Who makes Keysight CyPerf and Nemesis?

**Keysight CyPerf** is developed by Keysight Technologies. **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.

Is Keysight CyPerf a good alternative to Nemesis?

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.

Keysight CyPerf vs Nemesis: Features, Integrations, Reviews (2026) | CybersecTools

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

Features, pricing, ratings, and pros and cons, compared head to head.

Keysight CyPerf is a free breach & attack simulation tool by Keysight Technologies. Nemesis is a commercial breach & attack simulation tool by Nemesis by Persistent Security. 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.