Relativity Networks Secures $22M to Accelerate Data Center Connectivity

The startup’s technology transmits light through a vacuum chamber rather than traditional glass, cutting latency by 30%. CEO Jason Eisenholz notes that while standard fiber takes five microseconds to travel one kilometer, his hollow-core alternative reduces that to 3.5 microseconds. As AI clusters outgrow single buildings and sprawl across massive campuses, this microsecond advantage effectively allows developers to span 30% larger distances without hitting performance bottlenecks.

Relativity Networks secured the funding from Rhapsody Venture Partners, Bell Ventures Inc., and Faster Than Glass LLC. Beyond the investment, the company confirmed a $40 million follow-on order from an unnamed hyperscaler. For Eisenholz, the industry is entering a shift where compute and internal networking are no longer the only priorities; the third era of AI development is fundamentally about optimizing geography.