Stealth startup Kepler Computing raises $468M for EUV-free HBM alternative using 3D ferroelectric stacking

Promptmethus · x · 2026-09-10

Kepler Computing has come out of stealth after 7 years building an HBM alternative that doesn't need EUV. Instead of shrinking transistors with expensive tools, it stacks chips in 3D and uses a ferroelectric material for denser, lower-power storage in older fabs — claiming SRAM-like data movement with more capacity than today's HBM.

Key facts:

Team co-led one of the industry's first 3D chip-stacking technologies and scaled seven generations of DRAM.
Raised $468M from Intel Capital, AMD Ventures, GlobalFoundries, Gates, with up to $245M in US government backing.
Sampling this year, production next year.

As memory becomes the biggest constraint on AI compute, Kepler bets physics and materials can leapfrog the industry's EUV + mega-fab playbook — though significant uncertainty remains.

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Stealth startup Kepler Computing raises $468M for EUV-free HBM alternative using 3D ferroelectric stacking

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