# censys-enumeration vs crt.sh: side-by-side comparison (2026)

[censys-enumeration](https://cybersectools.com/tools/censys-enumeration) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. [crt.sh](https://cybersectools.com/tools/crt-sh) 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

| | censys-enumeration | crt.sh |
|---|---|---|
| Pricing model | Free | Free |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 152 | – |
| Last commit | Jan 2019 | – |

### Use cases and capabilities

| | censys-enumeration | crt.sh |
|---|---|---|
| TLS | Yes | – |
| Enumeration | Yes | Yes |
| SSL | Yes | Yes |
| Reconnaissance | Yes | Yes |
| Subdomain Enumeration | Yes | Yes |
| Open Source | – | Yes |
| Bug Bounty | – | Yes |
| Network Reconnaissance | – | Yes |
| DNS Security | – | Yes |
| Security Scanning | – | Yes |

### Core features

**censys-enumeration**

No features listed.

**crt.sh**

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

### Integrations

**censys-enumeration**

No integrations listed.

**crt.sh**

1 integration 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.

- [censys-enumeration](https://cybersectools.com/tools/censys-enumeration) fits if you want a cloud product.
- [crt.sh](https://cybersectools.com/tools/crt-sh) fits if you need to run it on your own servers.

## censys-enumeration vs crt.sh FAQ

Common questions when comparing censys-enumeration vs crt.sh for external attack surface management.

### What is the difference between censys-enumeration and crt.sh?

**censys-enumeration**: A script to extract subdomains/emails for a given domain using SSL/TLS certificate dataset on Censys.

**crt.sh**: Bash script for subdomain enumeration via crt.sh certificate transparency logs.

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

### Who makes censys-enumeration and crt.sh?

**censys-enumeration** is open-source with 152 GitHub stars. **crt.sh** is open-source. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is censys-enumeration a good alternative to crt.sh?

Often, yes. censys-enumeration and crt.sh are both External Attack Surface Management products, and both cover Subdomain Enumeration, Reconnaissance, Enumeration. Key differences: censys-enumeration is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [censys-enumeration vs SurfaceDiff](https://cybersectools.com/compare/censys-enumeration-vs-surfacediff)
- [censys-enumeration vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-censys-enumeration)
- [censys-enumeration vs MGM Security Partners recon me](https://cybersectools.com/compare/censys-enumeration-vs-mgm-security-partners-recon-me)
- [crt.sh vs SurfaceDiff](https://cybersectools.com/compare/crt-sh-vs-surfacediff)
- [crt.sh vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-crt-sh)
- [crt.sh vs MGM Security Partners recon me](https://cybersectools.com/compare/crt-sh-vs-mgm-security-partners-recon-me)

## Alternatives to each

- [See all censys-enumeration alternatives](https://cybersectools.com/alternatives/censys-enumeration)
- [See all crt.sh alternatives](https://cybersectools.com/alternatives/crt-sh)

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Source: https://cybersectools.com/compare/crt-sh-vs-censys-enumeration

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

More on censys-enumeration and crt.sh: 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