# Monarx Threat Shield vs Source Defense How it works: side-by-side comparison (2026)

[Monarx Threat Shield](https://cybersectools.com/tools/monarx-threat-shield) is a commercial [runtime application Self-Protection](https://cybersectools.com/categories/rasp) solution by [Monarx](https://cybersectools.com/companies/monarx). [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.

## Side-by-side comparison

| | Monarx Threat Shield | Source Defense How it works |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Runtime Application Self-Protection | Runtime Application Self-Protection |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | Monarx | Source Defense |
| Headquarters | – | – |

### Use cases and capabilities

| | Monarx Threat Shield | Source Defense How it works |
|---|---|---|
| WAF | Yes | – |
| SQL Injection | Yes | – |
| PHP | Yes | – |
| DDoS | Yes | – |
| Web Security | – | Yes |
| Sandbox | – | Yes |
| Browser Security | – | Yes |

### Core features

**Monarx Threat Shield**

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.

## Which one fits you

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

- [Monarx Threat Shield](https://cybersectools.com/tools/monarx-threat-shield) fits if you need to run it on your own servers and you are a startup.
- [Source Defense How it works](https://cybersectools.com/tools/source-defense-how-it-works) fits if you want a cloud product.

## Monarx Threat Shield vs Source Defense How it works FAQ

Common questions when comparing Monarx Threat Shield vs Source Defense How it works for runtime application Self-Protection.

### What is the difference between Monarx Threat Shield and Source Defense How it works?

**Monarx Threat Shield**: Real-time web application firewall with runtime protection for PHP apps, built by Monarx.

**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 Monarx Threat Shield and Source Defense How it works?

**Monarx Threat Shield** is made by Monarx. **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 Monarx Threat Shield a good alternative to Source Defense How it works?

Often, yes. Monarx Threat Shield and Source Defense How it works are both Runtime Application Self-Protection products. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Monarx Threat Shield vs Aikido Zen](https://cybersectools.com/compare/aikido-zen-vs-monarx-threat-shield)
- [Monarx Threat Shield vs c/side](https://cybersectools.com/compare/cside-vs-monarx-threat-shield)
- [Monarx Threat Shield vs Everspin EverSafe Web](https://cybersectools.com/compare/everspin-eversafe-web-vs-monarx-threat-shield)
- [Source Defense How it works vs Aikido Zen](https://cybersectools.com/compare/aikido-zen-vs-source-defense-how-it-works)
- [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 Everspin EverSafe Web](https://cybersectools.com/compare/everspin-eversafe-web-vs-source-defense-how-it-works)

## Alternatives to each

- [See all Monarx Threat Shield alternatives](https://cybersectools.com/alternatives/monarx-threat-shield)
- [See all Source Defense How it works alternatives](https://cybersectools.com/alternatives/source-defense-how-it-works)

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Source: https://cybersectools.com/compare/monarx-threat-shield-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/monarx-threat-shield.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Monarx Threat Shield 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