Celestial AI, the visionary company behind the groundbreaking Photonic Fabric optical interconnect technology, has successfully raised $250 million in its Series C1 funding round. Fidelity Management & Research Company led the investment, bringing Celestial AI’s total funding to over $515 million. Other prominent investors, including BlackRock, Maverick Silicon, Tiger Global Management, and Lip-Bu Tan, joined the round. Additionally, existing investors such as AMD Ventures, Koch Disruptive Technologies (KDT), Temasek, Xora Innovation, Porsche Automobil Holding SE, and The Engine Ventures reaffirmed their commitment to the company.

David Lazovsky, CEO of Celestial AI, emphasized the growing demands on AI infrastructure. “With the rise of complex reasoning models and agentic AI, the need for scalable, high-performance AI infrastructure has never been greater. AI processors must seamlessly scale from a few units in a single server to thousands across multiple racks, all while ensuring high-bandwidth and low-latency connectivity for massive data transfers. Celestial AI’s Photonic Fabric is the only technology that can meet these demands while setting new benchmarks for bandwidth, latency, energy efficiency, and total cost of ownership. We are thrilled to partner with world-class investors who share our vision of revolutionizing AI infrastructure.”

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To tackle the evolving AI landscape, Celestial AI has developed the Photonic Fabric technology platform, which enables AI compute networking across processor packages, servers, and multi-rack environments. The company offers a comprehensive suite of products, including connectivity, switching, and packaging solutions that form the backbone of optical scale-up networks for accelerated computing.

Tony Kim, Head of the Fundamental Equities Technology Group at BlackRock, highlighted the significance of Celestial AI’s innovation. “With AI growing at an unprecedented pace, data center infrastructure must keep up. Celestial AI’s Photonic Fabric technology provides a disruptive solution that meets the industry’s escalating demands.”

Andrew Homan, Managing Partner at Maverick Silicon, further elaborated on the platform’s impact. Photonic Fabric is reshaping AI infrastructure with high-speed, low-latency connectivity, smart in-network computing, and advanced memory solutions—paving the way for the next wave of AI innovation. This cutting-edge technology draws upon Celestial AI’s extensive expertise in optical interconnect solutions.”

Designed for seamless integration with industry-standard manufacturing and 2.5D packaging processes, Celestial AI’s Photonic Fabric technology is already gaining traction among hyperscalers, AI processor manufacturers, and custom silicon and packaging partners. With this latest funding, the company plans to expand its operations and scale its volume manufacturing supply chain to meet increasing customer demand.

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Diane Bryant, Independent Director at Celestial AI and Broadcom Inc., underscored the transformative power of the company’s technology. Celestial AI’s Photonic Fabric is revolutionizing AI computing, networking, and memory by tackling key infrastructure challenges with unparalleled performance and energy efficiency. Having witnessed its transformative potential firsthand, I’m proud to support Celestial AI in bringing this groundbreaking platform to market.

FAQs

1. What is Celestial AI’s Photonic Fabric technology?

Celestial AI’s Photonic Fabric technology is an advanced optical interconnect platform that enables high-speed, low-latency communication between AI processors. It enhances computing performance, energy efficiency, and scalability for AI infrastructure.

2. How will the $250 million funding help Celestial AI?

The funding will enable Celestial AI to expand its operations, scale its volume manufacturing supply chain, and strengthen partnerships with hyperscalers, AI processor manufacturers, and packaging providers.

3. Why is Photonic Fabric important for AI infrastructure?

As AI models grow in complexity, the demand for scalable and high-performance computing increases. Photonic Fabric addresses these challenges by providing high-bandwidth, low-latency interconnects that improve AI processing efficiency and reduce total cost of ownership.

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