crt.guru vs Guardz External Footprint: Side-by-Side Comparison (2026)

crt.guru: External TLS cert monitoring with expiry alerts, vuln scanning & compliance reports. built by crt.guru. Core capabilities include Multi-region external TLS scanning (Frankfurt, New York, Amsterdam), Certificate expiry alerts at 30, 14, 7, and 1 day intervals, Vulnerability scanning (Heartbleed, ROBOT, CCS Injection, weak ciphers)..

Guardz External Footprint: External attack surface monitoring with dark web intelligence and scanning. built by Guardz. Core capabilities include External service scanning for open ports and public exposures, DNS email record monitoring for SPF, DKIM, and DMARC, TLS/SSL certificate monitoring..

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

crt.guru differentiates with Multi-region external TLS scanning (Frankfurt, New York, Amsterdam), Certificate expiry alerts at 30, 14, 7, and 1 day intervals, Vulnerability scanning (Heartbleed, ROBOT, CCS Injection, weak ciphers). Guardz External Footprint differentiates with External service scanning for open ports and public exposures, DNS email record monitoring for SPF, DKIM, and DMARC, TLS/SSL certificate monitoring.

crt.guru is developed by crt.guru. Guardz External Footprint is developed by Guardz. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

crt.guru integrates with Email, Telegram, Discord, Slack. Guardz External Footprint integrates with Google Workspace, Microsoft 365. Check integration compatibility with your existing security stack before deciding.

crt.guru and Guardz External Footprint serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover SSL, TLS. Review the feature comparison above to determine which fits your requirements.