libformatstr.py vs Tenzai: side-by-side comparison (2026)
libformatstr.py is a free penetration testing solution. Tenzai is a commercial penetration testing solution by Tenzai. Features, integrations, deployment and the company behind each one, side by side.
A Python library that simplifies format string vulnerability exploitation by providing tools for payload generation, memory manipulation, and automated parameter detection.
Agentic AI platform for continuous, autonomous penetration testing of enterprise apps.
Side-by-side comparison
Feature
libformatstr.py
Tenzai
Pricing model
Free
Commercial
Category
Penetration Testing
Penetration Testing
Deployment and fit
Deployment type
On-Premises
Hybrid
Company size fit
Mid-Market, Enterprise
Mid-Market, Enterprise
Open source
GitHub stars
347
–
Last commit
Jul 2017
–
Company
Company
–
Tenzai
Use cases and capabilities
Exploit Development
Yes
No
Vulnerability Exploitation
Yes
Yes
Payload Generation
Yes
No
ROP
Yes
No
AI Pentesting
No
Yes
Agentic AI Security
No
Yes
Continuous Testing
No
Yes
Red Team
No
Yes
Penetration Testing Framework
No
Yes
Vulnerability
No
Yes
Web Security
No
Yes
App Security
No
Yes
Core features
No features listed
6 features listed
Integrations
No integrations listed
2 integrations listed
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