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Atomic Red Team vs Infection Monkey

Both stand on breach and attack simulation software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Atomic Red Team

Free plan APILinuxMac+1

Atomic Red Team offers a free collection of mapped tests and tools for running them locally, remotely, or on a schedule. It does not automate emulation of a full attack group, and users need the environment owner's permission before execution.

Visit Atomic Red Team

Infection Monkey

Free plan LinuxSelf-hostedWeb+1

Choose Infection Monkey if you want a free, open-source tool to simulate attacks and map potential routes across your environment. Its reporting, plugin support, and coverage of on-premises and cloud environments support security control reviews. Teams should confirm their Monkey Island host uses x86-64 hardware and a supported operating system.

Visit Infection Monkey

The facts

Atomic Red TeamInfection Monkey
Free planYesYes
Open sourceNot publishedNot published
Runs onAPI, Linux, Mac, WindowsLinux, Self-hosted, Web, Windows
Lowest paid planFree or on requestFree or on request
Plans published11
MakerNot publishedNot published
Websiteatomicredteam.iotechdocs.akamai.com
On breach and attack simulation software#1 of 20#3 of 20

Atomic Red Team: what it does well

  • Free open-source project.
  • Tests map to MITRE ATT&CK.
  • Can run tests on remote machines.
  • Atomic Runner supports unattended scheduled runs.
  • Tests use a structured format with few dependencies.

What to know first

  • No automated emulation for a whole specific attack group.
  • Permission from the environment owner is required before tests.
  • Attack-group scenarios require manual test chaining.

Infection Monkey: what it does well

  • Maps visible machines, accessible services, and potential propagation routes.
  • Reports security issues discovered or exploited by agents.
  • Supports on-premises, container, public cloud, and private cloud environments.
  • Plugins can be managed through the Monkey Island interface.
  • Can run without internet access.

What to know first

  • The documented Monkey Island server requires an x86-64 processor.
  • The listed supported operating systems are Linux and Windows.

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