L

Lightmatter

Hardware

Photonic interconnect and compute chips for AI data centers, including the Passage interconnect platform sold to OEMs and hyperscalers integrating it into AI-cluster hardware.

Total funding$850M

Valuation$4.4B

Employees—

Founded2017

HeadquartersMountain View, USA

StatusPrivate

Product

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• Passage Hardware

  3D photonic interconnect platform using an edgeless I/O architecture to scale bandwidth across AI clusters (56-448 Gbps per lane, 1-16+ wavelengths); shipped as reference evaluation kits (M1000, EVK100, EVK50) to early-access partners.

Similar products 13

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

ALAyar LabsPrivate · $3.8BPassage and TeraPHY do comparable work on interconnect and optical I/O; both also serve buyers who need to connect AI clusters; same layer and the same scale band (growth-stage private).2 of 2 capabilitiesShared product typeSame scale bandCompareRRanovusPrivatePassage and Odin do comparable work on interconnect and optical I/O; both also serve buyers who need to connect AI clusters; Ranovus's scale not recorded.2 of 2 capabilitiesShared product typeCompareCTCredo Technology GroupPublicPassage and ZeroFlap / OmniConnect do comparable work on interconnect; both also serve buyers who need to connect AI clusters; Credo Technology Group's scale not recorded.1 of 2 capabilitiesShared product typeCompareMTMarvell TechnologyPublic · $214.9BPassage and Marvell Linear Drivers do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareALAstera LabsPublic · $50.4BPassage and Aries Smart Cable Modules do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareANArista NetworksPublic · $246.4BPassage and 7060X5 Series do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareBBroadcomPublic · $1.7TPassage and Broadcom AI networking silicon do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareCCiscoPublic · $433.3BPassage and Cisco Silicon One do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareNNVIDIAPublic · $5.1TPassage and NVIDIA Quantum-X InfiniBand do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareSESamsung ElectronicsPublic · $1.2TPassage and Samsung CMM-D do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareHHuaweiPrivatePassage and Atlas 950 SuperPoD do comparable work on interconnect; both also serve buyers who need to connect AI clusters; larger scale (private).1 of 2 capabilitiesShared product typeCompareAAMDPublic · $785.1BPassage and AMD Pensando AI NICs do comparable work on interconnect; larger scale (public).1 of 2 capabilitiesShared product typeLarger scaleCompareRRunPodPrivatePassage and Runpod Clusters do comparable work on interconnect; both also serve buyers who need to connect AI clusters; RunPod's scale not recorded; ships developer tool, infrastructure service and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Total funding

Company disclosure · 22 Sep 2026

Lightmatter's own About page, read 2026-09-22, states "$850M raised. $4.4B valuation." as a live cumulative figure.

Valuation

Press release · 16 Oct 2024

Lightmatter's own press release, published 2024-10-16: $400M Series D quadruples the company's valuation to $4.4B, led by investors advised by T. Rowe Price Associates. Same figure restated on the company's own live About page.

Founded

Company disclosure · 22 Sep 2026

Lightmatter's own About page, read 2026-09-22: "Founded by MIT researchers in 2017."

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