Relativity Networks

Data Center Infrastructure · Fiber Optics · AI Infrastructure

Funding

Relativity Networks raises $22M, secures $40M hyperscaler fiber order

Hollow-core fiber shaves microseconds off transmission, letting hyperscalers spread GPU clusters across distant sites without breaking latency limits.

• Relativity Networks closed a $22 million SAFE note — more than double its target — from new investors Rhapsody Venture Partners, Bell Ventures Inc. and Faster Than Glass LLC, and landed a $40 million follow-on order from an unnamed hyperscaler.
• The Orlando startup makes ChronoCore hollow-core fiber, guiding light through an air-filled core instead of glass to push transmission closer to light's theoretical speed limit.
• CEO Jason Eichenholz says a signal takes about 5 microseconds to cross a kilometer of conventional fiber versus 3.5 microseconds on hollow-core, a gap that compounds as AI data centers sprawl across multiple campuses.
• The $40M hyperscaler order followed successful tests linking two data centers with ChronoCore, after Relativity and cable maker Prysmian produced their densest hollow-core cable yet: 24 fibers in one 10-millimeter line.
• Data center developers are projected to spend up to $4 trillion by 2030, increasingly constrained by power access rather than compute capacity, making physical distance between sites a new scaling bottleneck.
• As hyperscalers stitch together multiple campuses to feed AI workloads, shaving microseconds off inter-site latency could let them chase cheaper power and land farther from population centers without sacrificing performance.