Decisionmentor is a versatile AI-powered decision-making application that simplifies complex decision processes for individuals, teams, and organizations. Utilizing an AI-driven, criteria-based approach, users can identify alternatives, prioritize criteria, and compare options visually. The tool is based on Analytic Hierarchy Process (AHP) theory and integrates OpenAI's GPT-3.5 API for relevant suggestions. Decisionmentor offers chat-based recommendations, decision visualization, and supports both public and private decision settings. Users can benefit from a clean design, multi-criteria decision-making capabilities, and a critical thinking approach. While private data is kept confidential, public decisions are shared in a feed for learning purposes. Overall, Decisionmentor is a valuable resource for those navigating complex choices and seeking advisory support for critical decisions.