Lumai was founded by James Spall, Xianxin Guo in 2022.

Who are Lumai's investors?

Lumai's investors include Blank Space Ventures, Constructor Capital US, LIFTT, PhotonVentures, Qubits Ventures, Runa Capital, Journey Ventures.

How much funding has Lumai raised?

Lumai has disclosed $10M raised across 1 of its 2 known rounds.

Lumai

Founded 2022 · 26 employees on LinkedIn · 11 known investors

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Lumai develops optical compute hardware and inference servers for datacenter applications. Iris Nova is their platform designed for fast token processing at low power consumption for large language model inference.

AI & Machine Learning Deep Tech Hardware Semiconductors

Founders & leadership

Lumai was founded in 2022 by James Spall and Xianxin Guo.

James SpallCTO & Co-founderJames Spall is co-founder of Lumai, an Oxford University spinout developing optical compute hardware for AI acceleration and datacenter inference applications.

Xianxin GuoCo-founder · Chief Executive OfficerHe holds a PhD in quantum optics and quantum memory, conducted postdoctoral research in optical computing at the University of Oxford where he developed optical neural network architectures and an all-optical backpropagation algorithm, and received the 1851 Research Fellowship.

Investors · 11

Blank Space Ventureslisted by Blank Space VenturesSan Francisco

How we know: Blank Space Ventures's portfolio page · Not right? Tell us

Constructor Capital USlisted by Constructor Capital USGrand Cayman

LIFTTlisted by LIFTTTorino

How we know: LIFTT's portfolio page · datacenter.news · funding news · Not right? Tell us

PhotonVentureslisted by PhotonVenturesHilversum · $1.1M – $2.7M

How we know: datacenter.news · funding news · Not right? Tell us

Qubits Ventureslisted by Qubits VenturesPasadena

How we know: Qubits Ventures's portfolio page · datacenter.news · funding news · Not right? Tell us

Runa Capitallisted by Runa CapitalLuxembourg · $500K – $5M

How we know: Runa Capital's portfolio page · Not right? Tell us

Journey Venturesreported

How we know: datacenter.news · funding news · Not right? Tell us

Also in the syndicate · 4

Constructor CapitalleadIP GroupState Farm VenturesTIS Inc.

Funding

SEC filings, press & company announcements

$10M disclosed across 1 of 2 rounds · 2025–2026

$10MraisedApr 2025 · 4 sources
Constructor Capital (lead), IP Group, Journey Ventures, LIFTT, PhotonVentures, Qubits Ventures, State Farm Ventures, TIS Inc.
Source ↗

Source: company announcements and press reports — follow each round's link for the claim.

Frequently asked questions

What does Lumai do?: Lumai develops optical compute hardware and inference servers for datacenter applications. Iris Nova is their platform designed for fast token processing at low power consumption for large language model inference.
Who founded Lumai?: Lumai was founded by James Spall, Xianxin Guo in 2022.
Who are Lumai's investors?: Lumai's investors include Blank Space Ventures, Constructor Capital US, LIFTT, PhotonVentures, Qubits Ventures, Runa Capital, Journey Ventures.
How much funding has Lumai raised?: Lumai has disclosed $10M raised across 1 of its 2 known rounds.