King Phisher

King Phisher is a robust, open-source framework designed to simulate real-world phishing attacks for security testing and awareness training. Built on a client-server architecture, it allows multiple analysts to collaborate on a single campaign simultaneously. Technically, it utilizes a Python-based backend with a PostgreSQL database to manage state, while the client interface is built using GTK3. Its architecture is specifically optimized for high-volume delivery and granular tracking, including the ability to monitor email opens, link clicks, and credential submission in real-time. In the 2026 landscape, while many organizations have moved to SaaS-based awareness platforms, King Phisher remains a staple for Red Teams and advanced security researchers who require full control over their data, infrastructure, and bypass techniques without the restrictions often found in commercial platforms. It supports advanced features like SMS phishing (smishing), geographic location tracking via IP address, and deep integration with Jinja2 for dynamic email and web template rendering. Its extensible plugin architecture ensures that it can be adapted to modern MFA-bypass scenarios and complex social engineering workflows, maintaining its relevance as a top-tier tool for professional security assessments.