Spark, Mayfield, and Kleiner Perkins pour another $75M into AI data center chipmaker Retym
Published on: 2025-09-24 20:42:14
Retym, a U.S. chipmaker with Israeli roots, has raised a fresh $75 million series D led by James Kuklinski of Spark Capital. Existing investors — Mayfield’s Navin Chaddha and Kleiner Perkins’ Mamoon Hamid — also participated, bringing its total raised to $180 million, it says.
Retym is another startup benefiting from AI’s glow-up. It’s chips don’t process AI workloads directly — it’s not a Nvidia GPU competitor. It’s working on a new “programmable coherent digital signal processing DSP” chip that allows the innards of data centers to communicate faster both internally and with external sources.
Data centers needed this kind of tech anyway, but the sudden rise of AI has put overwhelming pressure on them to be faster, more efficient, and handle bigger workloads.
The company was founded in 2021 but has been quiet about itself until Monday when it announced this Series D round. Its CTO co-founder Roni El-Bahar published his first blog post on Monday, saying he founded the startup to bri
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