The sci-fi fantasy kid who built a $1.26b start-up
by Euan Black · Australian Financial ReviewEuan BlackHealth and wellness reporter
Oct 26, 2026 – 4.50am
Thomas Kelly grew up reading science fiction novels about a world in which super-intelligent machines and humans peacefully co-exist. He’s now doing his part to make that vision a reality.
Kelly, 33, is the co-founder and chief executive of Heidi, a health tech start-up that uses AI to make doctors more productive. In September, the company raised $140 million at a valuation of $1.26 billion. Kelly, with an estimated personal fortune of $169 million, debuts on this year’s Young Rich List in 45th place.
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Euan BlackHealth and wellness reporterEuan Black is the health and wellness reporter at The Australian Financial Review. He was the work and careers reporter. Email Euan at euan.black@afr.com
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