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

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.

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.

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.