IIF Certified Assessment
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IIF Certified Assessment
Founders, executives and inventors — the people whose intelligence gets talked about most, and measured least.
Each entry opens onto the full story behind the figure.
Portrait © Matthew Yohe, CC BY-SA 3.0. The background-removed portrait above is a derivative work and is likewise offered under the same licence. · Portrait © Debbie Rowe / The Royal Society, CC BY-SA 3.0. The background-removed portrait above is a derivative work and is likewise offered under the same licence. · Portrait by Christopher Smith, U.S. Department of Health and Human Services — a work of the U.S. federal government, public domain. Background removed for the portrait above. · Portrait by Los Angeles Air Force Base, Space and Missile Systems Center — a work of the U.S. federal government, public domain. Background removed for the portrait above. · Portrait by Jeff Sainlar, CC BY-SA 4.0. Background removed for the portrait above. · Photograph by the USA International Trade Administration (2015), public domain. Background removed for the portrait above. · Photograph by Gage Skidmore (2017), CC BY-SA 2.0. Background removed for the portrait above.
More profiles are on the way. A name joins this category once its figure has been traced and a properly licensed portrait is cleared.
Get a measured score first — then the comparison actually means something. Thirty questions, instant result.
Start the test →Not by testing anyone. Each figure on this page is inferred from the documented record — published work, contemporary accounts, verified qualifications — using a named method set out under how we read a number. Every profile shows its own workings.
Steve Wozniak holds the highest estimate in this category at 150–165. That ordering comes from the midpoint of each range and it re-sorts itself as profiles are added, so treat it as a convenience rather than a verdict. The full leaderboard ranks every category together.
7 so far, and the list grows as figures are traced and portraits licensed. Browse the rest of the section from all categories, or start at the Celebrity IQ hub.
Get a measured number first. The IQ Metrics assessment is 30 questions and reports on the same 100-mean scale used on every profile here, with a percentile and an ability breakdown. How we score and norm it explains the benchmarking, and average IQ by country shows how the same scale looks across populations.
Your score, your percentile, your ability breakdown and a printable IIF certificate.
Find your IQ score now! →The assessment costs nothing and you always get a real result. Upgrades add precision, analysis and a certificate — never access to the test itself.
Whatever you paid comes off the next tier for 30 days. Start small without losing the money.
Not what you expected? Full refund, no questions, no form to hunt for.
Prices adjust to your country automatically, so the certificate is reachable outside high-income markets.
Coming later: an annual membership (~$89/year) for unlimited retests, practice sets and progress tracking. Monthly billing is deliberately not offered — a once-a-year assessment does not justify a monthly charge, and it would churn.
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