# AppCheck SPA Scanner vs Source Defense How it works: 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). [Source Defense How it works](https://cybersectools.com/tools/source-defense-how-it-works) is a commercial [runtime application self-protection](https://cybersectools.com/categories/rasp) solution by [Source Defense](https://cybersectools.com/companies/source-defense). 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 | Source Defense How it works |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Dynamic Application Security Testing | Runtime Application Self-Protection |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | AppCheck | Source Defense |
| Headquarters | – | – |

### Use cases and capabilities

| | AppCheck SPA Scanner | Source Defense How it works |
|---|---|---|
| DAST | Yes | – |
| OWASP | Yes | – |
| Web Security | Yes | Yes |
| XSS | Yes | – |
| Sandbox | – | Yes |
| Browser Security | – | Yes |

### Core features

**AppCheck SPA Scanner**

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

**Source Defense How it works**

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

### Integrations

**AppCheck SPA Scanner**

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

**Source Defense How it works**

No integrations listed.

## AppCheck SPA Scanner vs Source Defense How it works FAQ

Common questions when comparing AppCheck SPA Scanner vs Source Defense How it works for dynamic application security testing.

### What is the difference between AppCheck SPA Scanner and Source Defense How it works?

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

**Source Defense How it works**: Client-side security for websites against 3rd party vendor attacks. Built by Source Defense.

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

### Who makes AppCheck SPA Scanner and Source Defense How it works?

**AppCheck SPA Scanner** is made by AppCheck. **Source Defense How it works** is made by Source Defense. 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 Source Defense How it works?

In part. AppCheck SPA Scanner and Source Defense How it works are not in the same category on CybersecTools. Both cover Web Security. 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)
- [Source Defense How it works vs Halo Security Application Scanning](https://cybersectools.com/compare/halo-security-application-scanning-vs-source-defense-how-it-works)
- [Source Defense How it works vs VulnSign Dynamic Application Security Testing](https://cybersectools.com/compare/source-defense-how-it-works-vs-vulnsign-dynamic-application-security-testing)
- [Source Defense How it works vs Tenable One Web App Scanning](https://cybersectools.com/compare/source-defense-how-it-works-vs-tenable-web-app-scanning)

## Alternatives to each

- [See all AppCheck SPA Scanner alternatives](https://cybersectools.com/alternatives/appcheck-spa-scanner)
- [See all Source Defense How it works alternatives](https://cybersectools.com/alternatives/source-defense-how-it-works)

---

Source: https://cybersectools.com/compare/appcheck-spa-scanner-vs-source-defense-how-it-works

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 Source Defense How it works: 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