Sygaldry Technologies has raised $105M in a Series A led by Breakthrough Energy Ventures, following a $34M seed from Initialized Capital. Its quantum-classical hybrid servers target the $5.2T in AI infrastructure investment projected through 2030.
Sygaldry Technologies, an Ann Arbor-based startup building quantum-accelerated AI servers, has raised $139 million across a $34 million seed round and a $105 million Series A.
The Series A was led by Breakthrough Energy Ventures, the climate and deep technology investment fund, following the seed from Initialized Capital. Additional investors include Y Combinator, Rock Yard Ventures, IQT, the University of Michigan, QDNL Participations, Expeditions Fund, 468 Capital, Morpheus Ventures, WTI, Overmatch Ventures, RRE Ventures, and Switch Ventures.
Sygaldry is led by Chad Rigetti, who co-founded and previously led Rigetti Computing, one of the earliest commercial quantum computing companies, before departing in 2023. The company’s thesis is that the most pressing constraint on AI infrastructure is not raw compute but the cost and energy consumed by that compute.
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An estimated $5.2 trillion in capital expenditure is needed globally by 2030 to meet AI demand, including approximately 125 gigawatts of new power generation capacity.
Sygaldry argues that quantum computing, rather than being a long-horizon replacement for classical silicon, can provide targeted acceleration for the specific AI algorithms that are hardest to run efficiently on classical hardware, operating within data centres alongside, rather than instead of, conventional AI accelerators.
The company’s servers combine multiple qubit types within a single, fault-tolerant architecture, designed to address constraints in both AI training and inference.
Co-founder Michael Keiser, an AI scientist, brings the AI side of the equation, with the company developing both quantum algorithms that plug into existing AI researcher workflows and entirely new quantum-native approaches to AI that classical systems cannot replicate.
Carmichael Roberts of Breakthrough Energy Ventures described Sygaldry’s work as “bending the cost and energy curve at the moment it matters most.” The pilot line facility is expected to build toward commercial engagements with data centre operators and AI platform providers.
