Undersea Cables 2026 — How Big Tech Quietly Took Control of the Internet's Physical Infrastructure
Axis Brief
SubscribeSign in
The Internet Isn't in the Cloud. It's on the Ocean Floor — And Four Companies Just Bought Most of It.<br>About 530 cables carry 99% of the world's data. A dozen chokepoints could break most of them. And the companies that now own the cables aren't telecom companies anymore.
Axis Brief<br>Jun 17, 2026
Share
I'm Victoria — an Economics student and the founder of Axis Brief. Every week I break down one major shift at the intersection of AI and global power through the lens of economics. Not to inform you. To equip you.
“The cloud” is one of the most successful marketing terms in the history of technology. It suggests something weightless, distributed, everywhere and nowhere at once.
The reality is the opposite. Nearly every email, video call, financial transaction, and AI query that crosses an ocean travels through one of approximately 530 fiber optic cables lying on the seafloor — cables that are, in places, narrower than a garden hose. These cables carry an estimated 99% of intercontinental data traffic. Satellites — for all the attention they receive — carry a fraction of a percent.<br>The internet is not a cloud. It is hardware. Specific, physical, geographically located hardware that someone owns, someone built, and someone could damage.<br>Understanding who owns that hardware — and where it’s most vulnerable — is rapidly becoming one of the most consequential economic questions of the AI era.
The Geography That Cannot Be Changed<br>Undersea cables don’t connect continents directly. They funnel through chokepoints — narrow geographic corridors where the physical realities of ocean depth, coastlines, and existing infrastructure force dozens of cables into close proximity.<br>The Red Sea and the Bab-el-Mandeb Strait between Yemen and Djibouti carry an estimated 17 to 20 percent of global internet traffic between Europe, Africa, and Asia through a corridor a few dozen kilometers wide. In 2024, several major cables in this corridor were damaged — widely attributed to ship anchors in an area where Houthi attacks on shipping had already created instability. The economic disruption rippled through internet connectivity across the Middle East and East Africa for weeks.<br>The Singapore Strait performs a similar function for Asia-Pacific traffic — one of the densest concentrations of subsea cables on Earth, all passing through waters shared by some of the busiest commercial shipping lanes in the world.<br>The Taiwan Strait carries cables connecting East Asia’s major economies, in waters where commercial shipping, fishing fleets, and naval activity from multiple nations already overlap — and where cable damage incidents near Taiwan’s outlying islands have occurred multiple times in recent years, attributed variously to anchor drags and, in some cases, suspected deliberate activity.<br>The Baltic Sea has experienced a cluster of cable and pipeline damage incidents since 2023, prompting NATO members to increase naval patrols specifically to protect undersea infrastructure — an unprecedented peacetime allocation of military resources to protect fiber optic cables.<br>Here is the economic reality these incidents reveal: most cable damage is not sabotage. It is anchors, fishing equipment, and underwater landslides — mundane accidents that happen routinely. But because so many cables converge in so few corridors, even mundane accidents can have outsized consequences. And in regions where geopolitical tension is already elevated, the line between “accident” and “deniable gray-zone action” becomes economically and strategically blurry — which is itself a cost, regardless of what actually happened.<br>This geography cannot be re-engineered. The ocean floor’s depth contours, the location of continents, and decades of existing infrastructure mean new cables tend to follow similar routes to old ones. Chokepoints are not a temporary feature of the system. They are the system.
The Quiet Privatization Nobody Is Discussing<br>Here is the part of this story that receives almost no attention — and is, economically, the most significant.<br>For most of the history of undersea cables, ownership followed a consortium model. Multiple telecommunications companies — often dozens, sometimes representing different countries — would jointly fund a cable, share its capacity, and operate it as something closer to a shared utility than a private asset. This model reflected the economic reality that undersea cables were expensive, slow to build, and most valuable when shared broadly across many users.<br>That model is being replaced.<br>Google, Meta, Amazon, and Microsoft — the four largest cloud and AI infrastructure companies on Earth — have become the largest owners and lessors of undersea cable bandwidth in the world. Estimates suggest these four companies now own or control roughly half of all undersea cable bandwidth globally, a dramatic shift...