Shodan vs SurfaceDiff: side-by-side comparison (2026)
Shodan is a free external attack surface management solution. SurfaceDiff is a commercial external attack surface management solution by SurfaceDiff. Features, integrations, deployment and the company behind each one, side by side.
KnocknocSponsored
Hi Citrix. Hide VPNs. Hide Windows on a LAN. Knocknoc solves this. Just in time identity linked allow-listing. DIY, on-premise or SaaS. Prevent attacks fast.
Visit
A search engine for the Internet of Things (IoT) that discovers and monitors devices connected to the internet.
Continuous external attack surface monitoring that shows what changed between scans.
Side-by-side comparison
Feature
Shodan
SurfaceDiff
Pricing model
Free
Commercial
Category
External Attack Surface Management
External Attack Surface Management
Deployment and fit
Deployment type
Cloud
Cloud
Company size fit
SMB, Mid-Market, Enterprise
Startup, SMB, Mid-Market, Enterprise
Company
Company
–
SurfaceDiff
Use cases and capabilities
Network Monitoring
Yes
No
DNS Security
No
Yes
Port Scanning
No
Yes
TLS
No
Yes
Subdomain Enumeration
No
Yes
Network Scanning
No
Yes
Security Scanning
No
Yes
Alerting
No
Yes
Reconnaissance
No
Yes
Visibility
No
Yes
Web Security
No
Yes
Core features
No features listed
9 features listed
Need help choosing?
See more solutions in this category, or build a security stack from your picks.
