SurfaceDiff vs tko-subs: side-by-side comparison (2026)
SurfaceDiff is a commercial external attack surface management solution by SurfaceDiff. tko-subs is a free external attack surface management solution. Features, integrations, deployment and the company behind each one, side by side.
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Continuous external attack surface monitoring that shows what changed between scans.
A tool for detecting and taking over subdomains with dead DNS records
Side-by-side comparison
Feature
SurfaceDiff
tko-subs
Pricing model
Commercial
Free
Category
External Attack Surface Management
External Attack Surface Management
Deployment and fit
Deployment type
Cloud
On-Premises
Company size fit
Startup, SMB, Mid-Market, Enterprise
Startup, SMB, Mid-Market, Enterprise
Open source
GitHub stars
–
766
Last commit
–
Jan 2021
Company
Company
SurfaceDiff
–
Use cases and capabilities
DNS Security
Yes
No
Port Scanning
Yes
No
TLS
Yes
No
Subdomain Enumeration
Yes
Yes
Network Scanning
Yes
No
Security Scanning
Yes
No
Alerting
Yes
No
Reconnaissance
Yes
No
Visibility
Yes
No
Web Security
Yes
No
Security Research
No
Yes
Core features
9 features listed
No features listed
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