Larry Page, Google's cofounder. Getty / Justin Sullivan Almost one-fourth of the 50 richest people on earth made their extraordinary fortunes founding and building today's largest tech companies.

Together, the 13 billionaires have a net worth of about $450 billion. That includes Microsoft visionary Bill Gates, the richest person on earth with a fortune of $87.4 billion, and Amazon founder Jeff Bezos, the richest tech CEO in the world with a fortune of $56.6 billion.

This comes from new data provided to Business Insider by Wealth-X, a company that conducts research on the super-wealthy. Wealth-X maintains a database of dossiers on more than 110,000 ultra-high-net-worth people, using a proprietary valuation model to discern the size of their fortunes.

Although the American tech scene is home to the most billionaires on our list — nine of the top 50 — the emerging economies in China and India are starting to churn out enormously rich tech moguls of their own.

Read on to learn about the richest tech titans in the world.