crt.sh vs Projectdiscovery.io | Chaos: side-by-side comparison (2026)
crt.sh is a free external attack surface management solution. Projectdiscovery.io | Chaos is a free external attack surface management solution. 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
Bash script for subdomain enumeration via crt.sh certificate transparency logs.
A powerful enumeration tool for discovering assets and subdomains.
Side-by-side comparison
Feature
crt.sh
Projectdiscovery.io | Chaos
Pricing model
Free
Free
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
Startup, SMB, Mid-Market, Enterprise
Use cases and capabilities
Subdomain Enumeration
Yes
Yes
Reconnaissance
Yes
No
Open Source
Yes
No
Bug Bounty
Yes
No
Enumeration
Yes
No
Network Reconnaissance
Yes
No
SSL
Yes
No
DNS Security
Yes
Yes
Security Scanning
Yes
No
Core features
5 features listed
No features listed
Integrations
1 integration listed
No integrations listed
Need help choosing?
See more solutions in this category, or build a security stack from your picks.
