Use case guide
AI companion chatbots are built for open-ended conversation and relationship, not task completion: a character you create and talk to over time, an empathetic assistant, or an AI built specifically for emotional support rather than answering questions. This is a different job than a general assistant like ChatGPT, which resets context by design and isn't built to remember a relationship across months of conversation. This is a small, early list by tool count, since most companion apps are consumer mobile products that haven't gone through this directory's research pipeline yet. If you're comparing options, Character.AI and Replika are the two most widely used and the two most people are actually searching for.
5 curated tools below.
Character.AI is a consumer AI chatbot platform where users create and converse with millions of user-generated AI characters for roleplay, companionship, creative writing, and casual conversation. It runs on proprietary and open-source language models fine-tuned through Character.AI's own pipeline, and offers both text chat and voice conversation features. The platform is one of the most widely used consumer AI companion apps, particularly popular among Gen Z and younger users.
Circle Labs (legal entity: Circle Labs, Inc.) builds Shapes — a social platform for creating and chatting with AI-powered characters in solo and group conversations. Users design "Shapes" with custom personalities, knowledge bases, and memory, then deploy them on Shapes.inc, Discord, and mobile apps. The product targets fandom communities, roleplay, and creative social AI rather than enterprise productivity.
Convai is a developer platform for building embodied conversational AI characters (NPCs) in 3D virtual worlds, games, and XR experiences. Characters can see (vision), hear, remember context, speak in 65+ languages, perform animations, and follow narrative flows. Integrates with Unreal Engine, Unity, WebGL/Three.js, and NVIDIA Omniverse via plugins and APIs.
Pi is Inflection AI's empathetic personal intelligence assistant, marketed as HeyPi in some directories. Unlike task-first chatbots, Pi prioritizes warm conversation, emotional support, and follow-up dialogue. Available on web, iOS, and Android. Inflection pivoted to enterprise after Microsoft's 2024 talent acquisition, but Pi continues as a free consumer product linked from inflection.ai.
Replika is an AI companion app from Luka Inc. with 42M+ users worldwide. Rebuilt in 2026, it offers emotionally intelligent conversation, persistent memory, voice and video calls, relationship modes, and proactive life coaching through a personalized AI friend.
| Tool | Best for | Pricing | Billing note |
|---|---|---|---|
| Character.AI | AI Companion & Roleplay Chatbot Platform | Freemium | Free Trial |
| Circle Labs | Social AI / AI character platform | Freemium | Free Trial |
| Convai | Conversational AI for games / virtual worlds (NPC platform) | Freemium | Free Trial |
| HeyPi | Personal AI assistant / conversational companion | Freemium | Free Trial |
| Replika | AI Companion / Personal AI | Freemium | Free Trial |
What's the difference between an AI companion app and a regular chatbot like ChatGPT?
Companion apps like Character.AI and Replika are built around a persistent character or relationship you interact with over time, with memory and personality designed to feel consistent. General assistants like ChatGPT are built for one-off tasks and don't market persistent relationship or companionship as the core feature.
Is Character.AI or Replika better for creating a custom character?
Character.AI is built specifically around user-created and community characters with distinct personalities, making it stronger for character creation and roleplay variety. Replika focuses more narrowly on a single ongoing companion relationship.
Are AI companion apps safe to use for emotional support?
They can help with loneliness or practicing conversation, but they aren't a substitute for professional mental health support, and several platforms have faced scrutiny over how they handle vulnerable users. Treat them as a supplement, not a replacement, for real support.
Can developers build their own AI companion or NPC characters?
Yes. Platforms like Convai are built specifically for developers embedding conversational AI characters into games and virtual worlds, rather than for consumers chatting directly in an app.