Features, pricing, ratings, and pros & cons — compared head-to-head.
DNSAudit.io is a free security scanning tool by DNSAudit.io. second-order is a free security scanning tool. Compare features, ratings, integrations, and community reviews side by side to find the best security scanning fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Security teams hunting subdomain takeover vulnerabilities before attackers find them should use second-order, a free scanner that catches dangling DNS records pointing to unclaimed hosting services. The tool has 408 GitHub stars and zero friction to deploy; it's built to run locally or in CI/CD without vendor lock-in. Skip this if you need a full attack surface management platform covering certificate transparency logs, WHOIS changes, and passive reconnaissance; second-order does one job and does it fast.
Free DNS security scanner that checks domains for misconfigs and exposure.
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I started using DNSAudit.io to do a quick sanity check on a client's domain before a migration. Ended up finding a wildcard DNS entry that had been sitting there for years, completely forgotten. The scan is fast and doesn't require an account, which matters when you're jumping between client environments. The scoring breakdown is actually useful, not just a traffic light. It tells you what's wrong and why. And I really love they also explain how to fix all the issues you find in the results!! Also i have started using its api as well and its works amazingly good for integrations
Solid free tool for a first pass on DNS security posture. Useful if you need to hand a non-technical stakeholder something with a score and clear findings. Checks zone transfer exposure, SPF/DMARC/DKIM, DNSSEC, and a bunch of other things I normally have to check manually with dig.
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Common questions about comparing DNSAudit.io vs second-order for your security scanning needs.
DNSAudit.io: Free DNS security scanner that checks domains for misconfigs and exposure. built by DNSAudit.io. Core capabilities include 40+ automated DNS security checks per domain scan, DNS security score and letter grade (A+ to F), SPF, DMARC, and DKIM validation..
second-order: Second-order subdomain takeover scanner..
Both serve the Security Scanning market but differ in approach, feature depth, and target audience.
DNSAudit.io is developed by DNSAudit.io. second-order is open-source with 408 GitHub stars. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.
DNSAudit.io and second-order serve similar Security Scanning use cases: both are Security Scanning tools, both cover Security Scanning. Key differences: second-order is open-source. Review the feature comparison above to determine which fits your requirements.
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