crt.sh vs Threat Surface - Attack Surface Management: 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..

Threat Surface - Attack Surface Management: EASM platform for continuous discovery and risk assessment of external assets. Core capabilities include Continuous automated asset discovery, Shadow IT and forgotten subdomain detection, Unmanaged cloud resource identification..

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. Threat Surface - Attack Surface Management differentiates with Continuous automated asset discovery, Shadow IT and forgotten subdomain detection, Unmanaged cloud resource identification.

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