Rigetti Computing is a quantum computing company based in Berkeley, California.

Pasqal is a company building programmable quantum simulators and quantum computers made of 2D and 3D arrays of neutral atoms.

HYPRES is a developer of superconducting microelectronics for defense, wireless, and optical network industries.

NanoSonic Inc. is a Pembroke, VA-based advanced materials company specializing in thermal management solutions (such as thermal arrays) and related safety equipment

D-Wave Systems is a Canadian company that designs and manufactures quantum computing and superconducting electronics, and AI software.

Quandela is a Paris-based company developing optical quantum technology integrated into photonic chips.

Multiverse Computing is a Spanish startup developing quantum and AI business solutions.

Crypto Quantique is a company that specializes in quantum cyber security.

A company offering a platform for privacy and security for quantum cloud computing.

Quantum computing software company building an engine for the simulation of microscopic systems, with the goal of replacing expensive laboratory tests with computer simulation.

Horizon Quantum Computing is a Singapore-based company developing quantum software development tools founded in 2018.

Quantum Circuits Company is a company that is aiming to develop, manufacture, and sell the first practical and useful quantum computer using superconducting qubits. It is based in New Haven, Connecticut and founded in 2015 by Robert J. Schoelkopf, Michel Devoret, Luigi Frunzio and Brian W. Pusch.

Zapata Computing is a company developing quantum software and algorithms for business founded in 2017 by Christopher Savoie, Alán Aspuru-Guzik, Jhonathan Romero Fontalvo, Jonathan Olson, Peter Johnson and Yudong Cao.

Rahko is a company that is developing a quantum discovery platform for the chemical simulations.

Qnami is a quantum technology company that is developing and commercializing quantum sensing and quantum imaging technologies using synthetic diamond and quantum technologies. Qnami's products are in life-science R&D and semiconductor electronics.

ID Quantique is a company developing quantum cybersecurity products, quantum scientific instrumentation, and quantum random number generation.

PsiQuantum is a company that is building a general-purpose silicon photonic quantum computer.

Q-CTRL is a company that develops software for quantum technologies.

ISARA is a company developing quantum computer resistant software products founded in 2015 by Scott Totzke.

Xanadu is a company developing quantum computing and artificial intelligence technologies.

IQM is a company utilizing superconducting technology to build scalable quantum computing hardware.

Company developing and designing components and systems for scientific and industrial quantum applications.

QC Ware Corp. is a company that offers quantum computing software solutions for enterprises.

A quantum computing software company that partners with industry and academia to build computer applications that can improve with advances in both quantum and classical computing. The company’s mission is to apply computation breakthroughs to machine intelligence and optimization science using their hardware-agnostic software platform.

Qunnect is a quantum communication company that is developing room-temperature, portable, modular technologies to support optical, long-distance and quantum-secured communication.

Aliro Technologies (Aliro), a spinout of the NarangLab at Harvard University, makes software that facilitates user access to present day quantum computers.

Entropica Labs is a company developing quantum computing and AI tools for bioinformatics and genomics.

QuSecure is a Menlo Park, California-based cybersecurity company that is developing quantum security applications, it was founded in 2019 by Skip Sanzeri, Rebecca Krauthamer, Dave Krauthamer, and Kosta Vilk.

InfiniQuant is a research team hosted in Christoph Marquardt’s Quantum Information Processing group at the Max Planck Institute for Science and Light.

A company developing cryogenic cooling solutions for research, material science, quantum computing, high-performance electronics, and detector applications.

Post-Quantum is a company that is developing quantum-resistant encryption for protection against code-breaking quantum computers and quantum-resistant signature schemes for secure blockchain deployment.

Atom Computing Inc. manufactures scalable quantum computers out of individual atoms.

QuiX is a company that makes a room temperature photonic quantum processor based on silicon nitride waveguides.

PhaseCraft is company that is developing fundamental quantum theory and software for quantum computers.

Crypta Labs is quantum security startup that is developing a quantum-based encryption chip and software to secure the Internet of Things. The company developed a Quantum Random Number Generator (QRNG) for mobile devices and an integrated security chip for others. The company is targeting transport, military and medical markets.

Quantum Thought offers an incubator for the creation of quantum computing applications.

Quantum Benchmark is a company that is developing quantum software solutions for overcoming quantum computing errors.

Quantum Xchange is a quantum fiber network that is based in the United States. It uses photons of light to physically transfer a shared secret between two entities.

QxBranch is a data analysis and quantum computing software company.

Company developing optical communications hardware for strong digital encryption.

Founded by experts in quantum physics and semiconductors, Equal1 aims to democratise quantum computing by making it accessible and affordable with its innovative quantum silicon technology.

NetraMark is a Toronto-based machine learning software company founded by Joseph Geraci in 2015.

A quantum computing company using ion trap technology to develop commercial quantum computers.

Company building "quantum accelerators” a type of computing system that work in conjunction with classical computers to solve problems that are impractical or impossible to solve on classical computer alone.

Qu & Co is a company that offers quantum-computational chemistry as-a-service.

SpeQtral is a company that is interested in developing quantum communication technologies

ArQit is working to provide the world's first global quantum encryption SaaS Business. They will use QKD technology to create unique keys that can be shared between two parties using laser transmissions from a satellite. The company is based in London, England and was founded in 2017.

A company using quantum computing and machine learning to design proteins.

A company developing a scalable and modular quantum computer powered by photonics.

GTN uses machine learning and quantum physics technology to simulate, analyse and discover chemicals computationally.

Strangeworks is a company offering a hardware-agnostic quantum computing platform founded in 2018 by Whurley.

Quantum Motion is a company that develops scalable arrays of qubits using CMOS silicon processes.

Quantum Machines is a company that is developing operations and control systems for quantum computers.

Cambridge Quantum Computing (CQC) was a quantum computing company with expertise in Quantum Information Processing, Artificial Intelligence, Optimization, and Pattern Recognition. In December 2021, the company merged with Honeywell Quantum Solutions (HQS) to form Quantinuum.

Company developing light-speed optical processors and AI systems.

HQS Quantum Simulations Company is a Karlsruhe-based company developing quantum computing software and algorithms for predicting the properties of performance materials, specialty chemicals, and pharmaceutical companies.

Qulab is a company that uses classical and quantum computing to automate molecular drug design.

A company making quantum electronic design automation toolkits for designing and optimizing nano and quantum electronics.

QEYnet is a company that develops cybersecurity software to defend against quantum computers.

ProteinQure is a biotechnology company using quantum computing for molecular simulations and drug discovery.

SeeQC is a company developing and commercializing quantum technologies founded in 2019.

Ostendo Technologies is a Carlsbad, California-based company founded in 2005 by Armagan Ergun.

Nu Quantum is a company developing quantum security technology founded in 2018 by Dr Carmen Palacios-Berraquero, Yuri Andersson, Matthew Applegate and Mete Atature.

Qubitekk is a company that is making quantum technologies for scientists, engineers, and developers.

Beit.tech is a company that designs and implements an algorithm for solving an all relevant NP-complete class of problems.

QunaSys is a Bunkyo, Tokyo-based information technology company.

Pqshield Limited is an Oxford-based cryptography company using their cryptographic knowledge to develop cybersecurity solutions.

Sigma-i is a Sendai-based company founded in 2019 by Masayuki Ohzeki, Masamichi Miyama and Kentaro ISE.

Oxford Quantum Circuits develops quantum computer superconducting circuits and Josephson junctions.