# Alt Security Autonomous Pentesting Platform vs Legion: side-by-side comparison (2026)

[Alt Security Autonomous Pentesting Platform](https://cybersectools.com/tools/alt-security-autonomous-pentesting-platform) is a commercial [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution by [Alt Security](https://cybersectools.com/companies/alt-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

| | Alt Security Autonomous Pentesting Platform | 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 | Alt Security | – |
| Headquarters | – | – |

### Use cases and capabilities

| | Alt Security Autonomous Pentesting Platform | Legion |
|---|---|---|
| AI Pentesting | Yes | – |
| Continuous Testing | Yes | – |
| Attack Paths | Yes | – |
| DAST | Yes | – |
| Reconnaissance | Yes | Yes |
| OWASP | Yes | – |
| Black Box Testing | Yes | – |
| Vulnerability | Yes | – |
| Web Security | Yes | – |
| Scanner | – | Yes |

### Core features

**Alt Security Autonomous Pentesting Platform**

10 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.

- [Alt Security Autonomous Pentesting Platform](https://cybersectools.com/tools/alt-security-autonomous-pentesting-platform) 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.

## Alt Security Autonomous Pentesting Platform vs Legion FAQ

Common questions when comparing Alt Security Autonomous Pentesting Platform vs Legion for penetration testing.

### What is the difference between Alt Security Autonomous Pentesting Platform and Legion?

**Alt Security Autonomous Pentesting Platform**: AI-autonomous pentesting platform for continuous web, API & AI app testing, built by Alt 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 Alt Security Autonomous Pentesting Platform and Legion?

**Alt Security Autonomous Pentesting Platform** is made by Alt 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 Alt Security Autonomous Pentesting Platform a good alternative to Legion?

Often, yes. Alt Security Autonomous Pentesting Platform and Legion are both Penetration Testing products, and both cover Reconnaissance. Key differences: Alt Security Autonomous Pentesting Platform 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

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

## Alternatives to each

- [See all Alt Security Autonomous Pentesting Platform alternatives](https://cybersectools.com/alternatives/alt-security-autonomous-pentesting-platform)
- [See all Legion alternatives](https://cybersectools.com/alternatives/legion)

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Source: https://cybersectools.com/compare/alt-security-autonomous-pentesting-platform-vs-legion

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

More on Alt Security Autonomous Pentesting Platform 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