YC Summer 2026 (S26) company

Kara

Making diamond an engineering material

About Kara

We grow high-purity diamond wafers for advanced hardware. Used in data centers, 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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