replika.com

Replika is an AI companion application developed by Luka, Inc., founded in 2017 by Eugenia Kuyda and Phil Dudchuk and headquartered in San Francisco, California. The app allows users to build a personalized AI chatbot, referred to as a "Replika," through ongoing conversation, with the system adapting its personality and responses over time based on user interactions.

The core product is a mobile and web application available on iOS, Android, and Oculus platforms. Users can engage in text and voice conversations, and paid subscribers gain access to augmented reality features and relationship personas. The app has attracted significant attention for its use in emotional support and companionship contexts, and has been downloaded by tens of millions of users globally. In early 2023, Replika restricted certain relationship-oriented features following regulatory pressure from Italy's data protection authority, later partially restoring them.

Luka, Inc. raised approximately $11 million in funding, with investors including Khosla Ventures. The company operates with a relatively small team. Eugenia Kuyda, who originally built an early version of the technology as a memorial chatbot for a deceased friend, has served as CEO since the company's founding.