crt.sh vs ThreatDefence Integrated ASM: Side-by-Side Comparison (2026)

crt.sh: Bash script for subdomain enumeration via crt.sh certificate transparency logs. Core capabilities include Subdomain enumeration via certificate transparency logs, Automated querying of crt.sh website, Parsing and filtering of crt.sh output..

ThreatDefence Integrated ASM: ASM platform monitoring external attack surface, dark web leaks & 3rd-party risks. built by ThreatDefence. Core capabilities include Real-time external attack surface monitoring, Insecure DNS domain and subdomain detection, SSL certificate misconfiguration detection..

Both serve the External Attack Surface Management market but differ in approach, feature depth, and target audience.

crt.sh differentiates with Subdomain enumeration via certificate transparency logs, Automated querying of crt.sh website, Parsing and filtering of crt.sh output. ThreatDefence Integrated ASM differentiates with Real-time external attack surface monitoring, Insecure DNS domain and subdomain detection, SSL certificate misconfiguration detection.

crt.sh integrates with crt.sh. ThreatDefence Integrated ASM integrates with ThreatDefence Cloud SIEM. Check integration compatibility with your existing security stack before deciding.

crt.sh and ThreatDefence Integrated ASM serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover DNS Security, SSL, Subdomain Enumeration. Key differences: crt.sh is Free while ThreatDefence Integrated ASM is Commercial. Review the feature comparison above to determine which fits your requirements.