PsiQuantum is building a large-scale quantum computer that uses particles of light instead of the electrical circuits used in traditional computers. Their key advantage is that they manufacture their quantum components in standard chip factories, making their approach uniquely scalable compared to other quantum products.  Unlike competitors using superconducting or trapped-ion qubits that require exotic manufacturing, PsiQuantum fabricates its quantum components in standard silicon foundries, making its approach uniquely scalable to the millions of qubits needed for useful computation. Their photonic architecture operates at room temperature components where possible, avoiding the extreme cooling requirements of superconducting approaches.

Quantum computing promises to solve optimization and simulation problems that are intractable for classical AI, and PsiQuantum's photonic approach could enable quantum-enhanced machine learning algorithms that dramatically accelerate AI capabilities.

PsiQuantum raised $1.5B in a Series E at a $10.5B valuation, with investors including Nvidia, Blackrock, and Baillie Gifford.