QuizUp Story: From Million-Dollar Funding to Shutdown
QuizUp grew to 80 million users as one of the world’s most popular trivia apps—but failed to turn that growth into a sustainable business.
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Company
QuizUp
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Thor Fridriksson
Thor Fridriksson is the founder of QuizUp, a viral trivia app that grew to millions of users but struggled with monetization.

Why This Failure Matters
User growth means nothing without revenue—this story shows how millions of users can still lead to failure if monetization is ignored.
Story Overview
Founded in 2013 by Thor Fridriksson, QuizUp became a global sensation, attracting millions of users with its social trivia gameplay.
Despite rapid growth and strong engagement, the company struggled to monetize effectively. After acquisition and multiple attempts to sustain the business, QuizUp eventually shut down in 2021.
It remains a powerful lesson on why growth without revenue is a dangerous game.
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