Quantum Computing Companies

Alice & Bob is a Paris-based quantum computing startup (founded in Feb 2020 by Dr. Théau Peronnin and Dr. Raphaël Lescanne) focused on building a universal, fault-tolerant quantum computer using a novel “cat qubit” architecture. The company’s approach leverages superconducting cat qubits, quantum bits that are inherently protected from certain…

Alice & Bob is a Paris-based quantum computing startup (founded in Feb 2020 by Dr. Théau Peronnin and Dr. Raphaël Lescanne) focused on building a universal, fault-tolerant quantum computer using a novel “cat qubit” architecture. The company’s approach leverages superconducting cat qubits, quantum bits that are inherently protected from certain…

Amazon has taken a dual approach to quantum computing, combining cutting-edge hardware research with commercial cloud services. On the R&D side, Amazon Web Services (AWS) established the AWS Center for Quantum Computing at Caltech in 2019, explicitly aiming to build a fault-tolerant quantum computer capable of solving problems beyond classical…

Atom Computing is a fast-rising startup developing gate-based quantum computers using optically trapped neutral atoms as qubits. The company made headlines in late 2023 by announcing a 1,225-site optical atom array populated with 1,180 qubits - the first universal quantum platform to surpass 1,000 qubits. This dramatic leap (from a…

D-Wave Systems is a pioneer in quantum computing known for its unique focus on quantum annealing - a specialized analog approach distinct from the gate-based quantum processors pursued by most competitors. Founded in 1999, D-Wave became the first company to commercially sell a quantum computer in 2011 with a 128-qubit…

Diraq is an Australian quantum computing startup (founded in 2022 as a spin-off from UNSW Sydney by Professor Andrew Dzurak) focused on building large-scale quantum processors based on silicon-based spin qubits. The company’s strategy is to leverage standard silicon CMOS manufacturing - using modified transistor structures that act as quantum…

Fujitsu, a Japanese IT and computing giant, has emerged as a serious player in quantum computing through a multi-pronged strategy spanning cutting-edge quantum hardware and quantum-inspired annealing solutions. The company is pursuing one of the most ambitious quantum roadmaps to date - developing a 10,000+ qubit superconducting quantum computer by…

Google is a frontrunner in the quest to build practical quantum computers. The company made headlines in 2019 by achieving quantum supremacy – using its 53-qubit Sycamore processor to perform in about 200 seconds a task that was estimated to require 10,000 years on a top supercomputer. This dramatic demonstration…

IBM has laid out one of the most detailed and aggressive quantum computing roadmaps in the industry. Over the past few years, IBM Quantum has consistently hit its interim milestones, expanding both the scale of its processors and the sophistication of its approach to quantum computing. As a long-time pioneer…

Infleqtion (formerly known as ColdQuanta) is a leading quantum technology company focused on gate-based quantum computing built on neutral atoms. By leveraging optically trapped atomic qubits, Infleqtion aims to deliver scalable, high-fidelity quantum processors with a clear path toward fault-tolerance and commercial utility. The company’s approach emphasizes large 2D qubit…

Intel’s quantum computing program has carved a distinctive path, marrying cutting-edge quantum research with the might of advanced silicon manufacturing. Over the past several years, Intel progressed from superconducting qubit test chips (17 and 49 qubits) to a focus on silicon spin qubits, culminating in the 12-qubit Tunnel Falls chip…

IonQ is a publicly traded leader in trapped‑ion quantum computing whose strategy is to reach useful fault tolerance with fewer physical qubits by maximizing fidelity, connectivity, and modularity. Rather than racing raw qubit counts in noisy regimes, IonQ’s thesis is that very clean ions (identical atomic qubits with long coherence…

IQM Quantum Computers is a Finland‑based hardware company building superconducting (transmon) quantum processors with a distinctly European strategy: deliver on‑premises systems tightly integrated with high‑performance computing (HPC) centers while co-designing architectures for error correction and, ultimately, fault tolerance. Rather than focus on cloud-only access or headline qubit counts, IQM emphasizes…

Microsoft’s quantum program is defined by a long‑bet on topological qubits - Majorana‑based devices designed to suppress errors at the hardware level - paired with a near-term, market-facing push through Azure Quantum. Publicly, Microsoft frames its roadmap in three phases: Foundational (prove and control Majorana modes), Resilient (demonstrate error-corrected logical…

Nord Quantique is a Canadian quantum computing startup (founded in 2020 in Sherbrooke, Quebec) focused on building fault-tolerant quantum computers through innovative hardware design. The company’s mission centers on overcoming the main bottleneck in quantum computing - quantum error correction - by integrating error resilience directly into the hardware architecture.…