# DNSAudit.io vs second-order: side-by-side comparison (2026)

[DNSAudit.io](https://cybersectools.com/tools/dnsauditio) is a free [security scanning](https://cybersectools.com/categories/security-scanning) solution by [DNSAudit.io](https://cybersectools.com/companies/dnsauditio). [second-order](https://cybersectools.com/tools/second-order) is a free [security scanning](https://cybersectools.com/categories/security-scanning) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | DNSAudit.io | second-order |
|---|---|---|
| Pricing model | Free | Free |
| Category | Security Scanning | Security Scanning |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | – | 408 |
| Last commit | – | Jun 2025 |
| Company | DNSAudit.io | – |
| Headquarters | – | – |

### Use cases and capabilities

| | DNSAudit.io | second-order |
|---|---|---|
| DNS Security | Yes | – |
| Misconfiguration | Yes | – |
| DMARC | Yes | – |
| SPF | Yes | – |
| DKIM | Yes | – |
| Security Scanning | Yes | Yes |
| Reconnaissance | Yes | – |
| DNS Rebinding | Yes | – |
| Subdomain Enumeration | – | Yes |

### Core features

**DNSAudit.io**

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

**second-order**

No features listed.

## Which one fits you

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

- [DNSAudit.io](https://cybersectools.com/tools/dnsauditio) fits if you want a cloud product.
- [second-order](https://cybersectools.com/tools/second-order) fits if you need to run it on your own servers and you want an open-source product.

## DNSAudit.io vs second-order FAQ

Common questions when comparing DNSAudit.io vs second-order for security scanning.

### What is the difference between DNSAudit.io and second-order?

**DNSAudit.io**: Free DNS security scanner that checks domains for misconfigs and exposure. Built by DNSAudit.io.

**second-order**: Second-order subdomain takeover scanner.

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

### Who makes DNSAudit.io and second-order?

**DNSAudit.io** is made by DNSAudit.io. **second-order** is open-source with 408 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is DNSAudit.io a good alternative to second-order?

Often, yes. DNSAudit.io and second-order are both Security Scanning products, and both cover Security Scanning. Key differences: second-order is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [DNSAudit.io vs Domain Verity](https://cybersectools.com/compare/dnsauditio-vs-domain-verity)
- [DNSAudit.io vs CyberChecker](https://cybersectools.com/compare/cyberchecker-vs-dnsauditio)
- [DNSAudit.io vs RoboShadow OWASP ZAP Vulnerability Scanner](https://cybersectools.com/compare/dnsauditio-vs-roboshadow-owasp-zap-vulnerability-scanner)
- [second-order vs Domain Verity](https://cybersectools.com/compare/domain-verity-vs-second-order)
- [second-order vs CyberChecker](https://cybersectools.com/compare/cyberchecker-vs-second-order)
- [second-order vs RoboShadow OWASP ZAP Vulnerability Scanner](https://cybersectools.com/compare/roboshadow-owasp-zap-vulnerability-scanner-vs-second-order)

## Alternatives to each

- [See all DNSAudit.io alternatives](https://cybersectools.com/alternatives/dnsauditio)
- [See all second-order alternatives](https://cybersectools.com/alternatives/second-order)

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Source: https://cybersectools.com/compare/dnsauditio-vs-second-order

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

More on DNSAudit.io and second-order: 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