“Over the last eight years, Silbermann has quietly built Pinterest into a global brand with 250 million active users. And while the company is private and keeps financials to itself, CNBC reported in July that Pinterest may hit $1 billion in ad revenue this year, and in September the New York Times reported that number will be closer to $700 million, and that the company has a valuation of $12.3 billion.

Silbermann’s journey to Pinterest started when he was still working at Google in 2007, and his friend Paul Sciarra asked if he wanted to explore making software for the newly released iPhone.”

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