altdns vs Cylana EASM: side-by-side comparison (2026)
altdns is a free external attack surface management solution. Cylana EASM is a commercial external attack surface management solution by Cylana. 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 tool for generating permutations, alterations and mutations of subdomains and resolving them
AI-powered EASM platform for digital asset discovery and monitoring.
Side-by-side comparison
Feature
altdns
Cylana EASM
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
SMB, Mid-Market, Enterprise
Open source
GitHub stars
2,439
–
Last commit
Jan 2025
–
Company
Company
–
Cylana
Use cases and capabilities
Reconnaissance
Yes
Yes
Network Discovery
No
Yes
Subdomain Enumeration
No
Yes
Attack Detection
No
Yes
Security Scanning
No
Yes
Inventory
No
Yes
Network Mapping
No
Yes
Visibility
No
Yes
Vulnerability
No
Yes
Digital Risk Protection
No
Yes
Core features
No features listed
5 features listed
Need help choosing?
See more solutions in this category, or build a security stack from your picks.
