crt.sh vs GlobalSign Qualified Trust Seals: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
crt.sh is a free external attack surface management tool. GlobalSign Qualified Trust Seals is a commercial certificate lifecycle management tool by GlobalSign. 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 VerdictShort answer
Security teams doing threat intelligence or domain monitoring should use crt.sh as a free, fast way to spot certificate issuance anomalies that signal domain takeover or phishing campaigns before they scale. Certificate Transparency logs index roughly 15 billion certificates, giving you real-time visibility into what's been legitimately issued against your domains and competitors' infrastructure. Skip this if you need automated alerting or integration into your SIEM; crt.sh is a lookup tool, not a monitoring platform, and catching malicious certificates requires manual checks or custom scripting. Organizations across SMB to Enterprise that need legally binding document signatures under eIDAS regulation should evaluate GlobalSign Qualified Trust Seals for its automated bulk sealing via API, which eliminates manual signing bottlenecks in high-volume workflows. The solution carries EUTL verification and includes qualified timestamps with each seal, meaning signatures hold up in EU legal proceedings without the friction of traditional certificate management. Skip this if your documents never cross EU borders or if you need MFA-gated signing; the lack of mandatory authentication is intentional for automation but creates audit gaps in regulated industries requiring strict access controls.
