Co–Star is a consumer technology company best known for its AI-powered astrology and personalized horoscope mobile application. Founded in 2017, the platform combines NASA astronomical data with machine learning and astrological interpretation to generate customized birth charts, daily horoscopes, compatibility insights, and social features. Serving millions of users worldwide, Co–Star delivers highly personalized content designed to help users explore relationships, personality traits, and self-reflection through an engaging mobile experience. The company is headquartered in New York City and operates as a privately held technology business.