Which mathematics software/tool company reached a $1 billion valuation the fastest, revolutionizing how math is taught in schools and universities?

In the world of mathematics education and professional tools, certain companies have revolutionized how we learn and apply mathematical concepts. From basic calculators to advanced computational software, these tools shape how mathematics is taught, learned, and practiced. This poll explores the market dominance and product development strategies in the mathematical tools industry, revealing which company has achieved the most remarkable brand value through innovation and market penetration.

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Desmos (the online graphing calculator company)
Wolfram Alpha (computational intelligence engine)
Chegg (originally a textbook rental company that expanded to math solutions)
GeoGebra (interactive geometry, algebra, and calculus application)