# AppCheck SPA Scanner vs xssValidator: side-by-side comparison (2026)

[AppCheck SPA Scanner](https://cybersectools.com/tools/appcheck-spa-scanner) is a commercial [dynamic application security testing](https://cybersectools.com/categories/dast) solution by [AppCheck](https://cybersectools.com/companies/appcheck). [xssValidator](https://cybersectools.com/tools/xssvalidator) is a free [dynamic application security testing](https://cybersectools.com/categories/dast) solution. Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best DAST Solutions for Business](https://cybersectools.com/shortlists/best-dast-solutions) picks PortSwigger Burp Suite DAST, Invicti DAST, Rapid7 InsightAppSec and 4 more.

## Side-by-side comparison

| | AppCheck SPA Scanner | xssValidator |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Dynamic Application Security Testing | Dynamic Application Security Testing |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | – | 416 |
| Last commit | – | Feb 2022 |
| Company | AppCheck | – |
| Headquarters | – | – |

### Use cases and capabilities

| | AppCheck SPA Scanner | xssValidator |
|---|---|---|
| DAST | Yes | – |
| OWASP | Yes | – |
| Web Security | Yes | – |
| XSS | Yes | Yes |
| Payload Generation | – | Yes |

### Core features

**AppCheck SPA Scanner**

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

**xssValidator**

No features listed.

### Integrations

**AppCheck SPA Scanner**

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

**xssValidator**

No integrations listed.

## Which one fits you

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

- [AppCheck SPA Scanner](https://cybersectools.com/tools/appcheck-spa-scanner) fits if you want a cloud product.
- [xssValidator](https://cybersectools.com/tools/xssvalidator) 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.

## AppCheck SPA Scanner vs xssValidator FAQ

Common questions when comparing AppCheck SPA Scanner vs xssValidator for dynamic application security testing.

### What is the difference between AppCheck SPA Scanner and xssValidator?

**AppCheck SPA Scanner**: DAST scanner for Single Page Applications using headless browser technology, built by AppCheck.

**xssValidator**: A Burp Suite extension that automates XSS vulnerability detection and validation through custom payload generation and response analysis.

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

### Who makes AppCheck SPA Scanner and xssValidator?

**AppCheck SPA Scanner** is made by AppCheck. **xssValidator** is open-source with 416 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is AppCheck SPA Scanner a good alternative to xssValidator?

Often, yes. AppCheck SPA Scanner and xssValidator are both Dynamic Application Security Testing products, and both cover XSS. Key differences: AppCheck SPA Scanner is Commercial while xssValidator is Free, xssValidator is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [AppCheck SPA Scanner vs Halo Security Application Scanning](https://cybersectools.com/compare/appcheck-spa-scanner-vs-halo-security-application-scanning)
- [AppCheck SPA Scanner vs VulnSign Dynamic Application Security Testing](https://cybersectools.com/compare/appcheck-spa-scanner-vs-vulnsign-dynamic-application-security-testing)
- [AppCheck SPA Scanner vs Tenable One Web App Scanning](https://cybersectools.com/compare/appcheck-spa-scanner-vs-tenable-web-app-scanning)
- [xssValidator vs Halo Security Application Scanning](https://cybersectools.com/compare/halo-security-application-scanning-vs-xssvalidator)
- [xssValidator vs VulnSign Dynamic Application Security Testing](https://cybersectools.com/compare/vulnsign-dynamic-application-security-testing-vs-xssvalidator)
- [xssValidator vs Tenable One Web App Scanning](https://cybersectools.com/compare/tenable-web-app-scanning-vs-xssvalidator)

## Alternatives to each

- [See all AppCheck SPA Scanner alternatives](https://cybersectools.com/alternatives/appcheck-spa-scanner)
- [See all xssValidator alternatives](https://cybersectools.com/alternatives/xssvalidator)

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Source: https://cybersectools.com/compare/appcheck-spa-scanner-vs-xssvalidator

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

More on AppCheck SPA Scanner and xssValidator: 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