**Legion**: An open source network penetration testing framework with automatic recon and scanning capabilities.

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

### Who makes Autonomous Penetration Testing Tool and Legion?

**Autonomous Penetration Testing Tool** is made by Astra Security. **Legion** is open-source with 1,052 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Autonomous Penetration Testing Tool a good alternative to Legion?

Often, yes. Autonomous Penetration Testing Tool and Legion are both Penetration Testing products. Key differences: Autonomous Penetration Testing Tool is Commercial while Legion is Free, Legion is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Autonomous Penetration Testing Tool vs Alt Security Autonomous Pentesting Platform](https://cybersectools.com/compare/alt-security-autonomous-pentesting-platform-vs-autonomous-penetration-testing-tool)
- [Autonomous Penetration Testing Tool vs Novee AI Pentesting](https://cybersectools.com/compare/autonomous-penetration-testing-tool-vs-novee-ai-pentesting)
- [Autonomous Penetration Testing Tool vs Tenzai](https://cybersectools.com/compare/autonomous-penetration-testing-tool-vs-tenzai)
- [Legion vs Alt Security Autonomous Pentesting Platform](https://cybersectools.com/compare/alt-security-autonomous-pentesting-platform-vs-legion)
- [Legion vs Novee AI Pentesting](https://cybersectools.com/compare/legion-vs-novee-ai-pentesting)
- [Legion vs Tenzai](https://cybersectools.com/compare/legion-vs-tenzai)

## Alternatives to each

- [See all Autonomous Penetration Testing Tool alternatives](https://cybersectools.com/alternatives/autonomous-penetration-testing-tool)
- [See all Legion alternatives](https://cybersectools.com/alternatives/legion)

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Source: https://cybersectools.com/compare/autonomous-penetration-testing-tool-vs-legion

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

More on Autonomous Penetration Testing Tool and Legion: 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