# ctlogs.dev vs ONYPHE: side-by-side comparison (2026)

[ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Apps34](https://cybersectools.com/companies/apps34). [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

| | ctlogs.dev | ONYPHE |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | Verified | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup | SMB, Mid-Market, Enterprise |
| Company | Apps34 | – |
| Headquarters | – | – |

### Use cases and capabilities

| | ctlogs.dev | ONYPHE |
|---|---|---|
| Reconnaissance | Yes | – |
| OSINT | Yes | – |
| SSL | Yes | – |
| TLS | Yes | – |
| REST API | Yes | – |
| Cyber Threat Intelligence | Yes | – |
| DNS Security | Yes | Yes |
| Attack Detection | Yes | – |
| Subdomain Enumeration | Yes | – |
| Blue Team | – | Yes |

### Core features

**ctlogs.dev**

- Real-time Certificate Transparency Search
- Automated Subdomain Enumeration
- High-Performance REST JSON API
- Wildcard & Fingerprint Matching
- SSL/TLS Certificate History Tracking
- Attack Surface Mapping
- Historical Log Archiving
- Instant Domain & Issuer Filtering

**ONYPHE**

No features listed.

### Integrations

**ctlogs.dev**

- REST API
- cURL
- Python
- JSON
- Webhooks
- SIEM

**ONYPHE**

No integrations listed.

## Which one fits you

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

- [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) fits if you are a startup.
- [ONYPHE](https://cybersectools.com/tools/onyphe) fits if you are a small business or a mid-market company or an enterprise and you need a free product.

## ctlogs.dev vs ONYPHE FAQ

Common questions when comparing ctlogs.dev vs ONYPHE for external attack surface management.

### What is the difference between ctlogs.dev and ONYPHE?

**ctlogs.dev**: Fast Certificate Transparency search and JSON API for subdomain reconnaissance. Built by Apps34. Core capabilities include Real-time Certificate Transparency Search, Automated Subdomain Enumeration, High-Performance REST JSON API.

**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 ctlogs.dev a good alternative to ONYPHE?

Often, yes. ctlogs.dev and ONYPHE are both External Attack Surface Management products, and both cover DNS Security. Key differences: ctlogs.dev is Commercial while ONYPHE is Free. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [ctlogs.dev vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ctlogsdev-vs-ddactic-attack-surface-discovery)
- [ctlogs.dev vs SurfaceDiff](https://cybersectools.com/compare/ctlogsdev-vs-surfacediff)
- [ctlogs.dev vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-ctlogsdev)
- [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)
- [ONYPHE vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-onyphe)

## Alternatives to each

- [See all ctlogs.dev alternatives](https://cybersectools.com/alternatives/ctlogsdev)
- [See all ONYPHE alternatives](https://cybersectools.com/alternatives/onyphe)

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

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

More on ctlogs.dev 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