Pi AI (Personal Intelligence) is a friendly, empathetic AI chatbot developed by Inflection AI designed for supportive, natural, and engaging conversations, acting as a personal coach, brainstorming partner, or companion for advice, learning, and exploring ideas, available for free on its website Pi.ai. It focuses on human-like interaction, offers voice responses with customizable voices, and helps users with various tasks from personal advice to creative writing, distinct from tools focused purely on information retrieval.