# Source Defense How it works

Source Defense How it works is a Runtime Application Self-Protection product by Source Defense. It runs in the cloud. Pricing is commercial (contact sales).

Client-side security for websites against 3rd party vendor attacks

Listed February 2026.

## What is Source Defense How it works?

Source Defense is a client-side website security solution that protects against malicious activity originating from third-party vendors in the website supply chain. The platform addresses vulnerabilities introduced by integrated third-party JavaScript vendors that create unmanaged connections between vendor servers and client browsers.

The solution uses real-time sandbox isolation technology to prevent Magecart and Formjacking attacks. It applies automated and dynamic rules and policies using machine learning and industry best practices to control the access and permissions of all third-party tools operating on websites.

Source Defense is delivered as an agentless, SaaS-based solution that deploys by adding two lines of code to website page headers. The platform provides automatic and dynamic policy configuration without requiring manual intervention or administration.

The implementation process involves adding Source Defense code to the website HTML and selecting permission groups for third-party vendors. This approach allows organizations to maintain the business value from website supply chain vendors while preventing malicious data extraction or website alteration.

Tags: Web Security, Sandbox, Browser Security

## Where it fits in your security program (NIST CSF 2.0)

- [Govern](https://cybersectools.com/guides/building-govern-program-small-team): helps you set security rules, owners and oversight.
- [Protect](https://cybersectools.com/guides/building-protect-program-small-team): helps you prevent attacks and keep data safe.
- [Detect](https://cybersectools.com/guides/building-detect-program-small-team): helps you spot attacks and unusual activity.

## Quick facts

- Category: [Application Security](https://cybersectools.com/categories/application-security) · [Runtime Application Self-Protection](https://cybersectools.com/categories/rasp)
- Vendor: [Source Defense](https://cybersectools.com/companies/source-defense)
- Deployment: Cloud
- Company size fit: SMB, Mid-Market, Enterprise
- Pricing model: Commercial (contact sales)
- Features: 8 listed
- Website: sourcedefense.com

The full feature and integration lists are on the page for signed-in visitors.

## Where it ranks

No shortlist covers this product's category yet. The closest is [Best Application Security Solutions for Business](https://cybersectools.com/shortlists/best-application-security-solutions).

## Source Defense How it works FAQ

### What is Source Defense How it works?

Source Defense How it works is a product by Source Defense in the Runtime Application Self-Protection category. It covers Web Security, Sandbox and Browser Security.

### What is the pricing for Source Defense How it works?

Source Defense How it works is a commercial product. For pricing, visit https://sourcedefense.com/products/how-it-works/ or contact Source Defense.

### What are alternatives to Source Defense How it works?

Alternatives to Source Defense How it works listed on CybersecTools:

1. [c/side](https://cybersectools.com/tools/cside) - Client-side platform securing browser scripts, detecting fraud & ensuring PCI compliance. (Commercial)
2. [Approov Runtime Application Self Protection](https://cybersectools.com/tools/approov-protect-connected-car-apps) - RASP solution securing mobile apps and APIs across Android, iOS, and HarmonyOS at runtime. (Commercial)
3. [Jscrambler Webpage Integrity](https://cybersectools.com/tools/jscrambler-code-integrity) - Client-side platform for controlling third-party script behavior and preventing data (Commercial)
4. [Everspin EverSafe Web](https://cybersectools.com/tools/everspin-eversafe-web) - Real-time web service protection using AI-MTD (Moving Target Defense) tech. (Commercial)
5. [Raven Runtime Gatekeeper CI/CD Security](https://cybersectools.com/tools/raven-runtime-application-protection) - Use runtime application intelligence to stop dangerous builds before production. (Commercial)

Compare all Source Defense How it works alternatives at [https://cybersectools.com/alternatives/source-defense-how-it-works](https://cybersectools.com/alternatives/source-defense-how-it-works)

### What deployment and organization size does Source Defense How it works fit?

Source Defense How it works is available as cloud. It is listed for smb, mid-market and enterprise organizations. Pricing is commercial. Ask Source Defense for pricing and support terms.

## Compare Source Defense How it works with similar solutions

- [Source Defense How it works vs c/side](https://cybersectools.com/compare/source-defense-how-it-works-vs-cside)
- [Source Defense How it works vs Approov Runtime Application Self Protection](https://cybersectools.com/compare/approov-protect-connected-car-apps-vs-source-defense-how-it-works)
- [Source Defense How it works vs Jscrambler Webpage Integrity](https://cybersectools.com/compare/jscrambler-code-integrity-vs-source-defense-how-it-works)

All alternatives to Source Defense How it works: [/alternatives/source-defense-how-it-works](https://cybersectools.com/alternatives/source-defense-how-it-works)

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Source: https://cybersectools.com/tools/source-defense-how-it-works

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More on Source Defense How it works and Source Defense: 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=product-md