Features, pricing, ratings, and pros and cons, compared head to head.
Act Free Assessment is a free breach & attack simulation tool by Act. SentinelTestbed is a free cyber range training tool. Compare features, ratings, integrations, and community reviews side by side to find the best breach & attack simulation fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
Based on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Security teams building or validating detection rules for Microsoft Sentinel should use SentinelTestbed to safely test configurations against realistic attack patterns without risking production data. The free price point and GitHub availability mean you can spin up a dedicated lab environment in minutes, letting analysts confirm detections work before deployment. Skip this if you need a polished SaaS offering or multi-tool integration; SentinelTestbed is deliberately minimal, built for hands-on testing rather than operational monitoring.
Free read-only cloud attack path simulation covering 5 real attack scenarios.
A vulnerable web site for testing Sentinel features
Access NIST CSF 2.0 data from thousands of security products via MCP to assess your stack coverage.
Access via MCPNo reviews yet
No reviews yet
Explore more tools in this category or create a security stack with your selections.
Common questions about comparing Act Free Assessment vs SentinelTestbed for your breach & attack simulation needs.
Act Free Assessment: Free read-only cloud attack path simulation covering 5 real attack scenarios. built by Act. Core capabilities include Read-only, agentless attack simulation deployed in under 5 minutes, 5 real attack scenarios validated in the customer's live environment, Step-by-step access chain visualization from entry points to production data..
SentinelTestbed: A vulnerable web site for testing Sentinel features..
Both serve the Breach & Attack Simulation market but differ in approach, feature depth, and target audience.
Act Free Assessment and SentinelTestbed serve similar Breach & Attack Simulation use cases. Key differences: SentinelTestbed is open-source. Review the feature comparison above to determine which fits your requirements.
Get strategic cybersecurity insights in your inbox