# Act Free Assessment vs APT Simulator: side-by-side comparison (2026)

[Act Free Assessment](https://cybersectools.com/tools/act-free-assessment) is a free [breach & attack simulation](https://cybersectools.com/categories/threat-simulation) solution by [Act](https://cybersectools.com/companies/act). [APT Simulator](https://cybersectools.com/tools/apt-simulator) is a free [breach & attack simulation](https://cybersectools.com/categories/threat-simulation) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Act Free Assessment | APT Simulator |
|---|---|---|
| Pricing model | Free | Free |
| Category | Breach & Attack Simulation | Breach & Attack Simulation |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | – | 2,722 |
| Last commit | – | Sep 2025 |
| Company | Act | – |
| Headquarters | – | – |

### Use cases and capabilities

| | Act Free Assessment | APT Simulator |
|---|---|---|
| Attack Paths | Yes | – |
| Least Privilege | Yes | – |
| Data Exfiltration | Yes | – |
| Agentic AI Security | Yes | – |
| Cloud Native | Yes | – |
| Lateral Movement | Yes | – |
| Permissions | Yes | – |
| Security Validation | Yes | – |
| Visualization | Yes | – |
| Windows | – | Yes |
| APT | – | Yes |

### Core features

**Act Free Assessment**

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

**APT Simulator**

No features listed.

## Which one fits you

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

- [Act Free Assessment](https://cybersectools.com/tools/act-free-assessment) fits if you want a cloud product.
- [APT Simulator](https://cybersectools.com/tools/apt-simulator) fits if you need to run it on your own servers and you want an open-source product.

## Act Free Assessment vs APT Simulator FAQ

Common questions when comparing Act Free Assessment vs APT Simulator for breach & attack simulation.

### What is the difference between Act Free Assessment and APT Simulator?

**Act Free Assessment**: Free read-only cloud attack path simulation covering 5 real attack scenarios. Built by Act.

**APT Simulator**: APT Simulator is a tool for simulating a compromised system on Windows.

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

### Who makes Act Free Assessment and APT Simulator?

**Act Free Assessment** is made by Act. **APT Simulator** is open-source with 2,722 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Act Free Assessment a good alternative to APT Simulator?

Often, yes. Act Free Assessment and APT Simulator are both Breach & Attack Simulation products. Key differences: APT Simulator is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Act Free Assessment vs SafeBreach Exposure Validation Platform](https://cybersectools.com/compare/act-free-assessment-vs-safebreach-exposure-validation-platform)
- [Act Free Assessment vs Cybral STORM ATTACKER](https://cybersectools.com/compare/act-free-assessment-vs-cybral-storm-attacker)
- [Act Free Assessment vs Pentera Platform](https://cybersectools.com/compare/act-free-assessment-vs-pentera-pentera-platform)
- [APT Simulator vs SafeBreach Exposure Validation Platform](https://cybersectools.com/compare/apt-simulator-vs-safebreach-exposure-validation-platform)
- [APT Simulator vs Cybral STORM ATTACKER](https://cybersectools.com/compare/apt-simulator-vs-cybral-storm-attacker)
- [APT Simulator vs Pentera Platform](https://cybersectools.com/compare/apt-simulator-vs-pentera-pentera-platform)

## Alternatives to each

- [See all Act Free Assessment alternatives](https://cybersectools.com/alternatives/act-free-assessment)
- [See all APT Simulator alternatives](https://cybersectools.com/alternatives/apt-simulator)

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Source: https://cybersectools.com/compare/act-free-assessment-vs-apt-simulator

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More on Act Free Assessment and APT Simulator: 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