Celestial AI just raised $255 million to speed up how machines think. Data doesn’t crawl anymore. It doesn’t walk. It doesn’t even run. Thanks to silicon photonics, it flies, on beams of light through a tech stack that sounds more like a sci-fi blueprint than a semiconductor play. But this isn’t fiction. This is business. And Celestial AI just turned their Series C1 round into a masterclass in momentum.
Founded in 2020 by David Lazovsky and Preet Virk, two heavyweights who’ve spent decades in the trenches of silicon, optics, and systems architecture, Celestial AI was born from one relentless idea: move data the way nature intended, at the speed of light. Lazovsky, with his roots at Rockley Photonics and Intel, brings the vision and voltage. Virk, the analog assassin from Marvell and Broadcom, builds what others thought wasn’t buildable. They saw copper gasping under the weight of AI-scale data movement and answered with PhotonicFabric™, a platform that swaps out wires for waveguides and dumps bottlenecks like last year’s chipset.
This isn’t another chip company raising another round. This is a calculated strike at the bandwidth, latency, and energy-efficiency choke points throttling AI infrastructure. And investors noticed. VentureTech Alliance and Samsung Catalyst Fund led the charge, with power moves from Fidelity, BlackRock, Koch Disruptive Technologies, Tiger Global, Temasek, Porsche SE, The Engine Ventures, AMD Ventures, and a strategic chorus that includes IMEC XPand and Penguin Solutions. When your cap table reads like the guest list at Davos for deep tech, you’re not just in the conversation, you’re driving it.
The numbers back it up: $520 million raised in just over three years. A post-money valuation of $2.5 billion. 200 global patents (and counting). Volume manufacturing qualified with TSMC. A hyperscaler customer pipeline that’s as quiet as it is serious. And yes, they acquired Rockley Photonics’ IP stash last fall, because if you’re going to change how data flows, you better own the current.
Now, with PFLink™ and PFSwitch™ shipping and next-gen modules on deck, complete with optical HBM attachments and rack-scale compute offloads, Celestial AI isn’t selling components. They’re selling future-proofing. Their tech doesn’t just move data faster. It makes the cloud denser, the edge smarter, and AI clusters more intelligent by design.
