EnglishFidji Simo is on Twitter (X) as @fidjissimo, with 699,639 followers and 1,752 posts. It has been on X since May 2007, an account age of 19 years.
Insights
Its strongest tracked day added +1,976 followers on Jun 24, 2026.
Engagement
Early reading. We have captured 3 original posts for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.
A typical post picks up 223 interactions against 700K followers, an engagement rate of 0.032%. Posts are seen about 49K times each, and 0.455% of those impressions turn into an interaction. That is about 7.01% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.27 posts a day over the last 30 days, though only 17% of days saw any activity at all.
Measured over 3 original posts from a 30-day window, last computed on October 7, 2026.
Full engagement reportFollower growth
Best tracked day: +2.0K followers on 2026-06-24.
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Bio
CEO of Applications, OpenAI
Notable followers
The biggest accounts in our directory following @fidjissimo.
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Fidji Simo on Twitter (X) - frequently asked questions
- What is the Twitter handle for Fidji Simo?
- Fidji Simo posts on Twitter (X) as @fidjissimo. The profile is at x.com/fidjissimo, and the View on X button at the top of this page opens it.
- How many followers does Fidji Simo have on Twitter?
- Fidji Simo (@fidjissimo) has 699,639 followers on Twitter (X). The count is refreshed continuously from public data.
- When did Fidji Simo join Twitter?
- Fidji Simo joined Twitter (X) in May 2007. The @fidjissimo account is 19 years old. Searches for Fidji Simo age often mean a personal age, which we do not publish. The figure here is the account age only.