# DDactic Attack Surface Discovery vs massdns: side-by-side comparison (2026)

[DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [DDactic](https://cybersectools.com/companies/ddactic). [massdns](https://cybersectools.com/tools/massdns) 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, Google Mandiant Attack Surface Management and 4 more.

## Side-by-side comparison

| | DDactic Attack Surface Discovery | massdns |
|---|---|---|
| Pricing model | Commercial | 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 | – | 3,417 |
| Last commit | – | Jul 2025 |
| Company | DDactic | – |
| Headquarters | – | – |

### Use cases and capabilities

| | DDactic Attack Surface Discovery | massdns |
|---|---|---|
| Subdomain Enumeration | Yes | Yes |
| Vulnerability | Yes | – |
| DDoS | Yes | – |
| DNS Security | Yes | – |
| Network Scanning | Yes | – |
| Security Scanning | Yes | – |
| Port Scanning | Yes | – |
| SSL | Yes | – |
| Data Breach | Yes | – |
| Reconnaissance | Yes | Yes |
| Security Tools | – | Yes |

### Core features

**DDactic Attack Surface Discovery**

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

**massdns**

No features listed.

### Integrations

**DDactic Attack Surface Discovery**

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

**massdns**

No integrations listed.

## Which one fits you

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

- [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) fits if you want a cloud product.
- [massdns](https://cybersectools.com/tools/massdns) fits if you need to run it on your own servers, you need a free product and you want an open-source product.

## DDactic Attack Surface Discovery vs massdns FAQ

Common questions when comparing DDactic Attack Surface Discovery vs massdns for external attack surface management.

### What is the difference between DDactic Attack Surface Discovery and massdns?

**DDactic Attack Surface Discovery**: Scans domains to discover attack surface, vulnerabilities, and generate hardening, built by DDactic.

**massdns**: A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration).

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

### Who makes DDactic Attack Surface Discovery and massdns?

**DDactic Attack Surface Discovery** is made by DDactic founded in 2026-01-01T00:00:00.000Z. **massdns** is open-source with 3,417 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is DDactic Attack Surface Discovery a good alternative to massdns?

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

## Related comparisons

- [DDactic Attack Surface Discovery vs SurfaceDiff](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-surfacediff)
- [DDactic Attack Surface Discovery vs MGM Security Partners recon me](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-mgm-security-partners-recon-me)
- [DDactic Attack Surface Discovery vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-ddactic-attack-surface-discovery)
- [massdns vs SurfaceDiff](https://cybersectools.com/compare/massdns-vs-surfacediff)
- [massdns vs MGM Security Partners recon me](https://cybersectools.com/compare/massdns-vs-mgm-security-partners-recon-me)
- [massdns vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-massdns)

## Alternatives to each

- [See all DDactic Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/ddactic-attack-surface-discovery)
- [See all massdns alternatives](https://cybersectools.com/alternatives/massdns)

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Source: https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-massdns

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

More on DDactic Attack Surface Discovery and massdns: 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