Kindroid

Replika

Replika is an AI companion app that presents itself as a personalized digital friend, remembering details about the user's relationships, routines, interests, and concerns to build contextually aware conversations over time. Users can customize their Rep's appearance and personality, and interact through text messaging, voice calls, and photo-based interactions like selfies and doodles. With tens of millions of registered users worldwide, Replika is one of the longer-running AI companion products, built around long-term relationship building rather than one-off Q&A. It is available as native iOS and Android apps as well as a legacy web app.

Pi

Pi, created by Inflection AI, is a conversational AI positioned as a "personal intelligence partner" rather than a productivity tool. It focuses on emotionally supportive, natural dialogue, helping users vent, think out loud, prepare for hard conversations, or simply chat about topics like science and culture. Beyond conversation, Pi handles daily-life tasks such as setting reminders and to-dos, and supports voice-based interaction so users can talk instead of type. It's available as a web app at hey.pi.ai plus iOS and Android apps, built by Inflection AI, a public benefit corporation focused on human-centered AI.

Character.AI

Character.AI lets users converse with AI-driven characters that have distinct personalities, or build and publish their own characters for others to chat with. Conversations can be text or voice-based, and the platform supports group chats mixing multiple AI characters and human participants in the same thread.