# Nimbostratus vs Red Specter POLTERGEIST: side-by-side comparison (2026)

[Nimbostratus](https://cybersectools.com/tools/nimbostratus) is a free [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution. [Red Specter POLTERGEIST](https://cybersectools.com/tools/red-specter-poltergeist) is a commercial [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution by [Red Specter Security](https://cybersectools.com/companies/red-specter-security). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Nimbostratus | Red Specter POLTERGEIST |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Penetration Testing | Penetration Testing |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise |
| GitHub stars | 479 | – |
| Last commit | Feb 2014 | – |
| Company | – | Red Specter Security |
| Headquarters | – | – |

### Use cases and capabilities

| | Nimbostratus | Red Specter POLTERGEIST |
|---|---|---|
| Reconnaissance | Yes | – |
| AWS | Yes | – |
| Proof of Concept | Yes | – |
| Penetration Testing Framework | – | Yes |
| Web Security | – | Yes |
| DAST | – | Yes |
| OWASP | – | Yes |
| Red Team | – | Yes |
| XSS | – | Yes |
| SQL Injection | – | Yes |
| Evasion | – | Yes |
| WAF | – | Yes |
| CI/CD | – | Yes |

### Core features

**Nimbostratus**

No features listed.

**Red Specter POLTERGEIST**

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

### Integrations

**Nimbostratus**

No integrations listed.

**Red Specter POLTERGEIST**

10 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.

- [Nimbostratus](https://cybersectools.com/tools/nimbostratus) fits if you want a cloud product, you need a free product and you want an open-source product.
- [Red Specter POLTERGEIST](https://cybersectools.com/tools/red-specter-poltergeist) fits if you need to run it on your own servers.

## Nimbostratus vs Red Specter POLTERGEIST FAQ

Common questions when comparing Nimbostratus vs Red Specter POLTERGEIST for penetration testing.

### What is the difference between Nimbostratus and Red Specter POLTERGEIST?

**Nimbostratus**: A proof-of-concept toolkit for fingerprinting and exploiting Amazon Web Services cloud infrastructures using the boto library.

**Red Specter POLTERGEIST**: Autonomous web app pentest swarm with 10 agents and 55 attack vectors, built by Red Specter Security.

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

### Who makes Nimbostratus and Red Specter POLTERGEIST?

**Nimbostratus** is open-source with 479 GitHub stars. **Red Specter POLTERGEIST** is made by Red Specter Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Nimbostratus a good alternative to Red Specter POLTERGEIST?

Often, yes. Nimbostratus and Red Specter POLTERGEIST are both Penetration Testing products. Key differences: Nimbostratus is Free while Red Specter POLTERGEIST is Commercial, Nimbostratus is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Nimbostratus vs Strike Human-Led Pentesting](https://cybersectools.com/compare/nimbostratus-vs-strike-human-led-pentesting)
- [Nimbostratus vs ZeroThreat.ai](https://cybersectools.com/compare/nimbostratus-vs-zerothreatai)
- [Nimbostratus vs Webray RayBox](https://cybersectools.com/compare/nimbostratus-vs-webray-raybox)
- [Red Specter POLTERGEIST vs Strike Human-Led Pentesting](https://cybersectools.com/compare/red-specter-poltergeist-vs-strike-human-led-pentesting)
- [Red Specter POLTERGEIST vs ZeroThreat.ai](https://cybersectools.com/compare/red-specter-poltergeist-vs-zerothreatai)
- [Red Specter POLTERGEIST vs Webray RayBox](https://cybersectools.com/compare/red-specter-poltergeist-vs-webray-raybox)

## Alternatives to each

- [See all Nimbostratus alternatives](https://cybersectools.com/alternatives/nimbostratus)
- [See all Red Specter POLTERGEIST alternatives](https://cybersectools.com/alternatives/red-specter-poltergeist)

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Source: https://cybersectools.com/compare/nimbostratus-vs-red-specter-poltergeist

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

More on Nimbostratus and Red Specter POLTERGEIST: 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