PsiQuantum

PsiQuantum, based in Palo Alto, California, is trying to build a large error-corrected quantum computer that uses single particles of light (photons) as qubits. Its chips are made in a commercial semiconductor factory rather than a research lab, a bet that standard chipmaking can supply the very large number of parts it says a useful machine needs. It has not released a working computer for customers; instead it is building two large sites, in Queensland, Australia and Chicago, meant to host its first full-scale systems.

private company · Based in United States · Since 2016 · Facts checked 27 October 2026

Where it ranks this month

Best place in each race, from QubitBenchmark release 2026-11.1.

All rankings →

Most accurate–No ranked result Error-corrected qubits–No ranked result Most qubits–No ranked result Fastest–No ranked result Use it today–No ranked result

Machines

Machine	Physical qubits	Introduced	How to use it
Omega chipset (silicon photonic chipset, not a complete computer)	–	2025	not publicly available

Qubit counts as the company reports them. Our rankings use QubitBenchmark's checked results instead.

Promised vs delivered

What PsiQuantum has said it would build, and what happened.

All roadmaps →

Milestone	Target	Status	Why we say so
Commercially useful quantum computer (earlier target reported by press)	2025	Slipped	A May 2024 analysis by UTS physicist Chris Ferrie says PsiQuantum had earlier planned for a 2025 deadline; no PsiQuantum machine was delivered in 2025. Source
Brisbane utility-scale site operational	end of 2027	Slipped	Australian officials told Senate Estimates the project could be up to 12 months behind; the site moved from Brisbane Airport to Moreton Bay with groundbreaking only in June 2026, and the cryoplant is due in the second half of 2027 before site commissioning. PsiQuantum itself has not published a new date. Source
Break ground on Chicago Quantum Compute Center	2025	Delivered	Construction began at the Illinois Quantum and Microelectronics Park on 30 September 2025, and phase-one construction was reported in November 2025. Source
Break ground on Brisbane Quantum Compute Center	2025	Slipped	Groundbreaking happened on 18 June 2026 at a new site, Moreton Bay Central, rather than in 2025. Source
Chicago IQMP phase one (about 30 acres, incl. cryogenic plant) complete	2027	Unclear	Reported completion target of 2027 for the park's first phase; no PsiQuantum date for a working machine there. Source
Brisbane cryoplant (Linde) delivered	second half of 2027	Unclear	Stated in the June 2026 groundbreaking release; no later update found. Source
Utility-scale, fault-tolerant (million-qubit) quantum computer	No date given	In progress	Current company materials (2026) describe the goal and the two sites but give no completion date. Source

Recent claims, and how far the evidence has got

Peer-reviewed Omega chipset: 99.98% single-qubit state preparation and measurement fidelity, 99.5% two-photon interference visibility, 99.72% chip-to-chip interconnect fidelity, made at GlobalFoundries Source
Announced Expanded $125 million performance-based DARPA agreement under Stage C of the Quantum Benchmarking Initiative Source

In other organisations' rankings

Where PsiQuantum appears in other published rankings and lists. They don't change ours.

All of them →

Four more teams enter Quantum Benchmarking Initiative final stage (QBI Stage C), DARPA (US Defense Advanced Research Projects Agency) (2026-10-07). An authoritative government selection, but it assesses plans and their feasibility, not measured performance, and the October 2026 announcement says nothing about the other seven Stage B companies.
The Quantum Index Report 2026: Quantum Processor Benchmarking (chapter 10), MIT Initiative on the Digital Economy (with Accenture) (2026-10). Broad and well-sourced overview, but it compiles vendor-reported numbers rather than measuring them, and it says no independently verified universal metric exists.
The Quantum Index Report 2026, MIT Initiative on the Digital Economy (MIT Sloan), in collaboration with Accenture (2026-10). Transparent, sourced and openly licensed data, but it measures activity (patents, funding, press releases) rather than how well the machines perform.
CB Insights ESP matrices: Quantum computer makers (neutral atoms, photonics, silicon qubit, superconducting circuits, trapped ions), CB Insights (2026). Based on market and business signals, not machine performance. Vendors can brief CB Insights, and most placements are hidden behind a subscription.
Quantum Benchmarking Initiative: Stage B Selection, DARPA (US Defense Advanced Research Projects Agency) (2025-11-06). An official list of who advanced, not a ranking; it partly rests on plans and roadmaps, and Stage C has since narrowed it (see darpa-qbi-stage-c-2026).

Sources

PsiQuantum Announces Omega, a Manufacturable Chipset for Photonic Quantum Computing, PsiQuantum, 26 February 2025
A manufacturable platform for photonic quantum computing (arXiv:2404.17570), arXiv, 26 April 2024
PsiQuantum home page, PsiQuantum
PsiQuantum Breaks Ground in Australia on Site of World's First Utility-Scale Quantum Computer, PsiQuantum, 18 June 2026
PsiQuantum Appoints Victor Peng as Interim CEO, Co-Founder Jeremy O'Brien to Become Executive Chairman, PsiQuantum, 10 February 2026
PsiQuantum signs $125 million agreement with DARPA, PsiQuantum, 22 July 2026
Four more teams enter Quantum Benchmarking Initiative final stage, DARPA, 7 October 2026
PsiQuantum DARPA QBI Stage C, Post-Quantum, 23 July 2026
PsiQuantum's Brisbane build is already running very late, Startup Daily, 9 December 2025
Brisbane Airport out, Moreton Bay in: PsiQuantum picks new site for its $940m quantum computer build, Startup Daily, 21 May 2026
Phase One Construction Begins on Chicago Quantum Computing Facility, The Quantum Insider, 9 November 2025
Delivering a Future Made in Australia with 400 new technology jobs in Brisbane, Prime Minister of Australia, 30 April 2024
The Conversation: Australia just made a billion-dollar bet on building the world's first useful quantum computer in Brisbane. Will it pay off?, The Quantum Insider (republished from The Conversation; author Christopher Ferrie), 1 May 2024