APT Simulator vs Dorothy: 2026 Comparison
APT Simulator is a free threat simulation tool. Dorothy is a free threat simulation tool. Compare features, ratings, integrations, and community reviews side by side to find the best threat simulation fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Security teams building Windows incident response playbooks need APT Simulator to safely replicate adversary behavior on non-production systems without risk of lateral movement or data exfiltration. The tool's 2,700-plus GitHub stars reflect active use among blue teams validating detection logic against realistic post-compromise scenarios. Skip this if your primary need is testing EDR or XDR detection tuning across multiple operating systems; APT Simulator's Windows-only scope and simulation-focused design make it a lab tool, not a platform for enterprise-wide threat validation.
Okta security teams with detection gaps in their SIEM or XDR will find Dorothy's value in its free, attack-path testing that mirrors actual threat behavior instead of generic scanning. The MITRE ATT&CK mapping ensures your detection rules are validated against tactics adversaries actually use, not checkbox compliance. Skip Dorothy if you need continuous monitoring or remediation automation; it's a point-in-time validation tool, not a runtime detection layer.
Data verified Apr 2026
