As Slack Prepares to Go Public, Its C.E.O. Is Holding His Tongue
SAN FRANCISCO — Stewart Butterfield, chief executive of the workplace collaboration app Slack, once offended Robert De Niro at an awards event with an irreverent comment, prompting the actor to curse at him from the stage. On another occasion, Mr. Butterfield bought a snarky full-page newspaper ad to taunt a rival, Microsoft. And he has […]
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