# ImmuniWeb® Continuous Penetration Testing vs RsaCtfTool: side-by-side comparison (2026)

[ImmuniWeb® Continuous Penetration Testing](https://cybersectools.com/tools/immuniwebr-continuous-penetration-testing) is a commercial [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution by [ImmuniWeb](https://cybersectools.com/companies/immuniweb). [RsaCtfTool](https://cybersectools.com/tools/rsactftool) is a free [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | ImmuniWeb® Continuous Penetration Testing | RsaCtfTool |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Penetration Testing | Penetration Testing |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB |
| GitHub stars | – | 6,830 |
| Last commit | – | Mar 2026 |
| Company | ImmuniWeb | – |
| Headquarters | – | – |

### Use cases and capabilities

| | ImmuniWeb® Continuous Penetration Testing | RsaCtfTool |
|---|---|---|
| Continuous Testing | Yes | – |
| Red Team | Yes | – |
| CTF | – | Yes |
| Education | – | Yes |

### Integrations

**ImmuniWeb® Continuous Penetration Testing**

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

**RsaCtfTool**

No integrations listed.

## Which one fits you

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

- [ImmuniWeb® Continuous Penetration Testing](https://cybersectools.com/tools/immuniwebr-continuous-penetration-testing) fits if you want a cloud product and you are a mid-market company or an enterprise.
- [RsaCtfTool](https://cybersectools.com/tools/rsactftool) fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.

## ImmuniWeb® Continuous Penetration Testing vs RsaCtfTool FAQ

Common questions when comparing ImmuniWeb® Continuous Penetration Testing vs RsaCtfTool for penetration testing.

### What is the difference between ImmuniWeb® Continuous Penetration Testing and RsaCtfTool?

**ImmuniWeb® Continuous Penetration Testing**: Continuous pentesting service monitoring web apps & APIs for code changes, built by ImmuniWeb.

**RsaCtfTool**: A utility that attempts to decrypt data from weak RSA public keys and recover private keys using multiple integer factorization algorithms.

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

### Who makes ImmuniWeb® Continuous Penetration Testing and RsaCtfTool?

**ImmuniWeb® Continuous Penetration Testing** is made by ImmuniWeb. **RsaCtfTool** is open-source with 6,830 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is ImmuniWeb® Continuous Penetration Testing a good alternative to RsaCtfTool?

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

## Related comparisons

- [ImmuniWeb® Continuous Penetration Testing vs NetSPI Platform](https://cybersectools.com/compare/immuniwebr-continuous-penetration-testing-vs-netspi-platform)
- [ImmuniWeb® Continuous Penetration Testing vs Strike PTaaS](https://cybersectools.com/compare/immuniwebr-continuous-penetration-testing-vs-strike-ptaas)
- [ImmuniWeb® Continuous Penetration Testing vs FireCompass AI-powered Pen Testing](https://cybersectools.com/compare/firecompass-ai-powered-pen-testing-vs-immuniwebr-continuous-penetration-testing)
- [RsaCtfTool vs NetSPI Platform](https://cybersectools.com/compare/netspi-platform-vs-rsactftool)
- [RsaCtfTool vs Strike PTaaS](https://cybersectools.com/compare/rsactftool-vs-strike-ptaas)
- [RsaCtfTool vs FireCompass AI-powered Pen Testing](https://cybersectools.com/compare/firecompass-ai-powered-pen-testing-vs-rsactftool)

## Alternatives to each

- [See all ImmuniWeb® Continuous Penetration Testing alternatives](https://cybersectools.com/alternatives/immuniwebr-continuous-penetration-testing)
- [See all RsaCtfTool alternatives](https://cybersectools.com/alternatives/rsactftool)

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Source: https://cybersectools.com/compare/immuniwebr-continuous-penetration-testing-vs-rsactftool

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

More on ImmuniWeb® Continuous Penetration Testing and RsaCtfTool: 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