Act Free Assessment vs Nemesis: Side-by-Side Comparison (2026)

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..

Nemesis: AI Breach and Attack Simulation that adapts to your defences. built by Nemesis by Persistent Security. Core capabilities include Continuous breach and attack simulation, MITRE ATT&CK technique mapping, Security control validation..

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. Nemesis differentiates with Continuous breach and attack simulation, MITRE ATT&CK technique mapping, Security control validation.

Act Free Assessment is developed by Act. Nemesis is developed by Nemesis by Persistent Security founded in 2022-01-01T00:00:00.000Z. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Act Free Assessment and Nemesis serve similar Breach & Attack Simulation use cases: both are Breach & Attack Simulation tools. Key differences: Act Free Assessment is Free while Nemesis is Commercial. Review the feature comparison above to determine which fits your requirements.