# Keysight CyPerf vs Nemesis: side-by-side comparison (2026)

[Keysight CyPerf](https://cybersectools.com/tools/keysight-cyperf) is a free [breach & attack simulation](https://cybersectools.com/categories/threat-simulation) solution by [Keysight Technologies](https://cybersectools.com/companies/keysight-technologies). [Nemesis](https://cybersectools.com/tools/nemesis) is a commercial [breach & attack simulation](https://cybersectools.com/categories/threat-simulation) solution by [Nemesis by Persistent Security](https://cybersectools.com/companies/nemesis-by-persistent-security). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Keysight CyPerf | Nemesis |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Breach & Attack Simulation | Breach & Attack Simulation |
| Verified | No | No |
| Deployment type | Cloud | Hybrid |
| Company size fit | Mid-Market, Enterprise | Startup |
| Company | Keysight Technologies | Nemesis by Persistent Security |
| Headquarters | – | – |

### Use cases and capabilities

| | Keysight CyPerf | Nemesis |
|---|---|---|
| Network Testing | Yes | – |
| Fuzzing | Yes | – |
| Zero Trust Architecture | Yes | – |
| Continuous Testing | – | Yes |

### Core features

**Keysight CyPerf**

4 features listed. Sign in on the page to see them.

**Nemesis**

7 features listed. Sign in on the page to see them.

### Integrations

**Keysight CyPerf**

No integrations listed.

**Nemesis**

3 integrations listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [Keysight CyPerf](https://cybersectools.com/tools/keysight-cyperf) fits if you want a cloud product, you are a mid-market company or an enterprise and you need a free product.
- [Nemesis](https://cybersectools.com/tools/nemesis) fits if you need both cloud and on-premises options and you are a startup.

## Keysight CyPerf vs Nemesis FAQ

Common questions when comparing Keysight CyPerf vs Nemesis for breach & attack simulation.

### What is the difference between Keysight CyPerf and Nemesis?

**Keysight CyPerf**: Cloud-native test for application experience, security efficacy, and performance. Built by Keysight Technologies.

**Nemesis**: AI Breach and Attack Simulation that adapts to your defences. Built by Nemesis by Persistent Security.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes Keysight CyPerf and Nemesis?

**Keysight CyPerf** is made by Keysight Technologies. **Nemesis** is made 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?

Often, yes. Keysight CyPerf and Nemesis are both Breach & Attack Simulation products. Key differences: Keysight CyPerf is Free while Nemesis is Commercial. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Keysight CyPerf vs Keysight Security Attack Emulation](https://cybersectools.com/compare/keysight-cyperf-vs-keysight-security-attack-emulation)
- [Keysight CyPerf vs Obsidio DDoS Simulation Platform](https://cybersectools.com/compare/keysight-cyperf-vs-obsidio-ddos-simulation-platform)
- [Keysight CyPerf vs AttackIQ Adversarial Exposure Validation](https://cybersectools.com/compare/attackiq-adversarial-exposure-validation-vs-keysight-cyperf)
- [Nemesis vs Keysight Security Attack Emulation](https://cybersectools.com/compare/keysight-security-attack-emulation-vs-nemesis)
- [Nemesis vs Obsidio DDoS Simulation Platform](https://cybersectools.com/compare/nemesis-vs-obsidio-ddos-simulation-platform)
- [Nemesis vs AttackIQ Adversarial Exposure Validation](https://cybersectools.com/compare/attackiq-adversarial-exposure-validation-vs-nemesis)

## Alternatives to each

- [See all Keysight CyPerf alternatives](https://cybersectools.com/alternatives/keysight-cyperf)
- [See all Nemesis alternatives](https://cybersectools.com/alternatives/nemesis)

---

Source: https://cybersectools.com/compare/keysight-cyperf-vs-nemesis

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/keysight-cyperf.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Keysight CyPerf and Nemesis: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md