crt.sh vs GlobalSign Atlas: 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 Atlas 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. DevSecOps teams managing certificate sprawl across Kubernetes and CI/CD pipelines should choose GlobalSign Atlas for automated issuance and renewal that actually integrates with your toolchain, not bolted on after the fact. ACME protocol support, native cert-manager and Kubernetes integration, plus HSM-backed private key protection mean you're not babysitting certificate expiration alerts or managing manual renewal workflows. Skip this if your organization runs on-premises infrastructure exclusively and needs a Private CA entirely within your own data center; Atlas's cloud-hosted model trades some isolation for operational simplicity.
