Quantum Computing Startups

iSentroniq develops dense, near-heatless cryogenic wiring aimed at overcoming scalability limits in quantum computing hardware. The technology is designed to fit significantly more qubits within existing cryogenic infrastructure.

5 investors

Kara engineers single-crystal diamond, handling growth in its own reactors as well as processing and characterization in-house. Its diamond materials target thermal management, power electronics, quantum sensing, photonics, quantum networks, and characterized research substrates.

5 investors

Kiutra develops cryogenic cooling systems for quantum technologies, offering alternatives to helium-3-based solutions through continuous adiabatic demagnetization refrigeration (cADR). The company serves quantum computing, sensing, and communication researchers and enterprises with hardware products and characterization services.

5 investors

Lightsynq develops optical quantum interconnects using integrated diamond photonic circuits to enable scaling of fault-tolerant quantum computers. The company serves quantum computing system builders seeking solutions to address interconnectivity bottlenecks in large-scale quantum systems.

5 investors

Maybell Quantum designs and manufactures dilution refrigerators for quantum computing research, including its Fast Fridge product offering base temperatures below 10mK/30mK. The company targets quantum researchers and labs, emphasizing reliability, front-opening access, and low-noise experimental environments.

5 investors

Nord Quantique develops error-corrected quantum computers using superconducting bosonic codes that embed error correction at the hardware level to achieve a 1:1 logical-to-physical qubit ratio. The company builds rack-scale quantum computing systems designed to fit in existing data centres rather than requiring large industrial facilities.

5 investors

OptQC develops optical quantum computers aimed at practical societal implementation, addressing energy efficiency and computational capacity limits through a scalable photonic approach to quantum computing.

5 investors

Oratomic builds fault-tolerant quantum computers using ultra-efficient error correction with light and atoms. The company aims to create utility-scale quantum systems for applications in artificial intelligence and scientific discovery.

5 investors

Phasecraft develops quantum computing systems and software by combining quantum information theory, materials science, and engineering to advance practical quantum advantage. The company serves organizations seeking to apply quantum computing to real-world problems.

5 investors

Photonic is developing a commercial-scale, fault-tolerant quantum computer based on silicon T centres, using a distributed architecture designed for manufacturability and scaling. The company targets quantum computing applications such as drug discovery, financial modelling, cryptography, logistics, materials science, and climate simulation.

5 investors

Polygence is an online mentorship platform that pairs high school students with expert mentors for self-directed research projects across any academic discipline. The company serves students seeking intellectual exploration beyond traditional school curricula.

5 investors

QpiAI builds quantum computing hardware and software, including superconducting quantum processor chips and quantum computers, alongside enterprise AI and Gen-AI tools. It offers a hybrid quantum-classical stack and developer platform for enterprises in industries such as life sciences, automotive, finance, healthcare, and manufacturing.

5 investors

Quantum Systems (QS) develops photonic quantum computing technology based on deterministic generation of photons and entangling gates, aiming to make practical, affordable quantum computers more widely accessible. The company builds on research from the Weizmann Institute of Science and recent advances in photonic technologies.

5 investors

QuantWare designs and manufactures quantum processors (QPUs) for industrial applications. The company is building KiloFab, a production facility to scale quantum processor manufacturing.

5 investors

Quantum Bridge develops quantum-safe communication technology to protect internet communications against classical and quantum threats, working on quantum entanglement generation and quantum repeaters. A University of Toronto spin-out, it serves businesses and governments seeking future-proof cryptographic security.

5 investors

ZuriQ develops quantum computing hardware based on a three-dimensional trapped-ion architecture designed for scalable qubit systems while preserving connectivity and operation fidelity. The company targets industrial quantum computing applications such as drug discovery.

5 investors

Anametric develops chip-scale quantum photonic (QPIC) devices for cybersecurity applications, drawing on semiconductor design expertise and research commercialized through a partnership with Southern Methodist University. The company works with the Air Force Research Lab and Army Research Lab on quantum photonic chip designs and is developing its first generation of quantum photonic products.

4 investors

Quantum magnetometer-based, GPS-free navigation systems delivering spoof-resistant positioning for defense, aviation and drones.

4 investors

Innovate UK is a government-backed community platform that connects investors, innovators, industries, institutes, and government bodies to fund and scale solutions in emerging technologies and innovation sectors. The platform focuses on financing the Future Economy with emphasis on Net Zero, Health, Agriculture, Digital Technologies, and Diversity and Inclusion across the UK and international markets.

4 investors

KETS develops chip-based quantum-safe encryption and networking solutions to protect digital infrastructure from emerging security threats. The company's products are used across telecommunications networks and demonstrated in field applications including drone and satellite systems.

4 investors

Oxford Quantum Circuits (OQC) develops and operates superconducting quantum computers for commercial and strategic applications, offering Quantum-Compute-as-a-Service and integrating quantum systems directly into commercial data centres. It serves enterprise customers with deployments across the UK, US, Japan, and Spain.

4 investors

PQShield develops post-quantum cryptography (PQC) products, including optimized software libraries, SDKs, OpenSSL integration layers, and lattice-based hardware IP cores, to help organizations migrate systems to quantum-resistant cryptography. Founded as a University of Oxford spin-out, it serves industries such as semiconductors, telecommunications, automotive, industrial IoT, defense, aerospace, healthcare, and enterprise platforms.

4 investors

QuantrolOx develops machine learning software to automatically characterise, tune, and control quantum devices, serving quantum labs, research sites, and quantum computing platforms. The company operates in the quantum technology and deep tech space.

4 investors

Quantum Dice develops a scalable probabilistic computing platform using quantum photonic technology to address energy-intensive AI models and complex industrial optimization problems. The company spun out from Oxford University's physics department and commercializes patented quantum randomness sources initially deployed in cybersecurity applications.

4 investors