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Kara

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Making diamond an engineering material

S26·Summer 2026·Industrials·San Francisco, CA, USA·Team of 3

About

We grow high-purity diamond wafers for advanced hardware. Used in aircraft, spacecraft, RF electronics, power devices, and lasers, our diamond moves heat up to 5× better than copper, helping critical systems run cooler, faster, and more reliably. Diamond has spent centuries as a symbol. We are turning it into infrastructure.

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Kara · YC S26 · YC Watcher