Features, pricing, ratings, and pros and cons, compared head to head.
Act Free Assessment is a free breach & attack simulation tool by Act. Synack Attack Surface Discovery is a commercial external attack surface management tool by Synack. 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:
Synack Attack Surface Discovery
Mid-market and enterprise security teams managing sprawling external attack surfaces will get the most from Synack Attack Surface Discovery because it actually finds assets you don't know you own through continuous passive scanning of domains, IP ranges, and subsidiaries. The tool covers four NIST CSF 2.0 functions including ID.AM asset management and DE.CM continuous monitoring, which means you're building real inventory rigor, not just running occasional scans. Skip this if your organization lacks the ops maturity to act on discovered assets quickly; Synack surfaces the problem faster than most teams can remediate it.
Free read-only cloud attack path simulation covering 5 real attack scenarios.
External attack surface mgmt with asset discovery and on-demand pentesting
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Common questions about comparing Act Free Assessment vs Synack Attack Surface Discovery 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..
Synack Attack Surface Discovery: External attack surface mgmt with asset discovery and on-demand pentesting. built by Synack. Core capabilities include Self-service asset discovery for domains and IPv4 hosts, Continuous discovery engine for web, IP, and FQDN assets, Centralized asset dashboard with bulk confirmation/rejection..
Both serve the Breach & Attack Simulation market but differ in approach, feature depth, and target audience.
Act Free Assessment differentiates with 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. Synack Attack Surface Discovery differentiates with Self-service asset discovery for domains and IPv4 hosts, Continuous discovery engine for web, IP, and FQDN assets, Centralized asset dashboard with bulk confirmation/rejection.
Act Free Assessment is developed by Act. Synack Attack Surface Discovery is developed by Synack. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Act Free Assessment and Synack Attack Surface Discovery serve similar Breach & Attack Simulation use cases. Key differences: Act Free Assessment is Free while Synack Attack Surface Discovery is Commercial. Review the feature comparison above to determine which fits your requirements.
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