Evaluating only PsiQuantum’s profile at its peak — without knowing the outcome — the model ranked Unit economics as the #1 likely cause. Documented cause: Product failure.
Key Events Timeline
FOUNDING
Jeremy O'Brien and Pete Shadbolt founded PsiQuantum in Palo Alto to build million-qubit photonic quantum computers.
FUNDING
Raised $450M Series D at $3.15B valuation, partnering with GlobalFoundries for silicon photonics chip fabrication.
FUNDING
Australian government committed AUD$940M alongside private investors for a Brisbane-based quantum facility.
LAYOFF
Cut 20% of workforce after missing photon source fidelity milestones; investors froze additional tranches pending results.
Full Analysis
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Documented cause
PsiQuantum raised $665M from investors including Microsoft, BlackRock, and the Australian government to build a fault-tolerant photonic quantum computer using silicon photonics manufactured by GlobalFoundries. In 2024 the company underwent significant restructuring, laying off roughly 20% of its 300-person workforce, after missing key photon source error-rate targets and facing a $2M+ monthly burn rate that investors would no longer sustain.
Lesson
“Betting on fault-tolerant quantum before error rates are solved burns capital faster than any roadmap predicts.”