as3nt vs crt.guru: side-by-side comparison (2026)
as3nt is a free external attack surface management solution. crt.guru is a commercial external attack surface management solution by Crt.guru. Features, integrations, deployment and the company behind each one, side by side.
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A tool for enumerating subdomains of a given domain
External TLS cert monitoring with expiry alerts, vuln scanning & compliance reports.
Side-by-side comparison
Feature
as3nt
crt.guru
Pricing model
Free
Commercial
Category
External Attack Surface Management
External Attack Surface Management
Deployment and fit
Deployment type
On-Premises
Cloud
Company size fit
Startup, SMB, Mid-Market, Enterprise
Startup, SMB, Mid-Market, Enterprise
Open source
GitHub stars
12
–
Last commit
Oct 2022
–
Company
Company
–
Crt.guru
Use cases and capabilities
Security Research
Yes
No
Subdomain Enumeration
Yes
No
TLS
No
Yes
SSL
No
Yes
PCI DSS
No
Yes
NIST
No
Yes
Security Scanning
No
Yes
Alerting
No
Yes
Security Compliance Training
No
Yes
Security Reporting
No
Yes
Vulnerability
No
Yes
REST API
No
Yes
Core features
No features listed
10 features listed
Integrations
No integrations listed
4 integrations listed
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