# ctlogs.dev vs Sudomy: 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). [Sudomy](https://cybersectools.com/tools/sudomy) 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 | Sudomy |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | Verified | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | – | 2,241 |
| Last commit | – | Feb 2024 |
| Company | Apps34 | – |
| Headquarters | – | – |

### Use cases and capabilities

| | ctlogs.dev | Sudomy |
|---|---|---|
| Reconnaissance | Yes | – |
| OSINT | Yes | – |
| SSL | Yes | – |
| TLS | Yes | – |
| REST API | Yes | – |
| Cyber Threat Intelligence | Yes | – |
| DNS Security | Yes | – |
| Attack Detection | Yes | – |
| Subdomain Enumeration | Yes | Yes |
| Bug Bounty | – | Yes |
| Security Research | – | 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

**Sudomy**

No features listed.

### Integrations

**ctlogs.dev**

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

**Sudomy**

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 want a cloud product.
- [Sudomy](https://cybersectools.com/tools/sudomy) fits if you need to run it on your own servers, you are a small business or a mid-market company or an enterprise, you need a free product and you want an open-source product.

## ctlogs.dev vs Sudomy FAQ

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

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

**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.

**Sudomy**: A subdomain enumeration tool for bug hunting and pentesting.

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

### Who makes ctlogs.dev and Sudomy?

**ctlogs.dev** is made by Apps34. **Sudomy** is open-source with 2,241 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is ctlogs.dev a good alternative to Sudomy?

Often, yes. ctlogs.dev and Sudomy are both External Attack Surface Management products, and both cover Subdomain Enumeration. Key differences: ctlogs.dev is Commercial while Sudomy is Free, Sudomy is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [ctlogs.dev vs MGM Security Partners recon me](https://cybersectools.com/compare/ctlogsdev-vs-mgm-security-partners-recon-me)
- [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)
- [Sudomy vs MGM Security Partners recon me](https://cybersectools.com/compare/mgm-security-partners-recon-me-vs-sudomy)
- [Sudomy vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-sudomy)
- [Sudomy vs SurfaceDiff](https://cybersectools.com/compare/sudomy-vs-surfacediff)

## Alternatives to each

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

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

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 Sudomy: 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