Salience Labs Closes $125M to Accelerate Optical Switching

The big picture: Salience Labs, a developer of photonic chips for AI data center connectivity, has closed an oversubscribed $125 million Series B funding round. The investment will accelerate the deployment of its optical switching technology and expand manufacturing operations.

Why it matters:

• AI infrastructure demands: As AI computing infrastructure expands, data centers face increasing pressure on network performance, efficiency, and power consumption, which optical switching is designed to address.
• GPU connectivity: Salience Labs’ technology improves connectivity between thousands of GPUs across multiple racks, a critical requirement for large-scale AI workloads.
• Market validation: The oversubscribed round and participation from strategic investors like AMD Ventures and Intel Capital underscore the market’s belief in the company’s optical circuit switching (OCS) technology.

How it works:

• Optical Circuit Switching (OCS): Salience Labs develops a fully integrated, all-optical switching architecture using photonic chips to manage high-speed data flow within AI data centers.
• Integrated chip architecture: Built on over a decade of silicon photonics research, the company’s chip design is optimized for high-volume manufacturing and deployment across AI data center infrastructure.
• Scalable solutions: The company has demonstrated a 64-port all-optical photonic switch and is developing 128-port and 256-port versions to support larger networks and data-intensive environments.

The catch: The rapidly evolving AI hardware landscape presents a challenge, with continuous innovation in GPU interconnects and alternative networking solutions. Salience Labs must ensure its optical switching technology remains competitive against proprietary solutions and other emerging standards while scaling manufacturing to meet potential demand.

Key Facts

• Company: Salience Labs
• Amount: $125M
• Round: Series B
• Investors: Bullhound Capital (lead), AMD Ventures, Intel Capital, SBI Group, Hudson River Trading, British Business Bank, Applied Ventures, Oxford Science Enterprises, Cambridge Innovation Capital, Silicon Catalyst Ventures
• Founder: Vaysh Kewada
• Announced: 2026-10-14
• Sector: Photonic Chips for AI Data Centers
• Headquarters: Oxford, UK