
Co–Star is an astrology app that utilizes NASA data and insights from professional astrologers to provide hyper-personalized, real-time horoscopes. By generating detailed birth charts and compatibility analyses, it allows users to understand their emotional tendencies and relationships in a unique way. The app stands out by merging advanced AI technology with traditional astrological practices, making astrology accessible to a broader audience. With millions of daily users and a strong cultural presence, Co–Star is positioned as a leader in the astrology app market, appealing particularly to millennials seeking deeper connections and self-reflection.

Co–Star is an astrology app that utilizes NASA data and insights from professional astrologers to provide hyper-personalized, real-time horoscopes. By generating detailed birth charts and compatibility analyses, it allows users to understand their emotional tendencies and relationships in a unique way. The app stands out by merging advanced AI technology with traditional astrological practices, making astrology accessible to a broader audience. With millions of daily users and a strong cultural presence, Co–Star is positioned as a leader in the astrology app market, appealing particularly to millennials seeking deeper connections and self-reflection.
Product: Personalized astrology app combining NASA ephemeris data, machine-generated copy, and human astrologer input
Founded / HQ: Launched 2017; New York, NY
Founders / CEO: Anna Kopp; Banu Guler (Founder & CEO); Ben Weitzman
Funding: Multiple rounds including ~$5.2M seed (2019) and a Series A in Apr 2021; total reported funding ~$20.95M
Employees (reported): 36
Consumer mobile astrology / personalized wellness and self-reflection tools
2017
Consumer mobile apps; Astrology / Wellness
750000
Reported approximate pre-seed amount prior to 2019
5200000
Seed announced to expand to Android and grow the team
Series A led by Spark Capital reported in April 2021
“Includes investors such as Spark Capital, Female Founders Fund, and Maveron”