# Grendel-Scan vs RoboShadow OWASP ZAP Vulnerability Scanner: side-by-side comparison (2026)

[Grendel-Scan](https://cybersectools.com/tools/grendel-scan) is a free [security scanning](https://cybersectools.com/categories/security-scanning) solution. [RoboShadow OWASP ZAP Vulnerability Scanner](https://cybersectools.com/tools/roboshadow-owasp-zap-vulnerability-scanner) is a commercial [security scanning](https://cybersectools.com/categories/security-scanning) solution by [RoboShadow](https://cybersectools.com/companies/roboshadow). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Grendel-Scan | RoboShadow OWASP ZAP Vulnerability Scanner |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Security Scanning | Security Scanning |
| Verified | No | No |
| Deployment type | On-Premises | Hybrid |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | – | RoboShadow |
| Headquarters | – | – |

### Use cases and capabilities

| | Grendel-Scan | RoboShadow OWASP ZAP Vulnerability Scanner |
|---|---|---|
| Web Security | Yes | – |
| Network Scanning | – | Yes |
| Patch Management | – | Yes |
| XSS | – | Yes |

### Core features

**Grendel-Scan**

No features listed.

**RoboShadow OWASP ZAP Vulnerability Scanner**

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

### Integrations

**Grendel-Scan**

No integrations listed.

**RoboShadow OWASP ZAP Vulnerability Scanner**

11 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.

- [Grendel-Scan](https://cybersectools.com/tools/grendel-scan) fits if you need to run it on your own servers, you are a startup and you need a free product.
- [RoboShadow OWASP ZAP Vulnerability Scanner](https://cybersectools.com/tools/roboshadow-owasp-zap-vulnerability-scanner) fits if you need both cloud and on-premises options.

## Grendel-Scan vs RoboShadow OWASP ZAP Vulnerability Scanner FAQ

Common questions when comparing Grendel-Scan vs RoboShadow OWASP ZAP Vulnerability Scanner for security scanning.

### What is the difference between Grendel-Scan and RoboShadow OWASP ZAP Vulnerability Scanner?

**Grendel-Scan**: A tool for automated security scanning of web applications and manual penetration testing.

**RoboShadow OWASP ZAP Vulnerability Scanner**: Web app & network vulnerability scanner integrating OWASP ZAP, Shodan & Nmap, built by RoboShadow.

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

### Is Grendel-Scan a good alternative to RoboShadow OWASP ZAP Vulnerability Scanner?

Often, yes. Grendel-Scan and RoboShadow OWASP ZAP Vulnerability Scanner are both Security Scanning products. Key differences: Grendel-Scan is Free while RoboShadow OWASP ZAP Vulnerability Scanner is Commercial. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Grendel-Scan vs Jsmon 2.0](https://cybersectools.com/compare/grendel-scan-vs-jsmon-20)
- [Grendel-Scan vs CyberChecker](https://cybersectools.com/compare/cyberchecker-vs-grendel-scan)
- [Grendel-Scan vs Intruder XSS Scanner](https://cybersectools.com/compare/grendel-scan-vs-intruder-xss-scanner)
- [RoboShadow OWASP ZAP Vulnerability Scanner vs Jsmon 2.0](https://cybersectools.com/compare/jsmon-20-vs-roboshadow-owasp-zap-vulnerability-scanner)
- [RoboShadow OWASP ZAP Vulnerability Scanner vs CyberChecker](https://cybersectools.com/compare/cyberchecker-vs-roboshadow-owasp-zap-vulnerability-scanner)
- [RoboShadow OWASP ZAP Vulnerability Scanner vs Intruder XSS Scanner](https://cybersectools.com/compare/intruder-xss-scanner-vs-roboshadow-owasp-zap-vulnerability-scanner)

## Alternatives to each

- [See all Grendel-Scan alternatives](https://cybersectools.com/alternatives/grendel-scan)
- [See all RoboShadow OWASP ZAP Vulnerability Scanner alternatives](https://cybersectools.com/alternatives/roboshadow-owasp-zap-vulnerability-scanner)

---

Source: https://cybersectools.com/compare/grendel-scan-vs-roboshadow-owasp-zap-vulnerability-scanner

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

More on Grendel-Scan and RoboShadow OWASP ZAP Vulnerability Scanner: 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