# crt.guru vs Intruder Discover Attack Surface: 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). [Intruder Discover Attack Surface](https://cybersectools.com/tools/intruder-discover-attack-surface) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Intruder](https://cybersectools.com/companies/intruder). 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 | Intruder Discover Attack Surface |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | Crt.guru | Intruder |
| Headquarters | – | – |

### Use cases and capabilities

| | crt.guru | Intruder Discover Attack Surface |
|---|---|---|
| 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 | – |
| Misconfiguration | – | Yes |
| Subdomain Enumeration | – | Yes |

### Core features

**crt.guru**

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

**Intruder Discover Attack Surface**

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

### Integrations

**crt.guru**

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

**Intruder Discover Attack Surface**

4 integrations 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.

- [crt.guru](https://cybersectools.com/tools/crtguru) fits if you are a startup.

## crt.guru vs Intruder Discover Attack Surface FAQ

Common questions when comparing crt.guru vs Intruder Discover Attack Surface for external attack surface management.

### What is the difference between crt.guru and Intruder Discover Attack Surface?

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

**Intruder Discover Attack Surface**: Attack surface management platform for discovering and securing exposed assets, built by Intruder.

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

### Who makes crt.guru and Intruder Discover Attack Surface?

**crt.guru** is made by Crt.guru. **Intruder Discover Attack Surface** is made by Intruder. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is crt.guru a good alternative to Intruder Discover Attack Surface?

Often, yes. crt.guru and Intruder Discover Attack Surface are both External Attack Surface Management products. 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)
- [Intruder Discover Attack Surface vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-intruder-discover-attack-surface)
- [Intruder Discover Attack Surface vs SurfaceDiff](https://cybersectools.com/compare/intruder-discover-attack-surface-vs-surfacediff)
- [Intruder Discover Attack Surface vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-intruder-discover-attack-surface)

## Alternatives to each

- [See all crt.guru alternatives](https://cybersectools.com/alternatives/crtguru)
- [See all Intruder Discover Attack Surface alternatives](https://cybersectools.com/alternatives/intruder-discover-attack-surface)

---

Source: https://cybersectools.com/compare/crtguru-vs-intruder-discover-attack-surface

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 Intruder Discover Attack Surface: 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