Metasploit is the world’s most used penetration testing framework, designed to help security teams find and exploit vulnerabilities before attackers do. It offers a massive library of pre-built exploits, payloads, and post-exploitation tools to automate the "hack" and prove a system's risk. Quick Stats: Purpose: Vulnerability research and ethical hacking. Developer: Maintained by Rapid7. Key Tool: The msfconsole is the primary command-line interface.