# Amazon GuardDuty Tester vs Nemesis: side-by-side comparison (2026)

[Amazon GuardDuty Tester](https://cybersectools.com/tools/amazon-guardduty-tester) is a free [breach & attack simulation](https://cybersectools.com/categories/threat-simulation) solution. [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

| | Amazon GuardDuty Tester | Nemesis |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Breach & Attack Simulation | Breach & Attack Simulation |
| Verified | No | No |
| Deployment type | Cloud | Hybrid |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup |
| GitHub stars | 408 | – |
| Last commit | Mar 2025 | – |
| Company | – | Nemesis by Persistent Security |
| Headquarters | – | – |

### Use cases and capabilities

| | Amazon GuardDuty Tester | Nemesis |
|---|---|---|
| Kubernetes | Yes | – |
| AWS | Yes | – |
| Proof of Concept | Yes | – |
| Continuous Testing | – | Yes |

### Core features

**Amazon GuardDuty Tester**

No features listed.

**Nemesis**

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

### Integrations

**Amazon GuardDuty Tester**

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.

- [Amazon GuardDuty Tester](https://cybersectools.com/tools/amazon-guardduty-tester) fits if you want a cloud product, you are a small business or a mid-market company or an enterprise, you need a free product and you want an open-source product.
- [Nemesis](https://cybersectools.com/tools/nemesis) fits if you need both cloud and on-premises options.

## Amazon GuardDuty Tester vs Nemesis FAQ

Common questions when comparing Amazon GuardDuty Tester vs Nemesis for breach & attack simulation.

### What is the difference between Amazon GuardDuty Tester and Nemesis?

**Amazon GuardDuty Tester**: A collection of scripts and guidance for generating proof-of-concept Amazon GuardDuty findings to help users understand and test AWS security detection capabilities.

**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 Amazon GuardDuty Tester and Nemesis?

**Amazon GuardDuty Tester** is open-source with 408 GitHub stars. **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 Amazon GuardDuty Tester a good alternative to Nemesis?

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

## Related comparisons

- [Amazon GuardDuty Tester vs Picus Cloud Security Validation](https://cybersectools.com/compare/picus-cloud-security-validation-vs-amazon-guardduty-tester)
- [Amazon GuardDuty Tester vs AttackIQ Adversarial Exposure Validation](https://cybersectools.com/compare/amazon-guardduty-tester-vs-attackiq-adversarial-exposure-validation)
- [Amazon GuardDuty Tester vs Pentera Cloud Security](https://cybersectools.com/compare/amazon-guardduty-tester-vs-pentera-cloud-security)
- [Nemesis vs Picus Cloud Security Validation](https://cybersectools.com/compare/nemesis-vs-picus-cloud-security-validation)
- [Nemesis vs AttackIQ Adversarial Exposure Validation](https://cybersectools.com/compare/attackiq-adversarial-exposure-validation-vs-nemesis)
- [Nemesis vs Pentera Cloud Security](https://cybersectools.com/compare/nemesis-vs-pentera-cloud-security)

## Alternatives to each

- [See all Amazon GuardDuty Tester alternatives](https://cybersectools.com/alternatives/amazon-guardduty-tester)
- [See all Nemesis alternatives](https://cybersectools.com/alternatives/nemesis)

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Source: https://cybersectools.com/compare/amazon-guardduty-tester-vs-nemesis

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More on Amazon GuardDuty Tester 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