mailspoof vs NSO Group: side-by-side comparison (2026)
mailspoof is a free email security platforms solution. NSO Group is a commercial red-team & adversary emulation solution by NSO Group. Features, integrations, deployment and the company behind each one, side by side.
A command-line tool that analyzes SPF and DMARC records to identify domains vulnerable to email spoofing attacks.
Govt-focused cyber intelligence & surveillance software provider.
Side-by-side comparison
Feature
mailspoof
NSO Group
Pricing model
Free
Commercial
Category
Email Security Platforms
Red-Team & Adversary Emulation
Deployment and fit
Deployment type
On-Premises
On-Premises
Company size fit
Startup, SMB, Mid-Market, Enterprise
Enterprise
Open source
GitHub stars
131
–
Last commit
Oct 2020
–
Company
Company
–
NSO Group
Use cases and capabilities
Red Team
Yes
No
OSINT
Yes
Yes
Spoofing
Yes
No
DMARC
Yes
No
SPF
Yes
No
Core features
No features listed
5 features listed
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