C

Co-Star

AI-powered natal astrology and social app

Overview

Co-Star offers a mobile app that delivers personalized horoscopes by building each user's natal chart from exact birth data and NASA planetary positions, interpreted with help from human astrologers and a proprietary AI. The app updates daily with readings, provides personality insights, and lets users connect with friends to compare compatibility; The Void adds AI-generated answers to user questions based on each chart. It differentiates itself by using precise natal charts and real NASA data combined with AI and astrologers, plus social features for reflection and connection. Its goal is to reduce loneliness by making astrology a practical tool for daily reflection and conversation within a wellness and social network.

Work here?Claim your company

About Co-Star

Simplify's Rating
Why Co-Star is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & AnalyticsConsumer SoftwareAI & Machine LearningEntertainment

Company Size

11-50

Company Stage

Series A

Total Funding

$21M

Headquarters

New York City, New York

Founded

2017

Get referred to Co-Star

See people who can refer or advise you

Simplify Jobs

Simplify's take

What believers are saying

  • Bloomberg said Co-Star reached about 4.3 million monthly active users in 2026.
  • Midjourney bought Co-Star in spring 2026, signaling confidence in consumer engagement.
  • The Void launched in July 2023, proving users pay for AI-generated horoscope interactions.

What critics are saying

  • Co-Star’s privacy policy still allows data sharing during acquisitions as of October 2026.
  • Midjourney can fold Co-Star into a broader app strategy, erasing Co-Star’s standalone brand.
  • Astrology revenue depends on discretionary subscriptions; user churn kills freemium conversion quickly.

What makes Co-Star unique

  • Co-Star fused NASA ephemerides, human astrologers, and AI before Midjourney’s 2026 acquisition.
  • Banu Guler joined Midjourney as chief design officer on July 23, 2026.
  • Its social compatibility graph turns horoscope checking into daily friend interaction.

Help us improve and share your feedback! Did you find this helpful?

Funding

Total Funding

$21M

Meets

Industry Average

Funded Over

3 Rounds

Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Meet Average

Industry standards

$15M
$8.2M
$15M
$15M
$30M

Benefits

  • Health Insurance
  • Vision Insurance
  • Dental Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Unlimited Paid Time Off
  • Paid Vacation
  • Parental Leave
  • Stock Options
  • Equity Grants
  • Wellness Program
  • Mental Health Support

Growth & Insights and Company News

6 month growth

0%

1 year growth

-5%

2 year growth

0%
TechCrunch
Jul 24th, 2026
Midjourney acquired the astrology app Co-Star.

Midjourney acquired the astrology app Co-Star. Midjourney, an AI lab best known for its LLM-powered image and video generators, has acquired the social astrology app Co-Star, according to Bloomberg. The deal terms were not disclosed. Co-Star, which reportedly has about 4.3 million monthly active users, is mostly used to help people determine their astrological birth charts, which they can then share with other friends on the app. Co-Star uses both AI and humans to write horoscopes, compatibility assessments, and other advice based on a user's astrological information. Midjourney seems to be casting a wide net when it comes its product lineup. The company seems almost synonymous with the Discord server where users can generate text and images - there is no stand-alone Midjourney app - yet the AI lab is also trying to build a medical arm and spa. Why not throw an astrology app in the mix? Co-Star's team of two dozen employees has joined Midjourney as part of the acquisition. Given the team's experience in building consumer apps, Midjourney could perhaps finally get its own stand-alone app. October 13 - 15 San Francisco Scale faster. Grow your portfolio. Gain practical expertise. No matter your goal, Disrupt can empower you. Save up to $330 today!

Bloomberg
Jul 24th, 2026
AI startup Midjourney acquires astrology app Co-Star, plans first standalone image app

Midjourney has acquired astrology app Co-Star and is developing its first standalone image-generation application. The artificial intelligence startup's moves represent its latest push into new business areas following an announcement last month about ambitious expansion plans. The acquisition of the popular astrology app marks a significant diversification for Midjourney, which has primarily focused on AI-powered image generation. Details about the acquisition terms were not disclosed. The company is simultaneously working on its own image-generation app, expanding beyond its current offerings. These strategic developments signal Midjourney's broader ambitions to establish presence across multiple consumer-facing product categories.

Reporter.am
Apr 6th, 2025
J-Star Holding Co. Ltd. $6M IPO

J-Star Holding Co., Ltd. (YMAT) plans to raise $6 million in an IPO the week of April 14th, issuing 1.3 million shares at $4.00-$5.00 each. The company, with a market cap of $76.6 million, generated $18 million in revenue and $1.9 million in net income over the past year. Maxim Group is the underwriter. The IPO size was reduced to 1.25 million shares to raise $5.63 million, with Maxim Group as the sole book-runner, replacing EF Hutton.

Bustle
May 23rd, 2023
The Co-Star Astrology App Has A New AI-Powered Feature

Astrology app Co-Star launched a new in-app AI feature that allows you to ask the stars personalized questions and it will provide answers based on your birth chart.

Recently Posted Jobs

Sign up to get curated job recommendations

Co-Star is Hiring for 6 Jobs on Simplify!

Find jobs on Simplify and start your career today

Don't see your dream role? Check out thousands of other roles on Simplify.Browse all jobs