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Is Marvell Buying the Future or Raising the Table Stakes for CPO Warfare?
Marvell's aggressive acquisition of Celestial AI aims to deliver an all-optical scale-up interconnect; positions Marvell’s UALink strategy directly against NVIDIA's proprietary NVLink; sets stage for inevitable conflict with Broadcom and other incumbents.
12/04/2025
Key Highlights:
- Marvell announced an agreement to acquire Celestial AI with technologies that accelerate optical connectivity for next-generation AI and cloud data centers.
- Celestial AI’s Photonic Fabric is designed to enable all-optical connections within the rack and system, breaking the power wall of copper interconnects.
- The integrated solution is designed to deliver an unprecedented 16 Tbps bandwidth chiplet with superior power and thermal efficiency.
- The $3.25 billion upfront deal (potential for $5.5B on earnouts) represents Marvell's aggressive counter-positioning against proprietary Co-Packaged Optics (CPO) ecosystems led by NVIDIA and Broadcom.
- A newly announced commercial alignment, including a warrant issuance to AWS parent Amazon, validates the technology’s readiness for massive-scale hyperscaler deployment.
The News
Marvell Technology, Inc. has entered into a definitive agreement to acquire Celestial AI, a provider of a disruptive Photonic Fabric technology platform purpose-built for scale-up optical interconnect. This strategic action is designed to accelerate Marvell's connectivity strategy by addressing the bandwidth, latency, and power constraints of next-generation multi-rack AI systems. The combination aims to deliver an innovative optical solution by pairing Marvell’s UALink scale-up switch roadmap with Celestial AI’s breakthrough photonic chiplet technology. The first-generation Photonic Fabric chiplet is architected to deliver 16 terabits per second of bandwidth, ten times the capacity of current state-of-the-art scale-out ports, positioning Marvell to lead the all-optical transition within the system. Find out more: https://investor.marvell.com/news-events/press-releases/detail/1000/marvell-to-acquire-celestial-ai-accelerating-scale-up-connectivity-for-next-generation-data-centers
Analyst Take
We observe an increasing pressure within the AI infrastructure ecosystem as the physics of Moore's Law confronts the economic reality of AI acceleration. Copper is dead. Or at least, it needs to be. The simple truth is that copper interconnects cannot handle the power, reach, and thermal requirements of the near-future multi-rack AI clusters built by hyperscalers. Future data centers require a fundamental architectural reset - but the pace has been like Hemingway’s going broke, it happens gradually and then all at once. Marvell’s acquisition of Celestial AI, with an upfront valuation of approximately $3.25 billion, signals that the company is willing to make a massive, transformative bet to own the new physical layer. In this market moment, bold moves are necessary. But the aggressive milestones in the full deal indicate that Marvell expects significant contributions to revenue as the technology takes hold in the market.
Our analysis suggests that Marvell is fundamentally recalibrating its core Digital Signal Processor (DSP) and switch business model around photonics as the new primary data path. This is a critical pivot away from optimizing existing electronic components toward defining the future of data movement itself. It is a big move after the company’s partnership with NVIDIA around their NVLink technology back in May and demonstrates how fast momentum is building. Our contrarian observation is that the size of this deal might not reflect Celestial AI’s current revenue or product maturity, but rather hedging against the prohibitive cost if a company like Marvell fails to dominate the Co-Packaged Optics (CPO) market against well-funded rivals.
What Was Announced
The core of the announcement rests on Celestial AI’s Photonic Fabric, a platform designed to solve the scale-up problem in AI systems. The technical imperative here is to enable direct, low-latency communication between hundreds of XPUs (accelerated processors), allowing each XPU to access the memory of every other XPU across multiple racks. The Photonic Fabric chiplet aims to deliver an unprecedented 16 terabits per second of bandwidth in a compact form factor. This capability is architected to provide over two times the power efficiency of electrical copper interconnects, while significantly increasing signal reach.
A key technical feature is the thermal stability of the Photonic Fabric. This stability is designed to allow the photonic chiplet to be co-packaged directly with high-power XPUs and scale-up switches in a 3D package. This deep integration is crucial, as it avoids using highly valuable die edge “beachfront” for external connections, allowing that space to be repurposed to significantly increase the amount of High Bandwidth Memory (HBM) within the XPU package. This integrated optical approach is specifically intended to accelerate Marvell's UALink scale-up switch roadmap, creating a complete, high-speed solution for next-generation systems. Furthermore, the technology platform is designed with future applications in mind, including pooled memory appliances and optical replacements for traditional electrical die-to-die connections in multi-die packages.
Market Analysis
The timing and aggressive nature of this transaction place Marvell squarely in the emerging battle for control of AI infrastructure’s physical layer. The global optical interconnect market is exploding, and as with many other industries in tech, it is driven by AI workloads and the massive investment in AI infrastructure. Analyst projections suggest this market, approximately $16 billion in 2024, is poised to nearly double to over $34 billion by 2030. The fastest growth is expected in the data communication segment, exactly where this acquisition puts Marvell.
Marvell is executing a distinct strategy in this competitive environment, one defined by the tension between open and proprietary ecosystems. The industry is currently divided: on one side, you have the closed, integrated systems championed by both NVIDIA (with its proprietary NVLink fabric) and the incumbent switch silicon leader, Broadcom. Broadcom, with its Tomahawk switch ASICs and Bailly CPO Platform, emphasizes an end-to-end proprietary strategy for high-volume customers.
Marvell, which we often characterize as the "Android" alternative, is making this acquisition the physical layer anchor for the UALink Consortium. This initiative, backed by giants such as AMD, AWS, and Google, is designed to establish an open standard for accelerator-to-accelerator connectivity, directly challenging the proprietary control NVIDIA has traditionally exerted over the AI cluster fabric. By acquiring Celestial AI, Marvell positions itself as the key enabler - the essential silicon partner - for the entire UALink ecosystem. The explicit endorsement and commercial alignment with AWS, including a warrant for Amazon to purchase Marvell shares tied to Celestial AI product purchases through 2030, is a powerful market signal. This validates the technology’s industrial readiness and anchors Marvell’s bold revenue projections: $500 million run rate by Q4 Fiscal 2028, doubling to a $1 billion run rate by Q4 Fiscal 2029. The acquisition is a strategic move to leapfrog legacy interconnect technologies and capture a premium position in the high-growth scale-up market for the next decade.
Looking Ahead
The key trend we'll be monitoring is the bifurcation of the CPO supply chain. The industry is rapidly moving past legacy Data Center Interconnect (DCI) solutions and toward deeply integrated, high-density CPO solutions. This momentum forces hyperscaler executives to make long-term, multi-billion-dollar bets on technologies in the foundational fabric of AI. Their choices are clear at the outset consisting of the integrated, proprietary ecosystems offered by NVIDIA and Broadcom, versus the more open, flexible UALink/Marvell path. This Marvell acquisition strengthens the open alternative, ensuring competition remains fierce at the physical layer. The industry needs to develop robust, standardized protocols for optical memory pooling, which Celestial AI's platform is designed to enable next.
Bottom line: hyperscalers are staring at 120-150 kW per rack power ceilings that are already largely absorbed by the XPUs alone. The side that delivers rack-scale 16 Tbps optical interconnects at <1 pJ/bit and <50 W per engine is set to win the next decade of AI infrastructure. Celestial AI is Marvell’s bid that they - not NVIDIA, not Broadcom - will own that power envelope. The technical success of integrating photonics into 3D-stacked XPUs will dictate the winners in the coming years. Failure is not an option for hyperscalers who must manage power and thermal budgets that are quickly reaching existential limits.
Through acquiring Celestial AI, we anticipate that Marvell can improve its competitiveness and ecosystem influence over the next 12 months by aggressively integrating the Photonic Fabric chiplet into its UALink switch roadmap, creating the industry's first all-optical scale-up interconnect platform designed specifically for massive multi-rack AI clusters. This synergy immediately positions Marvell to address the critical bandwidth, latency, and power bottlenecks that are currently limiting competitors like NVIDIA (with its proprietary InfiniBand/NVLink) and Broadcom in next-generation AI systems, since the 16 Tbps optical solution offers a 10x capacity advantage over current state-of-the-art ports.
To maximize influence, Marvell must secure early design wins with major hyperscalers for their custom AI silicon programs, leveraging the acquisition to pitch a complete, high-performance connectivity stack that moves data between accelerators far more efficiently than copper-based alternatives, ultimately cementing Marvell's role as the key enabler for scale-up AI infrastructure.
Stephen Sopko | Analyst-in-Residence – Semiconductors & Deep Tech
Stephen Sopko is an Analyst-in-Residence specializing in semiconductors and the deep technologies powering today’s innovation ecosystem. With decades of executive experience spanning Fortune 100, government, and startups, he provides actionable insights by connecting market trends and cutting-edge technologies to business outcomes.
Stephen’s expertise in analyzing the entire buyer’s journey, from technology acquisition to implementation, was refined during his tenure as co-founder and COO of Palisade Compliance, where he helped Fortune 500 clients optimize technology investments. His ability to identify opportunities at the intersection of semiconductors, emerging technologies, and enterprise needs makes him a sought-after advisor to stakeholders navigating complex decisions.
Ron Westfall | VP and Practice Leader for Infrastructure and Networking
Ron Westfall is a prominent analyst figure in technology and business transformation. Recognized as a Top 20 Analyst by AR Insights and a Tech Target contributor, his insights are featured in major media such as CNBC, Schwab Network, and NMG Media.
His expertise covers transformative fields such as Hybrid Cloud, AI Networking, Security Infrastructure, Edge Cloud Computing, Wireline/Wireless Connectivity, and 5G-IoT. Ron bridges the gap between C-suite strategic goals and the practical needs of end users and partners, driving technology ROI for leading organizations.