Pi by Inflection AI

Pi is a personal AI assistant from Inflection AI designed around emotional intelligence and natural conversation rather than productivity or coding. Where most assistants optimize for tasks and information retrieval, Pi optimizes for the experience of talking — voice-first responses with multiple lifelike voices, a calm conversational style, and a default willingness to listen rather than instruct. Users return to Pi for journaling, decision-making, late-night thinking, learning new topics by talking them through, and processing emotions in a way that other LLM chatbots feel poorly suited for. Inflection has continued to develop the Pi consumer experience while pivoting much of its energy toward Inflection 3.0 enterprise products that bring the same emotionally-tuned model behavior to large organizations — customer support, employee assistance, and other applications where tone and empathy matter. Pi is free on web, iOS, Android, and through major messaging apps (WhatsApp, Messenger, SMS, Instagram), funded by Inflection's enterprise business. The model behind Pi has gone through several major versions (Inflection-2, Inflection-2.5, and follow-ons) and consistently ranks highly on conversational quality benchmarks even when it underperforms frontier models on reasoning and code. Best for users who want an AI to talk with rather than a tool to delegate to.