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Stewart Butterfield

CEO, Slack | Vancouver, Canada

Connected to: Caterina Fake

Stewart Butterfield is a Canadian entrepreneur who cofounded and helms the team messaging app Slack. He also founded the photo-sharing website Flickr, which was acquired by Yahoo in 2005. Two years after its public launch in early 2014, Slack boasted more 30,000 teams as users and a valuation of more than $1 billion. And Slack isn't just celebrating exponential growth: Butterfield's company is being touted as the end of the email era.

Stewart Butterfield on the Web

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