Lightmatter
Agent45Agent Readiness: 45/100. Above median. Measured by StartupHub.ai. Median 41.Trust79Data Trust: 79/100. Top 25%. Measured by StartupHub.ai. Median 61.Developing photonic computing and interconnect technology to accelerate AI infrastructure and improve energy efficiency.
About
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.
Listed competitors
Industry-leading AI infrastructure for ultra-fast AI inference and training powered by Wafer-Scale Engines.
Developing photonic computing and interconnect technology to accelerate AI infrastructure and improve energy efficiency.
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Groq develops a high-performance AI inference chip and compiler for ultra-low latency AI applications.
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Key facts
- Website
- lightmatter.com
- Headquarters
- Mountain View, United States
- Founded
- 2017
- Employees
- 318
- Total funding
- $400M (Series D)
- Business model
- B2B
Funding rounds
| Date | Round | Amount | Post-money | Lead investors |
|---|---|---|---|---|
| 16 Oct 2024 | Series D | $400M | $4.4B | T. Rowe Price |
Tech stack
Detected on lightmatter.com, last scanned 26 Oct 2026. Run your own scan
- Frontend
- Alpine.js, Tailwind CSS
- Analytics
- Google Analytics 4
- CMS / Builders
- WordPress
- CDN
- Cloudflare
- Email provider
- Google Workspace
Lightmatter scores 54. Does yours?
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4 reviews from Reddit gathered in one place
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!
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.
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…
What is your opinion on Lightmatter as a company?
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Frequently asked
Is Lightmatter trustworthy and reputable?
StartupHub's Data Trust & Reputation score for Lightmatter is 79 out of 100, a generally safe rating, based on site security posture, privacy practices, malware and phishing checks, and public reputation signals.
How much funding has Lightmatter raised?
Lightmatter has raised a total of $400M in funding. The most recent round on record is Series D.
How many employees does Lightmatter have?
Lightmatter has approximately 318 people on record.
Public record
SEC filings, insider activity, nonprofit links and pay benchmarks for Lightmatter
