Mantis is a digital twin company that combines LLMs with high-fidelity physics simulations in order to convert rare and difficult-to-access human behavior data into predictive models.
Mantis is a Y Combinator company in the Winter 2026 batch. Its directory entry describes it as: Digital Twins of humans. The founder listed is Georgia Witchel (Founder/CEO) (Y Combinator directory entry, December 19, 2025).
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New accelerator entry · 2025-12-19 · the record
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Mantis is a digital twin company that combines LLMs with high-fidelity physics simulations in order to convert rare and difficult-to-access human behavior data into predictive models.
Checked away from the directory entry. Neither line below comes from the company's Y Combinator page.
Mantis builds the infrastructure layer for living, predictive models of individual human beings — forecast to the horizon where a decision still has to be made. Starting with medicine.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Counted only where a thread links to this company's own site, announces it by name on that forum, or names it beside its own Y Combinator batch. A thread whose title merely carries the words is not counted — a name is not an identifier. More may exist than the one page of results read here. Hacker News is not us, and nothing above is our opinion of the company.
I'm an Ex-elite ice climber turned repeat computer science / biomedical founder. After bringing climbing to an Olympic stage (Lilihammer 2016), breaking 8 world records, and developing the sport of ice climbing, I dropped out of high school, got a degree in CS from Harvey Mudd, was a founding engineer for a sports tech company, founded a YC company (Louiza Labs), and earned a master's in Bioengineering.
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Example from a real report (our sample on Target): “Target eliminated approximately 1,800 corporate positions, with around 1,000 employees receiving layoff notices and the remainder accounted for by eliminating open roles.” Source: NBC News
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