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Lightmatter

Optical chip links, Passage

US$4.4B privateest. 2017lightmatter.co (opens lightmatter.co)Checked 25 Sep

The brief

Analyst view
  • Raised $400M Series D at a $4.4B valuation led by T. Rowe Price (Oct 2024).
  • Passage M1000 (2025) is an optical base for chips with 114 Tbps of total bandwidth.
  • Published a light-based processor running AI models in Nature (April 2025).
Programs

Lightmatter, one program

Updated 2 Jun 2026
PassageOptical links for AI chips: M1000 is a large optical base that GPUs and switches sit on. L200 is a co-packaged optics chiplet with 32-64 Tbps of bandwidth.PilotNextVolume customer deploymentsUpdated 2 Jun 2026View program →
Research · Proto · Pilot · Deploy · Scaling

Peers

Photonics & interconnect · 1

Company & funding

1 round · as reported
Valuation
$4.4Bprivate
Raised
$400Mdisclosed private rounds
Last round
Series DOct 2024
HQ
US
Founded
2017
DateRoundAmountPost-moneyLead
Oct 2024Series D$400M$4.4BT. Rowe Price

People

Key people
  • Nick HarrisCo-founder and CEO
Primer