CoStar Group reviews

2.7

34% would recommend to a friend

(3,017 total reviews)
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Andrew C. Florance

32% approve of CEO

38% positive business outlook

CoStar Group has an employee rating of 2.7 out of 5 stars, based on 3,017 company reviews on Glassdoor which indicates that most employees have an average working experience there. The CoStar Group employee rating is 22% below average for employers within the Real Estate industry (3.5 stars).

Reviews by job title

3K reviews
1.0
Sep 3, 2025
Recommend
CEO approval
Business Outlook

Pros

Great work-life balance, fantastic benefits (the best I have ever had), and fantastic people who work there.

Cons

Management hired me as a content writer with promises of full-time employment, but I later discovered I was unknowingly being used to generate training data for an AI system. They had me create extensive written content under the guise of regular work assignments, when in reality they were feeding everything I wrote into their AI model. Once the AI was sufficiently trained on my writing style and could replicate my work, they terminated my position and replaced me with the automated system. This was clearly planned from the beginning - they never intended to honor their commitment to full-time employment. The irony is that the AI they replaced me with wasn't even competent - it would make glaring errors like describing contemporary glass buildings (such as 1 Grand Army Plaza by Richard Meier) as having traditional features like barrel vaulted ceilings in the lobby. They sacrificed quality work and ethical business practices to cut costs with subpar automation. It's a deceptive practice that exploits writers' labor to build the very technology that eliminates their jobs, and they can't even do it well.

Viewing 250 - 252 of 3,017 Reviews

Glassdoor has 3,109 CoStar Group reviews submitted anonymously by CoStar Group employees. Read employee reviews and ratings on Glassdoor to decide if CoStar Group is right for you.