Fidji Simo
CEO of Applications, OpenAI
Fidji Simo is the CEO of Applications at OpenAI, overseeing the company's product and business operations. She joined in 2025 from Instacart, where she was chief executive, bringing consumer-scale product leadership to OpenAI.
Notable for
Simo, who grew up in France, built her career at Facebook, where she rose to lead the Facebook app and its video and monetization products over roughly a decade. She became CEO of the grocery-delivery company Instacart in 2021 and led it through its public listing.
In 2025 she joined OpenAI in the newly created role of CEO of Applications, reporting to Sam Altman and taking responsibility for turning OpenAI's research into products and a sustainable business — spanning ChatGPT's consumer and enterprise offerings and the broader application portfolio.
Her appointment reflected OpenAI's shift from a research lab into a large-scale product and commercial organization, letting Altman focus on infrastructure, research, and strategy while Simo runs the applications side at consumer scale.
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