Celestial AI

Photonic Fabric optical interconnect technology for AI data centers

Semiconductors 📍 Santa Clara, CA Founded 2020

Current Valuation

$2.5B

as of 2025-Q1

UNICORN

Celestial AI develops the Photonic Fabric optical interconnect platform for AI data centers, replacing copper with light to dramatically increase bandwidth between accelerators while reducing power consumption. The company competes directly with Ayar Labs and Lightmatter in the photonics-for-AI category. In March 2025, Celestial AI raised a $250M Series C1 led by Fidelity at a ~$2.5B valuation, bringing total funding to ~$580M. Strategic investors include AMD Ventures and BlackRock.

Company Profile

CEO

Dave Lazovsky

Founded

2020

Santa Clara, CA

Employees

~200

Total Raised

$580M

Growth

Series C1 growth; early customer engagements with hyperscalers

Last Round

Series C1 — $250M (Mar 2025) · Lead: Fidelity Management & Research

IPO Status

private

Founders & Key People

Dave LazovskyPhil Winterbottom

Investors

Fidelity · U.S. Innovative Technology Fund · BlackRock · AMD Ventures · Temasek · Tiger Global

Products

Photonic Fabric optical interconnect platform
Optical I/O chiplets for accelerator-to-accelerator communication
OCS (Optical Circuit Switch) reference designs for AI training

Competitors

Ayar Labs · Lightmatter · Coherent · Marvell (PAM4)

PhotonicsOptical InterconnectAI InfrastructureSemiconductorsHyperscaler