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Metasploitable3 is a free cyber range training tool. SimSpace Attack Catalog is a commercial cyber range training tool by SimSpace. Compare features, ratings, integrations, and community reviews side by side to find the best cyber range training fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Security teams building internal cyber ranges or red team labs should choose Metasploitable3 for its deliberately vulnerable attack surface and tight integration with Metasploit Framework, eliminating the setup friction of hunting for compatible targets. The 5,470 GitHub stars reflect sustained adoption by practitioners, and the free price point means you can spin up isolated instances for each training cohort without budget negotiation. Skip this if you need a modern Windows environment or current OS versions; Metasploitable3's older stack is the feature, not the bug, but it won't teach your team anything about patching contemporary vulnerabilities.
Security teams building incident response muscle memory without waiting for real breaches should use SimSpace Attack Catalog; the scenario library covers APT tradecraft and custom threat actor campaigns that let you validate detection and response at scale before an actual incident forces the test. The tool maps directly to NIST CSF 2.0's Awareness and Training function, with complexity ratings and estimated attack timelines that let you ladder difficulty from junior analyst to purple team exercises. Skip this if you need offensive security testing or red team automation; SimSpace is purely defensive training and validation, not a pentest substitute.
A virtual machine with numerous security vulnerabilities for testing exploits with Metasploit.
Catalog of simulated attack scenarios for cyber defense training and validation
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Common questions about comparing Metasploitable3 vs SimSpace Attack Catalog for your cyber range training needs.
Metasploitable3: A virtual machine with numerous security vulnerabilities for testing exploits with Metasploit..
SimSpace Attack Catalog: Catalog of simulated attack scenarios for cyber defense training and validation. built by SimSpace. headquartered in United States. Core capabilities include Attack scenario catalog with APT and custom simulations, Detailed TTP documentation for each scenario, Complexity level ratings for attack scenarios..
Both serve the Cyber Range Training market but differ in approach, feature depth, and target audience.
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