Investment in subsea cable projects is expected to reach around $13 billion between 2025 and 2027, almost twice the amount invested between 2022 and 2024, according to telecommunications data provider TeleGeography. Tech giants Meta, Google, Amazon and Microsoft now represent about 50% of the overall market, up from a negligible share a decade ago.
The companies are expanding their subsea infrastructure to connect growing networks of data centers needed for AI development. Meta announced Project Waterworth in February, a 50,000-kilometer cable connecting five continents that will be the world's longest subsea cable project. Amazon announced its first wholly-owned subsea cable called Fastnet, connecting Maryland to Ireland. Google has invested in over 30 subsea cables. Over 95% of international data and voice call traffic travels through nearly a million miles of underwater cables.
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