Fractile raises $720M Series C at $7B valuation to build AI inference chips with stacked DRAM

Fractile says its first product-scale chip will be manufactured next year, stacking DRAM directly on top of the processor. The company argues current AI chips force tradeoffs between efficiency and speed, citing HBM's limited bandwidth and SRAM's insufficient capacity for long-context models. The $720M Series C was led by Thrive Capital, Founders Fund, Lightspeed and Redpoint, with additional new and existing investors participating. Fractile describes itself as a chip-first frontier AI company and is hiring.

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