Lightmatter
Developing photonic computing and interconnect technology to accelerate AI infrastructure and improve energy efficiency.
About
Technology stack
detected 2026-06-09“Lightmatter unveils Guide DR, the AI Industries first liquid-cooled laser NIC that quadruples rack density. This isn’t just a product update—it’s a fundamental rethink of how light powers the data center. The future of AI infrastructure is…”
View on Reddit“I have an interview coming up with Lightmatter for their Analog design team. Has anyone interviewed with them before? If you have, any insight into what they like to ask would be helpful!”
View on Reddit“Hey, I recently received an offer from Lightmatter for a Data Analytics and AI Intern role. I was wondering about the company’s reputation within the industry. I understand that it’s a startup, but I’d still love to get some perspective.”
View on Reddit“Lightmatter announces M1000: multi-reticle eight-tile active 3D interposer enabling die complexes of 4,000 mm^2, and Passage L200. Their big claim is that interconnect is a significant bottleneck for GPU clusters, and that they solve that t…”
View on Reddit“What is your opinion on Lightmatter as a company?”
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What does Lightmatter do?
Lightmatter creates photonic supercomputing hardware, including 3D-stacked photonic chips and interconnects, that use light instead of electricity to move data and perform calculations. Their technology addresses critical bottlenecks in AI data centers, such as bandwidth, latency, and power consumption, enabling more scalable and efficient AI model training and inference.
How much funding has Lightmatter raised?
Lightmatter has raised a total of $490M in funding. The most recent round on record is Series D.
Where is Lightmatter headquartered?
Lightmatter is headquartered in Mountain View, United States.
When was Lightmatter founded?
Lightmatter was founded in 2017.
What industry does Lightmatter operate in?
Lightmatter operates in Hardware, Semiconductors, Photonics, AI Infrastructure, Data Center, AI Hardware & Chips.
How many employees does Lightmatter have?
Lightmatter has approximately 318 people on record.