Very convenient
ClassUp is just what we're looking for! My daughter can attend classes anywhere as long as there's network. It's very convenient!
By Michelle G.
Sunday, November 8, 2026 · Customer reviews of US businesses
The Fair Hearing score
Great
134 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Cosmo provides AI-powered personalized learning for K-12 students. 1:1 Live Online Classes That Click. Real teachers + smart AI, always on your schedule.
Cosmo (formerly ClassUp) (cosmoai.com) has 134 customer reviews on The Fair Hearing, with an average rating of 4.1 out of 5.
Showing 99 reviews with 5 stars · Clear filters
ClassUp is just what we're looking for! My daughter can attend classes anywhere as long as there's network. It's very convenient!
By Michelle G.
Great so far. My kid is more confident doing math homework now.
By Robert V.
We had scheduled the class for Thursday, but there was an urgency. After communicating with ClassUp, the class was promptly rescheduled.
By Nikki E.
Brian is really great at teaching math! Very humorous and patient. My son love learn with him.
By Johnson
My daughter can't wait to attend another math class. She loves math now!
By Maximus P.
We met a few issues during the first class but the IT team fixed it very quickly. Now my son loves it!
By James M.
ClassUp has definitely exceeded our expectations. It's been 3 months and our daughter is improving so much in math.
By William
Our daughter met some difficult with her math and Ela. The tutors on ClassUp listen to her question, and gave her lots of instruction.
By Albert D.