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Type of site
Brilliant.org is an American for-profit company and associated community that features problems and courses in mathematics, physics, quantitative finance, and computer science. It operates via a freemium business model.
Brilliant was founded in 2012. At the Launch Festival in March 2013, CEO and co-founder Sue Khim presented the idea of Brilliant, attracting funding from venture capitalist Chamath Palihapitiya.
In August 2013, TechCrunch reported that Brilliant.org had raised money from Palihapitiya's Social+Capital Partnership as well as from 500 Startups, Kapor Capital, Learn Capital, and Hyde Park Angels and that the website had over 100,000 users. As of July 2017, the website has over 4 million registered users, and as of April 2019, the company had reached a valuation of $50 million.
Brilliant has over 60+ guided problem-solving-based courses in math, science, engineering, and quantitative finance courses. A paid mobile app with the added features of downloadable courses with offline access is available.
Additionally, Brilliant publishes challenging problems in math and science each week from problems written by members of their community. Brilliant also maintains an interactive, community-written math and science wiki.
Several publications have noted Brilliant for its success in identifying promising young mathematicians and scientists worldwide.  Commonly cited examples include Farrell Wu from the Philippines, Dylan Toh of Singapore, and Phoebe Cai of the United States.
Brilliant regularly contributes math and science puzzles to publications such as The New York Times, The Guardian, and FiveThirtyEight. Brilliant has also been cited by The Atlantic as a catalyst of the "math revolution" - a surge in the number of American teens excelling at math.
In 2013, Brilliant co-founder and CEO Sue Khim was listed among the Forbes 30 under 30 for the Education category for her work on Brilliant.
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