crt.guru vs DNS Assistant: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
crt.guru is a commercial external attack surface management tool by Crt.guru. DNS Assistant is a commercial external attack surface management tool by DNS Assistant. Compare features, ratings, integrations, and community reviews side by side to find the best external attack surface management fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
CST VerdictBased on our analysis of core features, integrations, company size fit, deployment model, here is our conclusion:
Security teams managing external-facing services across multiple regions need crt.guru for its multi-protocol scanning and Certificate Transparency monitoring, which catches unauthorized cert issuance before your domain gets impersonated. The tool covers ID.AM and DE.CM effectively by mapping your cert portfolio across Frankfurt, New York, and Amsterdam simultaneously, then alerting at granular intervals (30, 14, 7, 1 day) so you're not racing against expiry deadlines. Skip this if your organization has zero external TLS endpoints or relies on a managed WAF vendor that already owns cert lifecycle; crt.guru solves a specific problem rather than replacing internal PKI tooling.
Data verified Sep 2026
