PsiQuantum is a developing quantum computer that uses photons as qubits.

PsiQuantum is on course to build the world’s first commercially viable quantum computer to solve some of the world’s most important challenges.

PsiQuantum was founded in 2016 by Jeremy O'Brien, Pete Shadbolt, Mark Thompson, and Terry Rudolph. The company is headquartered in Palo Alto, California.


PsiQuantum has developed a unique technology in which single photons (particles of light) are manipulated using photonic circuits which are patterned onto a silicon chip using standard semiconductor manufacturing processes.


PsiQuantum is manufacturing quantum photonic chips, as well as the cryogenic electronic chips to control the qubits, using the advanced semiconductor tools in the production line of PsiQuantum’s manufacturing partner GlobalFoundries.


PsiQuantum is currently working with global leaders in the healthcare, materials, electronics, financial, security, transportation, and energy sectors to identify and optimize algorithms and applications to support business readiness for the broad adoption of quantum computing.


PsiQuantum is backed by BlackRock, Atomico, Baillie Gifford, M12, Blackbird Ventures, Temasek, and others. The company raised $450M in Series D round on Jul 27, 2021. This brings PsiQuantum's total funding to $665M to date. The new round valued the company at $3.15B post-money.



  • Year founded: 2016
  • Funding Info: $665M over 4 Rounds (Latest Funding Type: Series D)
  • Yearly Revenue: NA
  • Employee Size: 51-200
  • Business Valuation: Valued at $3.15B as of July 27, 2021
  • City/Town: Palo Alto
  • State: California
  • Country: United States
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