Quantum Computing Startups

Qubic develops quantum microwave systems based on superconducting circuits that generate entangled signals and filter noise to detect, image, and communicate with signals otherwise hidden in ambient noise. Its technology targets remote sensing and telecommunications applications such as drone detection and covert communications.

3 investors

Qubitcore develops fault-tolerant universal quantum computers using proprietary ion trap technology integrated with optical microcavities to build scalable quantum processor networks connected via optical links. The company, based on research from the Okinawa Institute of Science and Technology (OIST), focuses on distributed ion-trap quantum computing systems.

3 investors

Quantum Bridge develops quantum-safe key distribution technology for protecting critical infrastructure and sensitive data against cyber threats. Its solution combines Post-Quantum Cryptography (PQC), Quantum Key Distribution (QKD), and a patented Distributed Symmetric Key Establishment (DSKE) protocol for organizations securing their network environments.

3 investors

QuEra develops neutral-atom quantum computers, building both the quantum hardware and the classical control systems that operate them, along with related software and applications. It serves enterprise customers, high-performance computing centers, and government agencies worldwide, including deployments in Japan's national quantum program.

3 investors

QuintessenceLabs provides post-quantum cryptography tools and quantum key distribution solutions to protect data encryption against threats from quantum computers. The company serves enterprises and financial institutions seeking crypto-agile key management and quantum-resistant security for sensitive data.

3 investors

Qunnect develops room-temperature hardware for building scalable quantum networks over existing telecommunications infrastructure. The company operates in the quantum networking and deep-tech hardware space.

3 investors

Quobly develops silicon-based quantum computers built on standard semiconductor manufacturing (300 mm wafers), producing rack-scale, data center-ready systems aimed at fault-tolerant, million-qubit machines. Its quantum computers target industrial applications in fields such as chemistry, materials science, optimization, and logistics.

3 investors

QuSecure provides a cryptographic management platform that discovers, remediates, and reports on encryption across cloud, on-premises, and legacy systems. The platform enables organizations to modernize their cryptography and transition to post-quantum encryption standards for enterprise and government customers.

3 investors

Sitehop provides hardware-enforced, FPGA-powered encryption solutions for data in motion, delivering quantum-ready security with ultra-low latency for telecommunications, critical infrastructure, financial services, and enterprise networks.

3 investors

SpeQtral develops quantum key distribution technology for secure communications, offering both satellite-based and fiber-optic terrestrial solutions to protect critical infrastructure against quantum computing threats. The company serves telecommunications providers, governments, healthcare, and financial institutions seeking quantum-safe networks.

3 investors

Adamant Quantum develops chip-scale quantum sensors and timing components based on synthetically grown diamonds with engineered crystal defects, used for sensing, navigation, communication, and metrology. Its products include a diamond-based chip-scale atomic clock offered as a commercially available frequency reference for applications across land, sea, space, and aerospace.

2 investors

AQuark Technologies develops miniaturised quantum hardware based on cold-atom sensing and timing technologies, using expertise in vacuum engineering, micro-fabrication, and photonics. Its compact, energy-efficient quantum devices target applications in navigation, communication, security, medical diagnostics, and resource exploration outside controlled lab settings.

2 investors

Bifrost Electronics develops miniaturized cryogenic hardware, including quantum-limited amplifiers, to help pack more qubits into a dilution refrigerator and scale quantum computers. It serves quantum computing researchers and physicists building QPUs.

2 investors

Big Sur Ventures is an early-stage venture capital firm that has invested since 2012 in technology startups from pre-seed through Series A. It backs companies in internet/software ("Power of Internet") and deep tech areas such as quantum, AI, materials, photonics, microelectronics, and nanotechnology.

2 investors

Casimir develops technology to extract usable energy from the quantum vacuum through Casimir cavities, aiming to create a novel power source for applications including advanced propulsion and energy generation. The company applies quantum physics research to produce practical energy systems.

2 investors

CogniFrame develops hybrid classical-quantum computing solutions using machine learning and quantum optimization or simulation to solve NP-hard problems for institutions in sectors such as financial services and health care. It offers FirstQ, an aggregator quantum app store with pre-built use cases plus access to production-grade Ising solvers and gate simulators for developers.

2 investors

Commutator Studios offers a tool that automatically optimizes quantum applications by finding the best execution parameters across different quantum computers, reducing errors and improving accuracy, reliability, and performance. It serves organizations running quantum circuits on real quantum hardware.

2 investors

Dipole Labs develops photonic (optical) hardware intended to serve as the optical layer for AI and quantum computing infrastructure, aiming to overcome the physical limits of silicon in speed, density, and efficiency. The company targets AI and quantum infrastructure providers.

2 investors

Diraq develops quantum computers based on modified silicon transistors, aiming for utility-scale quantum processing units the size of a single data-center rack. The company focuses on scaling to millions of qubits with error-corrected operations.

2 investors

eleQtron develops and operates trapped-ion quantum computers using its MAGIC (Magnetic Gradient Induced Coupling) technology, which controls qubits with microwave technology rather than lasers. It targets commercial and research applications such as materials research, logistics, pharmaceuticals, and financial risk management, serving companies, institutions, and scientific organizations, and is a German quantum computing hardware manufacturer.

2 investors

Equal1 builds rack-mounted quantum computers (RacQ) using silicon CMOS-based quantum processors (UnityQ) that run alongside existing CPU and GPU compute in standard data center racks. Its systems target hybrid quantum, classical and AI workloads such as molecular simulation, optimization, quantum AI training, and Monte Carlo risk and pricing models.

2 investors

EuQlid builds magnetic imaging technology that uses quantum defects in diamond to non-invasively map buried electrical currents and identify connectivity defects in materials and devices. Its Quantum Diamond Microscope serves semiconductor advanced packaging, silicon 3D architectures, and energy storage/battery applications for metrology and defect analysis.

2 investors

Foqus Technologies develops software that uses quantum algorithms and AI to enhance MRI scans, aiming to increase magnetic resonance sensitivity, shorten scan times, and improve image quality without hardware upgrades. Its FDA 510(k) cleared and Health Canada licensed solution targets medical imaging for diagnosis and treatment monitoring.

2 investors

Lastwall provides a zero-trust identity-as-a-service (IDaaS) platform with post-quantum resilient authentication, public key infrastructure, and single sign-on to secure access to systems, cloud infrastructure, and IT networks. It serves defense, government, and critical infrastructure organizations, and has partnered with the U.S. Department of Defense and Defense Innovation Unit since 2017.

2 investors