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Slack CEO and co-founder Stewart Butterfield is leaving Salesforce in January, reports Business Insider. Butterfield helped co-found Slack in 2013 after Glitch — a social MMORPG — was shut down and Butterfield turned his focus to workplace communication tools instead. Butterfield is leaving Salesforce, the company that acquired Slack for $27.7 billion last year, after less than two ye...
