# DOMPurify vs Monarx Threat Shield: side-by-side comparison (2026)

[DOMPurify](https://cybersectools.com/tools/dompurify) is a free [runtime application self-protection](https://cybersectools.com/categories/rasp) solution. [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). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | DOMPurify | Monarx Threat Shield |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Runtime Application Self-Protection | Runtime Application Self-Protection |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 16,746 | – |
| Last commit | Mar 2026 | – |
| Company | – | Monarx |
| Headquarters | – | – |

### Use cases and capabilities

| | DOMPurify | Monarx Threat Shield |
|---|---|---|
| Node.js | Yes | – |
| XSS | Yes | – |
| WAF | – | Yes |
| SQL Injection | – | Yes |
| PHP | – | Yes |
| DDoS | – | Yes |

### Core features

**DOMPurify**

No features listed.

**Monarx Threat Shield**

10 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.

- [DOMPurify](https://cybersectools.com/tools/dompurify) fits if you want a cloud product, you need a free product and you want an open-source product.
- [Monarx Threat Shield](https://cybersectools.com/tools/monarx-threat-shield) fits if you need to run it on your own servers.

## DOMPurify vs Monarx Threat Shield FAQ

Common questions when comparing DOMPurify vs Monarx Threat Shield for runtime application self-protection.

### What is the difference between DOMPurify and Monarx Threat Shield?

**DOMPurify**: DOMPurify is a fast XSS sanitizer for HTML, MathML, and SVG.

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

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

### Who makes DOMPurify and Monarx Threat Shield?

**DOMPurify** is open-source with 16,746 GitHub stars. **Monarx Threat Shield** is made by Monarx. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is DOMPurify a good alternative to Monarx Threat Shield?

Often, yes. DOMPurify and Monarx Threat Shield are both Runtime Application Self-Protection products. Key differences: DOMPurify is Free while Monarx Threat Shield is Commercial, DOMPurify is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [DOMPurify vs Aikido Zen](https://cybersectools.com/compare/aikido-zen-vs-dompurify)
- [DOMPurify vs Arcjet](https://cybersectools.com/compare/arcjet-vs-dompurify)
- [DOMPurify vs Everspin EverSafe Web](https://cybersectools.com/compare/dompurify-vs-everspin-eversafe-web)
- [Monarx Threat Shield vs Aikido Zen](https://cybersectools.com/compare/aikido-zen-vs-monarx-threat-shield)
- [Monarx Threat Shield vs Arcjet](https://cybersectools.com/compare/arcjet-vs-monarx-threat-shield)
- [Monarx Threat Shield vs Everspin EverSafe Web](https://cybersectools.com/compare/everspin-eversafe-web-vs-monarx-threat-shield)

## Alternatives to each

- [See all DOMPurify alternatives](https://cybersectools.com/alternatives/dompurify)
- [See all Monarx Threat Shield alternatives](https://cybersectools.com/alternatives/monarx-threat-shield)

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Source: https://cybersectools.com/compare/dompurify-vs-monarx-threat-shield

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

More on DOMPurify and Monarx Threat Shield: 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