Database · 500+ Companies (Goal)
Quantum Companies
Profiles of the companies building quantum computers — including founding history, leadership, funding, technology, products, and the latest news for each.
IBM
Superconducting qubits
IBM operates one of the world's largest fleets of cloud-accessible quantum computers and has published a long-term roadmap toward fault-tolerant, error-corrected quantum systems through its IBM Quantum division.
Google (Google Quantum AI)
Superconducting qubits
Google Quantum AI is known for its Sycamore processor and early demonstrations of 'quantum supremacy,' and continues to develop superconducting processors aimed at error correction breakthroughs.
Microsoft
Topological qubits (experimental)
Microsoft pursues a topological approach to qubits aimed at inherently lower error rates, alongside its Azure Quantum cloud platform offering access to hardware from multiple partners.
IonQ
Trapped-ion qubits
IonQ builds trapped-ion quantum computers, offering cloud access through major platforms and pursuing applications in chemistry, optimization, and machine learning.
Rigetti Computing
Superconducting qubits
Rigetti Computing designs and fabricates superconducting quantum processors and offers full-stack cloud access for developers and researchers.
Quantinuum
Trapped-ion qubits (QCCD architecture)
Quantinuum, formed from the 2021 merger of Honeywell Quantum Solutions and Cambridge Quantum, builds trapped-ion quantum computers using a quantum charge-coupled device (QCCD) architecture and has repeatedly set records for two-qubit gate fidelity. The company completed its initial public offering on the Nasdaq in June 2026.
D-Wave Quantum
Quantum annealing (superconducting flux qubits); also developing gate-model systems
D-Wave was the world's first commercial supplier of quantum computers, specializing in quantum annealing hardware designed specifically for optimization problems. The company is now also expanding into gate-model quantum computing, including through its 2026 acquisition of Quantum Circuits.
Xanadu Quantum Technologies
Photonic qubits (continuous-variable, squeezed light states)
Xanadu builds photonic quantum computers that use light rather than matter-based qubits, an approach that can operate near room temperature and may benefit from existing semiconductor photonic manufacturing techniques. The company became the first publicly traded pure-play photonic quantum computing company via a 2026 SPAC merger.
Pasqal
Neutral atom qubits (optical tweezers)
Pasqal builds neutral atom quantum processors that hold individual atoms in place using precisely focused laser beams, allowing programmable, reconfigurable qubit connectivity. The company has announced plans to go public on Nasdaq via a SPAC merger.
Origin Quantum
Superconducting qubits
Origin Quantum is China's first and most prominent quantum computing company, building its entire technology stack in-house — from quantum chips and dilution refrigerators to its own operating system and cloud platform. Its Origin Wukong processor is among the most advanced quantum computers developed in China.