ctlogs.dev vs S3BucketList: side-by-side comparison (2026)
ctlogs.dev is a commercial external attack surface management solution by Apps34. S3BucketList is a free external attack surface management solution. Features, integrations, deployment and the company behind each one, side by side.
Fast Certificate Transparency search and JSON API for subdomain reconnaissance.
A Chrome extension that automatically detects and lists Amazon S3 buckets while browsing websites.
Side-by-side comparison
Feature
ctlogs.dev
S3BucketList
Pricing model
Commercial
Free
Category
External Attack Surface Management
External Attack Surface Management
Deployment and fit
Deployment type
Cloud
Cloud
Company size fit
Startup
Startup, SMB, Mid-Market, Enterprise
Open source
GitHub stars
–
124
Last commit
–
Aug 2025
Company
Company
Apps34
–
Use cases and capabilities
Reconnaissance
Yes
Yes
OSINT
Yes
No
SSL
Yes
No
TLS
Yes
No
REST API
Yes
No
Cyber Threat Intelligence
Yes
No
DNS Security
Yes
No
Attack Detection
Yes
No
Subdomain Enumeration
Yes
No
Enumeration
No
Yes
Browser Security
No
Yes
S3
No
Yes
AWS
No
Yes
Core features
- 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
No features listed
Integrations
REST API
cURL
Python
JSON
Webhooks
SIEM
No integrations listed
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