Laser startup with $10.75M seed aims to replace undersea internet cables

The world’s data doesn’t truly float in the cloud. It travels through roughly 1.4 million kilometers of fragile fiberoptic cables draped across ocean floors — a system that’s notoriously difficult to repair and surprisingly easy to sever. A startup called Endeavor Optical Networks, emerging from stealth today, thinks it’s time to point that traffic toward the sky instead.

EON’s pitch hinges on lasers. Not the radio-frequency links used by current satellite internet providers, which top out far below the 200 terabits per second pushed through undersea fiber, but optical beams that could theoretically match that throughput from orbit. The company just raised a $10.75 million seed round led by General Catalyst and Andreessen Horowitz to prove it can hit 2.4 terabits per second — nearly a thousand times faster than recent space-to-ground laser demos by NASA and others. The catch, as anyone who’s watched starlight twinkle knows, is atmospheric distortion. Clouds scatter light. Turbulence bends it. EON won’t say exactly how they’ll solve this beyond calling it “secret sauce,” but the plan requires building roughly 20 satellites and carefully selecting ground stations with redundant sites and real-time weather data to keep links stable.

CEO Charlie Horowitz and CTO Tyler Presser are targeting the biggest bandwidth hogs on the planet: hyperscalers and AI labs. They’re not trying to blanket the globe with consumer internet. Instead, they’ll sell dedicated, controlled links on underserved routes where laying cable is impractical or politically fraught — think France to Australia, or bridging Africa and South America. The initial 24/7 coverage will require the full satellite fleet, but a single demo spacecraft slated for late 2027 aims to deliver at least 800 gigabits per second, which would already be the highest optical downlink throughput ever demonstrated.

This is an audacious timeline for hardware that must function in a vacuum. The company plans to buy off-the-shelf satellite buses from Apex Space — Horowitz’s previous employer — and focus its engineering muscle on the optical terminals, particularly the gimbals that must point a laser with surgical precision across thousands of kilometers. Jeannette zu Fürstenberg, who led the investment for General Catalyst, frames it as a bet on “founder-product fit” rather than a proven technology. That’s honest. Blue Origin’s TeraWave project envisions over 5,000 satellites doing something similar, and they’re at least years away from deployment. EON’s smaller constellation should be quicker to launch, but the physics of beaming through a turbulent atmosphere with cloud cover doesn’t get easier just because you’re moving fast. The question isn’t whether data centers want alternatives to seafloor cables — they absolutely do — but whether the atmosphere will cooperate.