Atomic Red Team
Atomic Red Team: A free, focused testing library for teams validating controls across major operating systems. Ranked #14 of 20 in Breach and Attack Simulation Software by our editors (7.9/10); pricing: Free plan; best for teams seeking free ATT&CK-mapped testing.
At a glance
- Editor score7.9 / 10
- PricingFree plan
- Best forTeams seeking free ATT&CK-mapped testing
- Free planYes
- Paid fromFree
- Continuous schedulingYes
- Facts checked20 Sep 2026
Where it wins
- Free, open-source library with MITRE ATT&CK-mapped tests
- Supports Windows, macOS, Linux, and selected cloud environments
- Includes arguments, cleanup, scheduling, and remote execution
Where it doesn't
- Execution centers on manual and sequential atomic tests
- Uses an on-premises deployment model rather than paid SaaS plans
- Broader integrated platform capabilities are outside its narrow focus
Our verdict on Atomic Red Team
Atomic Red Team is an open-source library of focused, portable security tests mapped to the MITRE ATT&CK framework. It is designed for security teams that want to validate controls, measure detection coverage, and emulate adversary behaviors across Windows, Linux, macOS, and selected cloud environments. Tests are stored in structured YAML files and can be run manually or through the PowerShell-based Invoke-AtomicRedTeam execution framework. The project is free and open source rather than a conventional paid SaaS product.
Its strongest differentiator is the depth of its ATT&CK-mapped testing workflow. Teams can configure input arguments, install prerequisites, run cleanup commands, chain tests for sequential adversary emulation, and schedule recurring unattended execution. Remote test execution is also supported. The category specification covers Windows, Linux, macOS, cloud infrastructure, containers, SaaS, Azure AD, Google Workspace, Office 365, and IaaS providers, alongside custom scenarios and continuous scheduling.
Atomic Red Team fits teams that want a focused, adaptable way to exercise security controls without adopting a paid platform. Its manual command-line execution and sequential atomic-test model provide flexibility, but they also make it less suited to organizations seeking a broad integrated breach and attack simulation platform. Teams comfortable with an on-premises deployment model, structured test files, and execution frameworks should find the project aligned with ATT&CK-based validation. Organizations prioritizing a conventional hosted product should consider a different category fit.
Your product? Our editors can test Atomic Red Team in depth and publish a review, labelled as paid · from $149/mo →
Atomic Red Team pricing
Atomic Red Team fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Attack simulation modes | Not verified |
| Included attack surfaces | Windows, Linux, macOS, cloud infrastructure, containers, SaaS, Azure AD, Google Workspace, Office 365, and IaaS providers |
| MITRE ATT&CK mapping | Yes |
| Custom attack scenarios | Yes |
| Continuous scheduling | Yes |
| Deployment model | On-premises |
| Scenario library size | Not verified |
| Deployment | Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | atomicredteam.io |
| Facts checked | 20 Sep 2026 |
Alternatives to Atomic Red Team
- SafeBreach ValidateBroad, continuous BAS with custom attack creation and extensive security integrations.9.4
- Picus Security PlatformDeep, multi-surface validation for teams that need threat-library coverage.9.3
- Cymulate PlatformProduction-safe breach simulations validate controls across the full kill chain.9.2
See all Atomic Red Team alternatives →
Also Ranked In
Atomic Red Team is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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