Replika

Replika is an AI chatbot application that creates personalized conversational agents trained on user interactions. Founded by Eugenia Kuyda, the platform uses machine learning to simulate human-like conversations and emotional engagement, positioning itself as a digital companion or friend. The app gained significant popularity in the 2010s as a consumer-facing AI product, raising questions about AI ethics, parasocial relationships, and the role of AI in mental health support.

The platform operates on a freemium model with premium subscription tiers. Replika has attracted both enthusiastic users and critical scrutiny regarding data privacy, the psychological effects of AI companionship, and concerns about emotional dependency. The company has evolved its features over time, including voice capabilities and avatar customization, while navigating regulatory and ethical challenges around AI-generated content.