Fidji Simo (@fidjissimo) — Twitter Score 148 out of 1000

Fidji Simo is a consumer technology executive who serves as CEO of Applications at OpenAI, overseeing the company's applications business and reporting directly to Sam Altman. Fidji Simo's Twitter Score is 148 out of 1000 (an Excellent rating) as of September 2026, ranking #3,808 (top 1%) among 486,860 tracked accounts.

Fidji Simo joined OpenAI first as a member of its Board of Directors in March 2024, then was appointed CEO of Applications in May 2025. Previously, she served as CEO and Chair of Instacart, where she led the company through its 2023 IPO before departing for her current role at OpenAI. Before Instacart, she previously worked at the Facebook app, where she led the product and oversaw areas including News Feed, Stories, Groups, Video, Marketplace, Gaming, News, Dating, and Ads.

Fidji Simo founded Metrodora Institute and serves as President of Metrodora Foundation. She also co-founded Women in Product and co-founded ChronicleBio. She is a member of the Board of Directors of Shopify. Fidji Simo's account has published 1,725 posts and has 651,932 followers as of September 2026. She has been mentioned by 125 accounts, with 237 total mentions.

Who follows Fidji Simo on X?

The accounts that follow Fidji Simo include 581 founders, 188 angel investors, 93 influencers and 7 VCs, among them Sam Altman, Marc Andreessen, 6529, Udi Wertheimer, Garry Tan and Jesse Powell.