# DDactic Attack Surface Discovery vs Projectdiscovery.io | Chaos: 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). [Projectdiscovery.io | Chaos](https://cybersectools.com/tools/projectdiscoveryio-or-chaos) 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 | Projectdiscovery.io \| Chaos |
|---|---|---|
| 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 | Startup, SMB, Mid-Market, Enterprise |
| Company | DDactic | – |
| Headquarters | – | – |

### Use cases and capabilities

| | DDactic Attack Surface Discovery | Projectdiscovery.io \| Chaos |
|---|---|---|
| Subdomain Enumeration | Yes | Yes |
| Vulnerability | Yes | – |
| DDoS | Yes | – |
| DNS Security | Yes | Yes |
| Network Scanning | Yes | – |
| Security Scanning | Yes | – |
| Port Scanning | Yes | – |
| SSL | Yes | – |
| Data Breach | Yes | – |
| Reconnaissance | Yes | – |

### Core features

**DDactic Attack Surface Discovery**

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

**Projectdiscovery.io | Chaos**

No features listed.

### Integrations

**DDactic Attack Surface Discovery**

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

**Projectdiscovery.io | Chaos**

No integrations listed.

## Which one fits you

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

- [Projectdiscovery.io | Chaos](https://cybersectools.com/tools/projectdiscoveryio-or-chaos) fits if you need a free product.

## DDactic Attack Surface Discovery vs Projectdiscovery.io | Chaos FAQ

Common questions when comparing DDactic Attack Surface Discovery vs Projectdiscovery.io | Chaos for external attack surface management.

### What is the difference between DDactic Attack Surface Discovery and Projectdiscovery.io | Chaos?

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

**Projectdiscovery.io | Chaos**: A powerful enumeration tool for discovering assets and subdomains.

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

### Is DDactic Attack Surface Discovery a good alternative to Projectdiscovery.io | Chaos?

Often, yes. DDactic Attack Surface Discovery and Projectdiscovery.io | Chaos are both External Attack Surface Management products, and both cover DNS Security, Subdomain Enumeration. Key differences: DDactic Attack Surface Discovery is Commercial while Projectdiscovery.io | Chaos is Free. 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)
- [Projectdiscovery.io | Chaos vs SurfaceDiff](https://cybersectools.com/compare/projectdiscoveryio-or-chaos-vs-surfacediff)
- [Projectdiscovery.io | Chaos vs MGM Security Partners recon me](https://cybersectools.com/compare/mgm-security-partners-recon-me-vs-projectdiscoveryio-or-chaos)
- [Projectdiscovery.io | Chaos vs Cylana EASM](https://cybersectools.com/compare/cylana-easm-vs-projectdiscoveryio-or-chaos)

## Alternatives to each

- [See all DDactic Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/ddactic-attack-surface-discovery)
- [See all Projectdiscovery.io | Chaos alternatives](https://cybersectools.com/alternatives/projectdiscoveryio-or-chaos)

---

Source: https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-projectdiscoveryio-or-chaos

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 Projectdiscovery.io | Chaos: 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