# crt.guru vs ONYPHE: 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). [ONYPHE](https://cybersectools.com/tools/onyphe) 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 | ONYPHE |
|---|---|---|
| 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 | SMB, Mid-Market, Enterprise |
| Company | Crt.guru | – |
| Headquarters | – | – |

### Use cases and capabilities

| | crt.guru | ONYPHE |
|---|---|---|
| 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 | – |
| DNS Security | – | Yes |
| Blue Team | – | Yes |

### Core features

**crt.guru**

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

**ONYPHE**

No features listed.

### Integrations

**crt.guru**

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

**ONYPHE**

No integrations listed.

## 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.
- [ONYPHE](https://cybersectools.com/tools/onyphe) fits if you need a free product.

## crt.guru vs ONYPHE FAQ

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

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

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

**ONYPHE**: ONYPHE is a cyber defense search engine that discovers exposed assets and provides real-time monitoring to identify vulnerabilities and potential risks.

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

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

Often, yes. crt.guru and ONYPHE are both External Attack Surface Management products. Key differences: crt.guru is Commercial while ONYPHE 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 DDactic Attack Surface Discovery](https://cybersectools.com/compare/crtguru-vs-ddactic-attack-surface-discovery)
- [crt.guru vs SurfaceDiff](https://cybersectools.com/compare/crtguru-vs-surfacediff)
- [ONYPHE vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-onyphe)
- [ONYPHE vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-onyphe)
- [ONYPHE vs SurfaceDiff](https://cybersectools.com/compare/onyphe-vs-surfacediff)

## Alternatives to each

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

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

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 ONYPHE: 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