Kara (YC S26)

Making Diamond Engineerable.

[Kara (YC S26) @KaraLabsAI]

Today we are excited to launch Kara, backed by @ycombinator (S26).

We grow ultra-high-purity diamond wafers for AI chips, spacecraft, RF systems, lasers, and quantum hardware.

Diamond can move heat 5× faster than copper, helping the world’s most power-dense systems run harder and cooler.

But thermal management is only the beginning.

Silicon transformed computing when we learned to manufacture it with extreme purity and control. Kara is doing the same with diamond.

Today, our ultra-high-purity diamond pulls heat away from silicon chips. Tomorrow, Kara’s control over purity and defects unlocks diamond as the ultimate semiconductor.

Kara is building the diamond age.

@AarinJhaveri @Arjun_Lak @Anuveer_Chadha

[Aarin Jhaveri @AarinJhaveri]

There are very few people who can understand a startup as quickly and deeply as Paul Graham.

We spent today morning walking through Kara together, and he completely sharpened how we think about the company. One of the most curious and humble people I’ve met. Thanks for having us over @paulg!

[Kara (YC S26) @KaraLabsAI]

@formerlypeter @amolhpant @shauryaagg No way companies are still using fax

[Allen Naliath @AllenNaliath]

Friday is no more. We spent $150K to buy @FreestyleDotAI

Today we launch the most powerful email memory system in the world.

With it, I handled a week's worth of email without typing a word.

All within native Gmail. Email is solved. Reply for access.

[Kara (YC S26) @KaraLabsAI]

@shauryaagg @florin_hq @amolhpant @formerlypeter Let’s gooo! Congrats on this sounds very interesting

[Kara (YC S26) @KaraLabsAI]

@imtomcurry 😭😭

[Kara (YC S26) @KaraLabsAI]

@aiseomastery @ycombinator It’s critical.

[Kara (YC S26) @KaraLabsAI]

Today we are excited to launch Kara, backed by @ycombinator (S26).

We grow ultra-high-purity diamond wafers for AI chips, spacecraft, RF systems, lasers, and quantum hardware.

Diamond can move heat 5× faster than copper, helping the world’s most power-dense systems run harder and cooler.

But thermal management is only the beginning.

Silicon transformed computing when we learned to manufacture it with extreme purity and control. Kara is doing the same with diamond.

Today, our ultra-high-purity diamond pulls heat away from silicon chips. Tomorrow, Kara’s control over purity and defects unlocks diamond as the ultimate semiconductor.

Kara is building the diamond age.

@AarinJhaveri @Arjun_Lak @Anuveer_Chadha

[Kara (YC S26) @KaraLabsAI]

@bradflora best partners best team

[Kara (YC S26) @KaraLabsAI]

@namanambavi Thanks, Naman!

[Kara (YC S26) @KaraLabsAI]

Today we are excited to launch Kara, backed by @ycombinator (S26).

We grow ultra-high-purity diamond wafers for AI chips, spacecraft, RF systems, lasers, and quantum hardware.

Diamond can move heat 5× faster than copper, helping the world’s most power-dense systems run harder and cooler.

But thermal management is only the beginning.

Silicon transformed computing when we learned to manufacture it with extreme purity and control. Kara is doing the same with diamond.

Today, our ultra-high-purity diamond pulls heat away from silicon chips. Tomorrow, Kara’s control over purity and defects unlocks diamond as the ultimate semiconductor.

Kara is building the diamond age.

@AarinJhaveri @Arjun_Lak @Anuveer_Chadha

[Christina Gilbert @ChristinaG325]

A fifth-generation diamond jeweler teamed up with two Berkeley materials engineers to make industrial diamonds. Hard to think of a better-matched team for this problem. And they've figured out how to make diamond wafers that move heat 5x better than copper.

[Brad Flora @bradflora]

Introducing Kara, the S26 startup with arguably the tightest founder-market fit of any company I've worked with.
It turns out, diamonds have awesome scientific and industrial use cases but sourcing diamond parts is a mess right now. The Kara team consists of: A fifth-generation diamantaire (whose name translates to "jeweler"), a chemical engineer who did diamond quantum sensing at Berkeley Lab, and an ML engineer — three best friends growing and machining diamonds into actual parts. Hard to think of a better team to lead us into the diamond age.