By Saf Malik | Senior Content and Insights Manager
Published: September 10, 2026
Executive Overview
For two decades, the blueprint for subsea cable construction remained a predictable, cooperative routine: an international consortium of telecommunications operators would pool capital, hedge risks, and split transmission capacity along a newly engineered transoceanic route. Content providers, cloud architects, and early internet platforms bought space on these legacy infrastructure lines as commercial customers.
Today, that decades-old model is fracturing. Tech industry heavyweights—Amazon Web Services (AWS), Microsoft, Google, and Meta—are increasingly bypassing consortia altogether, choosing instead to own, finance, and operate submarine cables outright.
This historic shift from cooperative leasing to absolute infrastructure ownership is about far more than raw bandwidth. It represents a fundamental recalibration of how hyperscale cloud providers view network resilience, supply chain control, and geopolitical risk. Driven by the voracious data demands of the artificial intelligence boom, these four companies are no longer content to sit in the passenger seat of global connectivity. They are building their own highways across the ocean floor.
Detailed Chronology: The Evolution of Hyperscale Subsea Ownership
To understand how the subsea cable landscape reached this inflection point, one must trace the rapid evolution from shared risk to solo supremacy.
Google and Meta: The Trailblazers
While AWS and Microsoft are currently dominating headlines with their latest solo announcements, Google and Meta laid the groundwork years ago.
- 2019 (Google): Google broke the mold by commissioning Curie, its first fully private submarine cable linking California to Chile. This proved that a single non-telecom entity could successfully manage the immense logistical, financial, and regulatory hurdles of transoceanic construction. Google followed this with Dunant (Virginia to France), Equiano (Portugal to Africa), and Nuvem (South Carolina, Bermuda, and Portugal), confirming its role as the sole funder of these massive undertakings.
- 2021–2025 (Meta): While maintaining historical stakes in more than 20 consortium systems—including 2Africa and Havhingsten (connecting Ireland to the Nordics and the UK)—Meta dramatically escalated its ambitions. In February 2025, Meta announced Project Waterworth, a staggering solo commitment spanning more than 50,000 kilometers across five continents. Featuring landing points in the US, India, Brazil, and South Africa, it stands as the longest subsea cable project ever attempted by a single entity.
AWS Goes Solo: The Fastnet Project
By late 2025, AWS signaled a definitive break from its legacy strategy of joining consortium builds like Jupiter, Havfrue, Marea, and Bifrost.
In November 2025, AWS unveiled Fastnet, its first wholly-owned transatlantic cable. Scheduled to enter service in 2028, the system is engineered to deliver an astronomical 320 terabits per second (Tbps) of capacity across 16 fiber pairs.
Fastnet broke new ground in two distinct ways:
- Ownership Structure: It marks AWS’s transition from a participant in shared builds to a sole-owner operator.
- Geographic Divergence: Rather than routing through the heavily congested Dublin, Mayo, or Galway corridors, Fastnet will become the first transatlantic cable to land on Maryland’s Eastern Shore in the United States and County Cork in Ireland.
AWS explicitly designed these unusual landing points around structural resilience. By avoiding traditional, crowded pathways, the company is providing its enterprise cloud customers with an alternative data highway immune to localized choke points or single-point failures on busier routes. Technologically, the cable will be buried approximately 1.5 meters beneath the seabed, reinforced with specialized armoring near the shore to withstand environmental hazards and accidental anchor strikes. Separately, AWS retains a stake in the Beaufort cable—developed alongside Vodafone—which will also land in Ireland and Wales upon completion.
Microsoft’s Expansion Across the Irish Sea
Microsoft has mirrored this strategic pivot toward bespoke, direct infrastructure investments, focusing heavily on the vital digital corridor connecting Ireland and the United Kingdom.
Regulatory filings submitted to Ireland’s Maritime Area Regulatory Authority (MARA) revealed three planned Microsoft systems connecting Ireland to Wales:
- Tuskar: Spanning from Kilmore Quay to Newgale, Pembrokeshire.
- SOBR1: Linking Dublin Bay to Anglesey.
- SOBR2: Connecting Portmarnock/Malahide to Abergele.
Though these filings were quietly lodged in 2024, they gained widespread industry attention recently as Microsoft initiated geophysical surveys along the proposed routes. Historically, Microsoft invested in transatlantic and transpacific capacity through partnerships with carriers like Hibernia and Aqua Comms, bridging its North American data centers through Ireland into the UK. These new MARA filings, however, position Microsoft as a direct maritime infrastructure investor rather than an end-user capacity purchaser.
It is worth noting that hyperscalers are not moving at an identical pace. As of late 2025, Microsoft remains primarily an anchor-tenant investor in several third-party systems, and its Ireland-Wales initiatives are currently at the marine survey stage—a significantly earlier development phase than AWS’s confirmed, fully-funded Fastnet construction. Nonetheless, the trajectory is clear: all four major cloud providers are steadily migrating toward unilateral infrastructure control.
Supporting Context & Metrics: The Forces Behind the Build-Out
The simultaneous migration of AWS, Microsoft, Google, and Meta toward private subsea cables is driven by the convergence of three powerful industry forces.
1. The Artificial Intelligence Traffic Explosion
The explosive growth of generative AI, large language model (LLM) training, and real-time inference workloads has fundamentally changed data gravity. Data centers are no longer just storing enterprise files; they are constantly shifting massive petabyte-scale datasets across international borders for distributed model training. Consortion-shared bandwidth allocations, which once satisfied enterprise cloud needs for years, are now exhausted in months. Hyperscalers need guaranteed, uncontested pathways with zero latency bottlenecks.
2. Supply Chain Scarcity and the Cable Crunch
Demand for high-capacity subsea lines is colliding with a severe physical supply bottleneck. The global fleet of specialized cable-laying and repair vessels is remarkably small, aging, and frequently booked years in advance. Furthermore, the specialized manufacturing base for high-performance optical fiber cables is tightly concentrated among a handful of trusted, Western-aligned suppliers—chiefly SubCom, Alcatel Submarine Networks (ASN), and NEC.
While exact corporate backlog figures are fiercely guarded trade secrets, industry analysts report that manufacturer order books are stretched out for years. This persistent scarcity has removed the luxury of time; waiting for consortium partners to organize, fund, and queue up for manufacturing slots is no longer viable for companies whose capital expenditure is measured in tens of billions of dollars per quarter. Funding and controlling entire systems allows hyperscalers to leapfrog the queue and secure manufacturing priority.
3. Resilience as a Competitive Advantage
In the early days of cloud computing, subsea cables were viewed simply as wholesale pipes. Today, they are viewed as critical national and corporate security assets.
Geopolitical tensions, rising concerns over physical cable tampering in international waters, and accidental disruptions caused by commercial fishing and shipping have elevated network resilience to a board-level priority. By owning their cables, tech giants retain absolute control over routing, landing station security, encryption implementation, and rapid-repair SLAs (Service Level Agreements). If a traditional corridor faces disruption, a private operator can dynamically reroute traffic across its proprietary network without negotiating with consortium partners or third-party carriers.
Official Statements and Industry Perspectives
The structural shift has prompted widespread commentary across the telecommunications and digital infrastructure sectors.
Industry analysts emphasize that while consortium models will not disappear entirely—especially for developing routes where financial risk must be spread across emerging markets—the center of gravity has definitively shifted.
"For years, hyperscalers were simply the largest tenants in a landlord’s building," notes a leading digital infrastructure strategist. "Today, they realize that owning the foundation of the digital economy is the only way to guarantee service availability, insulate themselves from carrier bankruptcies, and support the staggering data requirements of next-generation AI workloads."
Security experts have similarly praised the focus on geographical diversification. AWS’s decision to pioneer the Maryland-to-Cork corridor, alongside Microsoft’s deep-sea surveys in the Irish Sea, highlights a broader industry acknowledgment that digital infrastructure must be decentralized. Spreading landing points away from legacy hubs like New York, Northern Virginia, and Dublin reduces systemic vulnerability to natural disasters, energy grid failures, and geopolitical sabotage.
Future Outlook: What to Watch in Subsea Infrastructure
As the industry looks toward the late 2020s and early 2030s, several critical trends will define the evolution of private subsea cable networks:
- The Battle for Landing Sites: Expect increased competition—and regulatory friction—as hyperscalers scour coastal regions for alternative landing points. Coastal communities and local maritime authorities will face mounting pressure to balance economic development with environmental impact assessments.
- Vessel and Manufacturing Constraints: The bottleneck in cable-laying ships and optical manufacturing will likely persist. Watch for strategic partnerships between tech giants and marine engineering firms, potentially involving direct investments in ship retrofitting or dedicated manufacturing capacity to accelerate deployment timelines.
- Regulatory and Geopolitical Scrutiny: As private companies own increasingly vital elements of global communications infrastructure, national governments will likely subject private subsea cables to more rigorous national security reviews, environmental oversight, and landing license approvals.
- The Role of Consortia in Emerging Markets: While North Atlantic and Transpacific routes are rapidly privatizing, consortia will likely remain the primary vehicle for connecting emerging digital economies in Africa, Latin America, and Southeast Asia, where financial risk-sharing remains necessary.
The era of the shared telecommunications consortium is giving way to an era of corporate subsea sovereignty. For AWS, Microsoft, Google, and Meta, the ocean floor is no longer shared territory—it is the foundational battleground of the AI-driven global cloud economy.
