Celestial AI

Celestial AI is a Santa Clara-based company that has developed the Photonic Fabric, an optical interconnect technology platform for compute and memory in AI infrastructure. The company's proprietary technology uses light for data movement both within and between chips, aiming to address the challenges of increasing memory capacity and bandwidth requirements in advanced AI models.

Celestial AI's Photonic Fabric technology claims to deliver over 25x greater bandwidth and memory capacity while reducing latency and power consumption by up to 10x compared to existing copper and optical interconnect alternatives. The company's Memory Fabric offers tens of terabytes of optically scalable memory capacity, supporting current HBM3e and future HBM4 bandwidth and latency requirements. Their Compute Fabric enables clusters of hundreds of GPUs or AI accelerators to be optically interconnected with high bandwidth, low latency, and low energy consumption.

The company's technology is designed to be compatible with existing industry standards including CXL, PCIe, UCIe, JEDEC HBM, and proprietary electrical communication links. Celestial AI offers its Photonic Fabric optical interconnect technology and silicon-proven IP through a technology licensing program. Additionally, the company has developed the Orion AI accelerator, which harnesses the full end-to-end benefits of the Photonic Fabric.

Key customers and partnerships

Celestial AI has established partnerships with major semiconductor companies. In March 2024, Samsung Electronics and Advanced Micro Devices (AMD) participated in Celestial AI's Series C funding round, indicating potential strategic collaborations. The company has also mentioned working with high-volume commercial supply chain partners to build a robust Photonic Fabric ecosystem.