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 publishes the most detailed public roadmap in the industry, aiming for a fault-tolerant system called Starling by 2029.
Google (Google Quantum AI)
Superconducting qubits (neutral atom program added in 2026)
Google Quantum AI builds superconducting quantum processors, including the 105-qubit Willow chip, which showed that error rates can fall as more qubits are added. In March 2026 the lab added a second track based on neutral atoms.
Microsoft
Topological qubits (Majorana-based, experimental) plus cloud and software for partner hardware
Microsoft is pursuing topological qubits based on Majorana zero modes, a high-risk approach designed for built-in error protection, while its Azure Quantum cloud gives developers access to hardware from partners. Its Majorana 1 and Majorana 2 chips remain scientifically debated.
IonQ
Trapped-ion qubits (ytterbium)
IonQ builds trapped-ion quantum computers and has grown quickly through acquisitions into networking, sensing, space, and semiconductor manufacturing. Revenue is rising fast, but so are losses.
Rigetti Computing
Superconducting qubits (chiplet-based modular architecture)
Rigetti designs and manufactures superconducting quantum processors and pioneered a chiplet approach, joining small 9-qubit chips into larger systems such as the 108-qubit Cepheus-1-108Q.
Quantinuum
Trapped-ion qubits (QCCD architecture, barium and ytterbium ions)
Quantinuum builds trapped-ion quantum computers that hold some of the highest published gate fidelities in the industry. It listed on Nasdaq in June 2026 after one of the largest quantum IPOs to date, and its latest system, Helios, is the centerpiece of a roadmap to fault-tolerant machines by 2029.
D-Wave Quantum
Quantum annealing (superconducting flux qubits); gate-model dual-rail superconducting qubits in development
D-Wave sold the first commercial quantum computer and remains the leading maker of quantum annealers for optimization. In January 2026 it bought Quantum Circuits to add gate-model hardware, and it now describes itself as the only dual-platform quantum company.
Xanadu Quantum Technologies
Photonic qubits (squeezed light, continuous-variable and GKP encodings)
Xanadu builds photonic quantum computers that use particles of light as qubits. It became the first publicly traded pure-play photonic quantum company in March 2026 and says it is on track for fault-tolerant operation around 2028 to 2029.
Pasqal
Neutral atom qubits held in optical tweezers
Pasqal builds neutral atom quantum computers in which individual atoms are held in place by focused laser beams. It has deployed seven systems, including a 200-qubit machine for Aramco, and moved to a Nasdaq listing in 2026.
Origin Quantum
Superconducting qubits (with a parallel silicon semiconductor qubit program)
Origin Quantum is China's leading commercial quantum computer maker, building chips, control systems, dilution refrigerators, an operating system, and a cloud platform in-house. Its Wukong series reached 180 qubits in 2026, and the company is preparing a listing on Shanghai's STAR Market.
Alice & Bob
Superconducting cat qubits (bosonic qubits)
Alice & Bob builds quantum computers from cat qubits, a kind of superconducting qubit designed to suppress one of the two main error types by construction. The company plans a 100-logical-qubit machine, code-named Graphene, by 2030.
QuEra Computing
Neutral atom qubits (rubidium atoms in optical tweezers)
QuEra is a Harvard and MIT spin-out that builds neutral atom quantum computers. It has delivered systems to Japan's AIST and the UK's National Quantum Computing Centre and plans a megaquop-class system by 2028.
Classiq
Quantum software (hardware-agnostic circuit synthesis and compilation)
Classiq makes the leading enterprise platform for designing quantum algorithms at a high level and automatically compiling them for any hardware. It has raised more than 200 million dollars, the largest total for a quantum software company.
Multiverse Computing
Quantum-inspired software; tensor networks for AI model compression (CompactifAI)
Multiverse Computing started as a quantum software company for finance and is now best known for CompactifAI, which uses tensor networks from quantum physics to shrink large language models by up to 95%. A 570 million dollar round in July 2026 valued it at 1.7 billion dollars before the investment.
IQM
Superconducting qubits (Crystal square-lattice and Star architectures)
IQM builds superconducting quantum computers that customers buy and run on their own premises, and it is the first European quantum hardware company listed on Nasdaq. It has deployed more than a dozen systems and is developing a new line, Halocene, for error correction.
Q-CTRL
Quantum infrastructure software (error suppression, control, and calibration) and quantum sensing for navigation
Q-CTRL sells software that makes quantum computers more accurate, and quantum navigation systems that work without GPS. Its Fire Opal software is built into IBM's cloud, and its Ironstone Opal navigation system was the first of its kind qualified for flight safety.
Phasecraft
Quantum algorithms (hardware-agnostic) for simulation and optimization
Phasecraft designs quantum algorithms that run on today's noisy machines, with a focus on simulating materials and optimizing energy systems. It works with Google, IBM, Quantinuum, QuEra, and Atom Computing and raised a 34 million dollar Series B in 2025.
Quantum Computing Inc. (QCi)
Integrated photonics (thin-film lithium niobate); room-temperature photonic optimization machines
QCi is a Nasdaq-listed company that builds photonic quantum hardware that works at room temperature, and it now runs its own thin-film lithium niobate chip foundry. Revenue is growing from a very small base, and it held about 1.3 billion dollars in cash and investments in mid-2026.
Strangeworks
Quantum and high-performance computing software platform (hardware-agnostic)
Strangeworks runs a platform that gives users one place to access quantum computers, simulators, and optimization solvers from many providers. In 2025 it acquired the German optimization company Quantagonia and expanded into India.
Zapata AI (now Zapata Quantum)
Quantum software and algorithms (hardware-agnostic), including the Orquestra workflow platform
Zapata was an early Harvard spin-out in quantum software that went public in 2024, pivoted to generative AI, and then ceased operations in October 2024. It has since re-emerged as Zapata Quantum, a restructured company rebuilding around quantum algorithms and applications.