crt.guru vs ctlogs.dev: side-by-side comparison (2026)
crt.guru is a commercial external attack surface management solution by Crt.guru. ctlogs.dev is a commercial external attack surface management solution by Apps34. Features, integrations, deployment and the company behind each one, side by side.
External TLS cert monitoring with expiry alerts, vuln scanning & compliance reports.
Fast Certificate Transparency search and JSON API for subdomain reconnaissance.
Side-by-side comparison
Feature
crt.guru
ctlogs.dev
Pricing model
Commercial
Commercial
Category
External Attack Surface Management
External Attack Surface Management
Verified
No
Verified
Deployment and fit
Deployment type
Cloud
Cloud
Company size fit
Startup, SMB, Mid-Market, Enterprise
Startup
Company
Company
Crt.guru
Apps34
Use cases and capabilities
TLS
Yes
Yes
SSL
Yes
Yes
PCI DSS
Yes
No
NIST
Yes
No
Security Scanning
Yes
No
Alerting
Yes
No
Security Compliance Training
Yes
No
Security Reporting
Yes
No
Vulnerability
Yes
No
REST API
Yes
Yes
Reconnaissance
No
Yes
OSINT
No
Yes
Cyber Threat Intelligence
No
Yes
DNS Security
No
Yes
Attack Detection
No
Yes
Subdomain Enumeration
No
Yes
Core features
10 features listed
- Real-time Certificate Transparency Search
- Automated Subdomain Enumeration
- High-Performance REST JSON API
- Wildcard & Fingerprint Matching
- SSL/TLS Certificate History Tracking
- Attack Surface Mapping
- Historical Log Archiving
- Instant Domain & Issuer Filtering
Integrations
4 integrations listed
REST API
cURL
Python
JSON
Webhooks
SIEM
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