Keysight CyPerf vs Nemesis: Side-by-Side Comparison (2026)

Keysight CyPerf: Cloud-native test for application experience, security efficacy, and performance. built by Keysight Technologies. Core capabilities include Cloud-native, agent-based test fabric, Realistic application and attack traffic, Validates SASE, ZTNA, and firewall efficacy..

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.

Keysight CyPerf differentiates with Cloud-native, agent-based test fabric, Realistic application and attack traffic, Validates SASE, ZTNA, and firewall efficacy. Nemesis differentiates with Continuous breach and attack simulation, MITRE ATT&CK technique mapping, Security control validation.

Keysight CyPerf is developed by Keysight Technologies. Nemesis is developed by Nemesis by Persistent Security founded in 2022-01-01T00:00:00.000Z. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

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