Sygaldry Raises $139 Million to Build Quantum Computers For AI
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Insider Brief Sygaldry Technologies raised $139 million across Seed and Series A rounds to develop quantum-accelerated AI servers designed to reduce the cost and energy demands of training and running large AI models. The company’s $105 million Series A round was led by Breakthrough Energy Ventures, following a $34 million seed round led by Initialized Capital, with backing from investors including Y Combinator and In-Q-Tel. Sygaldry said its systems are being built to work alongside classical AI infrastructure in data centers while also supporting the development of quantum-native AI methods aimed at improving computing efficiency and performance per watt. PRESS RELEASE — Sygaldry Technologies, Inc. announced today that it has raised $139M in Series A and Seed financing to build quantum-accelerated AI servers. The $105M Series A in March 2026 was led by Breakthrough Energy Ventures, following a $34M seed round led by Initialized Capital. Sygaldry’s servers aim to exponentially speed up critical AI algorithms, reducing the cost and power needed to train and operate increasingly large models. “We’re building quantum computers that meet the specific requirements for AI processing, with the goal of enabling a fundamentally more efficient way of converting megawatts into intelligence,” said Sygaldry CEO and co-founder Chad Rigetti. Demand for more cost- and energy-efficient AI infrastructure is soaring. An estimated $5.2 trillion in capital expenditure is needed by 2030 to meet global demand for AI, including approximately 125 GW of new power generation capacity. “The AI industry is advancing faster than ever and needs a breakthrough in performance per watt,” said Carmichael Roberts at Breakthrough Energy Ventures. “Sygaldry’s vision for bringing quantum directly to the AI data center has the potential to deliver exactly that, bending the cost and energy curve at the moment it matters most.” In addition to Breakthrough Energy Ventures and Initialized Capital, investors include Y Combinator, Rock Yard Ventures, IQT, University of Michigan, QDNL Participations, Expeditions Fund, 468 Capital, Morpheus Ventures, WTI, Overmatch Ventures, RRE Ventures, and Switch Ventures. Sygaldry servers are designed to address constraints in AI training and inference by operating alongside classical infrastructure within the data center. The company is also developing quantum algorithms that plug into the tools AI researchers already use. “We are working at the frontier of quantum and AI simultaneously, because we believe their intersection will define the next era of computing,” said co-founder Michael Keiser. “Our technology will accelerate the classical algorithms AI teams already rely on. In parallel, we are developing entirely new quantum-native approaches to AI that classical systems simply cannot match.” Matt Swayne LinkedIn With a several-decades long background in journalism and communications, Matt Swayne has worked as a science communicator for an R1 university for more than 12 years, specializing in translating high tech and deep tech for the general audience. He has served as a writer, editor and analyst at The Quantum Insider since its inception. In addition to his service as a science communicator, Matt also develops courses to improve the media and communications skills of scientists and has taught courses. matt@thequantuminsider.com Share this article: