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International Business Times UK
International Business Times UK
Will Lorca

OpenAI CEO Sam Altman Criticised Slack's 'Fake Work'—Then Hired Its CEO as Revenue Lead

Sam Altman OpenAI Slack Denise Dresser Microsoft Elon Musk Salesforce Google
Denise Dresser served as CEO of Slack and spent over a decade at Salesforce before joining OpenAI in December 2025. (Credit: OpenAI)

Sam Altman, CEO of OpenAI, publicly criticised Slack for producing what he described as 'fake work' in a November video—yet less than a month later, he appointed Slack's chief executive to head OpenAI's enterprise sales.

Denise Dresser, who had been CEO of Slack since late 2023, now faces the formidable task of transforming OpenAI's 3 million business subscribers into a multibillion-pound revenue stream. But Slack wasn't Altman's only target.

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