sutter-hill-ventures
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Cspeed
Cspeed is a Palo Alto optical semiconductor startup building silicon photonics and high-density III-V laser array technology to replace copper interconnects inside large-scale AI clusters. Founded in 2022 and led by serial semiconductor entrepreneur Sanjai Kohli, the company targets the data-movement bottlenecks that limit 'scale-up' AI infrastructure, aiming to deliver fiber-optic connectivity dense and cheap enough for high-volume datacenter deployment.
Ridge Bio
Ridge Biotechnologies is a Bay Area startup using AI-driven enzyme and targeted drug design to build the next generation of precision medicines. Its platform pairs proprietary machine learning models with high-throughput, cell-free wet-lab experimentation to design enzymes and delivery systems for applications spanning antibody-drug conjugates, in vivo CAR-T, targeted nucleic acid delivery, biocatalysis and radiotherapies. The company emerged from stealth in September 2025 with an oversubscribed $25 million seed round led by Sutter Hill Ventures.