# Infection Monkey

Infection Monkey is a Breach & Attack Simulation product. It runs on-premises. Pricing is free.

An open-source security tool that simulates network breaches by self-propagating across data centers to test organizational resilience against lateral movement attacks.

Checked October 2026.

## What is Infection Monkey?

Infection Monkey is an open-source security tool designed to test data center resilience against perimeter breaches and internal server infections.

The tool consists of two main components:
- Monkey: An agent that infects machines and propagates across the network using various methods
- Monkey Island: A centralized server that controls the Monkey agents and provides visualization of their progress

The system operates by deploying the Monkey agent, which attempts to spread laterally through the network infrastructure, simulating how an actual breach might propagate within an organization's data center environment. All activities and results are reported back to the Monkey Island server for analysis and visualization.

The tool helps organizations identify vulnerabilities in their network segmentation, access controls, and internal security measures by demonstrating potential attack paths that malicious actors could exploit.

Tags: Red Team, Lateral Movement, Open Source, Network Reconnaissance

## Where it fits in your security program (NIST CSF 2.0)

- [Identify](https://cybersectools.com/guides/building-identify-program-small-team): helps you know your assets and your risks.

## Quick facts

- Category: [Offensive Security](https://cybersectools.com/categories/offensive-security-testing) · [Breach & Attack Simulation](https://cybersectools.com/categories/threat-simulation)
- Deployment: On-Premises
- Company size fit: Mid-Market, Enterprise
- Pricing model: Free
- GitHub stars: 6,975
- Website: github.com

## Infection Monkey FAQ

### What is Infection Monkey?

Infection Monkey is a product in the Breach & Attack Simulation category. It covers Red Team, Lateral Movement and Open Source.

### What is the pricing for Infection Monkey?

Infection Monkey is free. Download and setup instructions are at https://github.com/guardicore/monkey/.

### What are alternatives to Infection Monkey?

Alternatives to Infection Monkey listed on CybersecTools:

1. [SafeBreach Exposure Validation Platform](https://cybersectools.com/tools/safebreach-exposure-validation-platform) - Exposure validation platform combining BAS and attack path validation (CART) (Commercial)
2. [Pentera RansomwareReady™](https://cybersectools.com/tools/pentera-ransomwarereadytm) - Automated ransomware attack emulation platform for defense validation (Commercial)
3. [Filigran OpenAEV](https://cybersectools.com/tools/filigran-openaev) - Open-source threat-informed exposure validation platform for attack simulation (Commercial)
4. [Cybral STORM ATTACKER](https://cybersectools.com/tools/cybral-storm-attacker) - BAS tool that validates exploit paths via safe, controlled attack simulations. (Commercial)
5. [ZAIUX® Evo](https://cybersectools.com/tools/zaiux-zaiuxr-evo) - SaaS BAS platform automating C2 attacks with AI-driven remediation plans (Commercial)

Compare all Infection Monkey alternatives at [https://cybersectools.com/alternatives/infection-monkey](https://cybersectools.com/alternatives/infection-monkey)

### What deployment and organization size does Infection Monkey fit?

Infection Monkey is available as on-premises software. It is listed for mid-market companies and enterprises. It is free.

## Compare Infection Monkey with similar solutions

- [Infection Monkey vs SafeBreach Exposure Validation Platform](https://cybersectools.com/compare/infection-monkey-vs-safebreach-exposure-validation-platform)
- [Infection Monkey vs Pentera RansomwareReady™](https://cybersectools.com/compare/infection-monkey-vs-pentera-ransomwarereadytm)
- [Infection Monkey vs Filigran OpenAEV](https://cybersectools.com/compare/filigran-openaev-vs-infection-monkey)

All alternatives to Infection Monkey: [/alternatives/infection-monkey](https://cybersectools.com/alternatives/infection-monkey)

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Source: https://cybersectools.com/tools/infection-monkey

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More on Infection Monkey: 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=product-md