# crt.guru vs PublicWWW: side-by-side comparison (2026)

[crt.guru](https://cybersectools.com/tools/crtguru) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Crt.guru](https://cybersectools.com/companies/crtguru). [PublicWWW](https://cybersectools.com/tools/publicwww) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions) picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Mandiant Attack Surface Management and 4 more.

## Side-by-side comparison

| | crt.guru | PublicWWW |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Crt.guru | – |
| Headquarters | – | – |

### Use cases and capabilities

| | crt.guru | PublicWWW |
|---|---|---|
| TLS | Yes | – |
| SSL | Yes | – |
| PCI DSS | Yes | – |
| NIST | Yes | – |
| Security Scanning | Yes | – |
| Alerting | Yes | – |
| Security Compliance Training | Yes | – |
| Security Reporting | Yes | – |
| Vulnerability | Yes | – |
| REST API | Yes | – |
| Reconnaissance | – | Yes |

### Core features

**crt.guru**

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

**PublicWWW**

No features listed.

### Integrations

**crt.guru**

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

**PublicWWW**

No integrations listed.

## Which one fits you

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

- [PublicWWW](https://cybersectools.com/tools/publicwww) fits if you need a free product.

## crt.guru vs PublicWWW FAQ

Common questions when comparing crt.guru vs PublicWWW for external attack surface management.

### What is the difference between crt.guru and PublicWWW?

**crt.guru**: External TLS cert monitoring with expiry alerts, vuln scanning & compliance reports. Built by Crt.guru.

**PublicWWW**: A source code search engine for searching alphanumeric snippets, signatures, or keywords in web page HTML, JS, and CSS code.

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

### Is crt.guru a good alternative to PublicWWW?

Often, yes. crt.guru and PublicWWW are both External Attack Surface Management products. Key differences: crt.guru is Commercial while PublicWWW is Free. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [crt.guru vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-crtguru)
- [crt.guru vs SurfaceDiff](https://cybersectools.com/compare/crtguru-vs-surfacediff)
- [crt.guru vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/crtguru-vs-ddactic-attack-surface-discovery)
- [PublicWWW vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-publicwww)
- [PublicWWW vs SurfaceDiff](https://cybersectools.com/compare/publicwww-vs-surfacediff)
- [PublicWWW vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-publicwww)

## Alternatives to each

- [See all crt.guru alternatives](https://cybersectools.com/alternatives/crtguru)
- [See all PublicWWW alternatives](https://cybersectools.com/alternatives/publicwww)

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Source: https://cybersectools.com/compare/crtguru-vs-publicwww

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

More on crt.guru and PublicWWW: 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