Aegiq

Aegiq is a UK-based full-stack photonic quantum computing company spun out from the University of Sheffield in 2019, developing secure quantum communications using III-V semiconductor-based quantum photonics chips manufactured with elements like Gallium, Indium, and Arsenic rather than traditional Silicon. The company secured £1.4 million in funding from Innovate UK and won a £30 million quantum testbed competition funded by the National Quantum Computing Centre to deliver Artemis, their compact photonic quantum computer. Building on over 20 years of world-class research in semiconductors and quantum science, Aegiq develops quantum technology for fiber-optic and satellite-based applications, focusing on secure quantum communications and photonic quantum computing with their dedicated user interface for integration with NQCC testbed ecosystem.

Arqit

Arqit is a quantum encryption technology company that has developed QuantumCloud, a unique software-only approach to creating quantum-safe encryption keys without requiring quantum hardware. Founded in 2017 by David Williams, the company went public in 2021 and provides quantum-safe encryption solutions to governments, enterprises, and telecommunications providers worldwide. Arqit’s technology creates encryption keys in satellite networks and distributes them globally, offering quantum-safe security that is impossible to predict, intercept, or decode. The company’s approach addresses the critical cybersecurity challenge posed by quantum computers, which threaten to break current encryption methods. Arqit has secured contracts with organizations including the UK Space Agency, European Space Agency, and various government departments, as well as partnerships with telecommunications companies and satellite operators. Their Federated Quantum System enables secure communications across ground, satellite, and space-based networks, positioning Arqit as a leader in quantum-safe security solutions for critical infrastructure and sensitive communications.

BAE Systems Quantum

BAE Systems has established quantum technology research and development programs focused on defense and security applications, developing quantum-enhanced radar and sensing systems, secure quantum communications networks, and quantum computing applications for intelligence analysis and cybersecurity. The company invests in quantum sensing technologies for improved navigation systems that operate in GPS-denied environments, quantum-enhanced imaging and detection systems for surveillance applications, and quantum cryptography solutions for secure military communications. BAE Systems collaborates with UK government quantum initiatives, academic research institutions, and quantum technology companies to advance quantum capabilities for national security applications, including quantum-resistant cryptography to protect against future quantum computing threats and quantum-enhanced electronic warfare systems for modern defense challenges.

Crypta Labs

Crypta Labs is a UK quantum security company founded in 2014 that specializes in quantum random number generation technology providing true quantum randomness for cryptographic applications, developing quantum entropy sources and random number generators that leverage quantum physical processes to produce unpredictable randomness essential for encryption keys, digital signatures, and secure protocols, serving cybersecurity companies, telecommunications providers, and organizations requiring certified high-quality entropy sources for quantum-safe cryptography and secure communications infrastructure.

Crypto Quantique

Crypto Quantique is a UK quantum security company founded in 2016 that develops quantum-driven IoT security solutions using quantum tunneling effects in semiconductor devices to generate unique cryptographic keys and device identities, providing hardware-based quantum random number generation and quantum-enhanced security for Internet of Things devices, edge computing systems, and connected infrastructure, enabling secure device authentication, encrypted communications, and tamper-resistant security solutions for smart cities, automotive, industrial IoT, and consumer electronics applications requiring quantum-grade security at scale.

Duality Quantum Photonics

Duality Quantum Photonics is a UK-based quantum technology company founded in 2020 that develops integrated quantum photonics circuits and components for quantum computing, quantum communications, and quantum sensing applications, specializing in silicon photonic chips that enable scalable photonic quantum systems with high integration density, providing essential building blocks for photonic quantum technologies including quantum light sources, quantum interferometers, and photonic quantum processors for researchers and companies developing quantum applications.

Element Six

Element Six is a UK synthetic diamond technology company established in 1946 that has become the world’s leading supplier of synthetic diamond materials for quantum technologies, producing ultra-pure single crystal diamonds with nitrogen-vacancy (NV) centers for quantum sensing, quantum computing, and quantum communication applications, providing specialized diamond substrates, quantum-grade diamond materials, and custom diamond solutions that enable quantum sensors, quantum memory devices, and quantum photonics components used by research institutions and quantum technology companies worldwide for applications requiring the unique properties of diamond’s quantum defects and exceptional material characteristics.

GSK Quantum

GlaxoSmithKline (GSK) is advancing quantum computing applications in pharmaceutical research through partnerships with IBM’s Quantum Heron and Condor processors for mRNA codon optimization and clinical data analysis, and collaboration with D-Wave for quantum annealing applications in genetic algorithms. The company worked with Capgemini UK and the National Quantum Computing Centre on quantum-enhanced drug discovery research, developing machine learning pipelines using quantum features for predicting targeted covalent drug reactivity. Led by Ross Walker, Global Director of Scientific Research Computing & Analytics, GSK participates in the QuPharm consortium alongside other major pharmaceutical companies to structure quantum computing’s potential in drug discovery, focusing on optimization problems that exceed traditional computational capabilities in messenger RNA research and therapeutic development.

KETS Quantum Security

KETS Quantum Security is a UK quantum communications company founded in 2016 as a University of Bristol spinout that pioneered the world’s first chip-to-chip quantum key distribution demonstration, developing miniaturized QKD devices manufactured in standard semiconductor foundries for integration into telecommunications networks, completing a £1.7 million government contract to develop security-hardened QKD prototypes for critical infrastructure including partnership with BT, increasing revenue over 70% year-on-year while expanding into defense, finance, and critical infrastructure sectors with quantum random number generators and chip-scale quantum encryption technologies.

M Squared Lasers

M Squared Lasers is a Glasgow-based photonics and quantum technology company founded in 2006 by Dr. Graeme Malcolm OBE and Dr. Gareth Maker, specializing in world-class laser, quantum, and photonics systems critical for fundamental physics research. The company has grown to become a global leader with roughly 100 employees, exporting more than 90% of its products and doubling in size every two years since 2012 with revenue of about £19 million. M Squared’s products have enabled breakthroughs in quantum science including the UK’s first commercially viable quantum accelerometer, quantum clocks, quantum sensors, and quantum computing systems for industrial applications. Dr. Malcolm, who was awarded an OBE for services to Science and Innovation, regularly provides expert evidence on quantum technology to parliamentary committees and has received numerous entrepreneurship awards for his leadership in advancing photonics and quantum technologies.

Mode Labs

Mode Labs is a University of Oxford spin-out company founded in 2021, specializing in continuous, remote, real-time chemical sensors using quantum sensing technologies. The company develops advanced quantum sensing solutions for environmental monitoring, industrial process control, and chemical detection applications that require high precision and continuous operation. Mode Labs leverages quantum physics principles to create sensors with unprecedented sensitivity and accuracy for chemical analysis, gas detection, and environmental monitoring applications across various industries including pharmaceuticals, petrochemicals, environmental science, and industrial manufacturing. The company’s quantum sensing platform enables remote monitoring capabilities and real-time data collection for applications requiring continuous chemical analysis and environmental monitoring.

Moth Quantum

Moth Quantum (MOTH) is a London and Basel-based technology company founded in 2022, pioneering quantum computing applications in the creative industries by building quantum-powered products and services for media and entertainment. The company launched RECURSE, the world’s first quantum-powered AI music track created in collaboration with electronic artist ILĀ, using their proprietary Archaeo platform that combines generative AI with quantum machine learning. Led by CEO Ilana Wisby (former Oxford Quantum Circuits CEO who helped raise $100 million), founder Harry Kumar as Chief Creative Officer, IBM quantum veteran James Wooton as Chief Scientific Officer, and Spencer Topel as CTO, MOTH develops quantum-powered music production tools including synthesizers, generative music models, and advanced audio-processing technology. The company’s mission focuses on supporting and enhancing artists rather than replacing them, making quantum technology accessible to creative professionals and consumers.

NQCC

The National Quantum Computing Centre (NQCC) is the UK’s flagship quantum computing research facility established in 2020 at the Harwell Science and Innovation Campus as part of the UK National Quantum Technologies Programme, bringing together leading quantum researchers, industry partners, and government agencies to advance quantum computing research and development, providing access to diverse quantum computing platforms, fostering collaboration between academia and industry, developing quantum software and applications, and serving as a central hub for the UK’s quantum computing ecosystem to accelerate practical quantum computing applications and maintain the UK’s leadership in quantum technologies.

Nu Quantum

Nu Quantum is a UK quantum networking company founded in 2018 as a University of Cambridge spinout that develops quantum photonic hardware including room-temperature single-photon sources and detectors for quantum networking applications, pioneering breakthrough Qubit-Photon Interfaces (QPIs) that enable 100x better entanglement rates than current lab state-of-the-art for distributed quantum computing networks, awarded £2.3 million UK government contract to deliver the world’s first modular rack-mount scalable quantum data center prototype with Cisco, building industrialized distributed quantum computing systems at the UK’s National Quantum Computing Centre using proprietary optical microcavity technology with micron-level precision and sub-80 picometre stability for quantum processor networking.

ORCA Computing

ORCA Computing is a University of Oxford spinout founded in 2019 that develops photonic quantum computers using single photons and linear optical quantum computing, creating quantum systems that can operate at room temperature without requiring complex cryogenic cooling, focusing on near-term quantum applications in optimization and machine learning through their cloud-accessible photonic quantum processors, working to demonstrate quantum advantage in practical applications while building partnerships with enterprises and research institutions seeking photonic quantum computing solutions.

Oxford Instruments

Oxford Instruments is a UK-based scientific instruments company founded in 1959 as the first commercial spin-out from Oxford University that has become a leading provider of cryogenic systems essential for quantum computing, developing the Proteox family of dilution refrigerators including the ProteoxQX modular systems exceeding 3 meters in height with scalable workspace for large quantum processing units, providing 25 µW cooling power at 20 mK temperatures and comprehensive I/O capacity for qubit scale-up, serving quantum computing companies like Oxford Quantum Circuits and Rigetti before selling their NanoScience quantum-focused division to Quantum Design for £60 million to focus on other scientific instrument applications.

Oxford Ionics

Oxford Ionics was spun out of Oxford University in 2019 by founders Chris Ballance and Tom Harty, developing breakthrough electronic qubit control technology for trapped ion quantum computers that uses standard semiconductor chips to control ions rather than expensive laser systems, enabling scalable quantum processor manufacturing and was acquired by IonQ for $1.075 billion in June 2025, representing the largest acquisition in quantum computing history and combining IonQ’s quantum computing stack with Oxford Ionics’ chip-based ion trap technology manufactured on standard semiconductor processes.

Oxford Quantum Circuits

Oxford Quantum Circuits (OQC) is a UK-based quantum computing company that develops superconducting quantum computers featuring innovative 3D architecture and proprietary Coaxmon qubit technology. Founded in 2017 by quantum computing pioneers from Oxford University, OQC has built Europe’s most advanced quantum computing systems, including their flagship Lucy processor with proprietary qubit designs that offer improved coherence and reduced crosstalk. The company’s unique 3D quantum computing architecture enables better connectivity and scalability compared to traditional planar approaches. OQC operates the UK’s first commercial quantum computing service and has established partnerships with organizations including the European Space Agency and various government initiatives. Their quantum computers are accessible through major cloud platforms, serving customers in optimization, machine learning, and scientific computing. OQC’s combination of cutting-edge hardware innovation, commercial cloud services, and strong European positioning makes them a key player in the global quantum computing ecosystem, particularly for organizations seeking alternatives to US-based quantum cloud providers.

Phasecraft

Phasecraft develops quantum algorithms specifically designed for materials modeling and condensed matter physics applications, focusing on creating quantum software that can efficiently simulate complex many-body systems and materials properties using near-term quantum devices to accelerate materials discovery and development.

Company Information

• Founded: 2018
• Country: UK
• Website: https://phasecraft.io
• Categories: quantum materials

Key People

Toby Cubitt (Co-founder, CEO), Ashley Montanaro (Co-founder, CTO)

Investment Information

• Status: private
• Total Raised: $50M
• Last Valuation: $200M

Recent Funding Rounds

• 2025-09-02: series-b - $34M - Series B funding for quantum algorithms and material discovery applications
• 2021-07-15: series-a - $16M - Series A funding round

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Plessey Semiconductors

Plessey Semiconductors is a UK-based leading developer of advanced optoelectronic technology solutions, operating as the UK’s only LED manufacturer and the only LED maker globally commercializing LEDs on silicon substrates using their award-winning proprietary GaN-on-Silicon platform. The company has connections to quantum technology through partnerships integrating Nanoco Technologies’ cadmium-free quantum dot semiconductor nanoparticle technology into their monolithic microLED displays for augmented reality and virtual reality applications. With leading-edge 150mm and 200mm wafer processing facilities in Plymouth and comprehensive photonic characterization laboratories, Plessey provides full-field emissive microLED displays combining high-density RGB pixel arrays with CMOS backplanes, with potential applications in optical processing units for AI operations that are faster and more energy-efficient than traditional silicon devices.

Post-Quantum

Post-Quantum is a UK cybersecurity company founded in 2009 that specializes in post-quantum cryptography solutions and quantum-safe security implementations, developing cryptographic libraries, security protocols, and migration tools that help organizations transition from classical encryption algorithms to quantum-resistant cryptography standards, providing post-quantum cryptographic software, security consulting services, and implementation support for enterprises, government agencies, and technology companies preparing for the quantum computing era when current encryption methods will become vulnerable to quantum attacks.

PQShield

PQShield is a UK-based post-quantum cryptography company founded in 2018 that specializes in quantum-resistant cryptography solutions, with researchers and advisory board members who co-authored multiple NIST-standardized algorithms including CRYSTALS-Dilithium, CRYSTALS-KYBER, Falcon, and SPHINCS+, being the first cybersecurity company to develop quantum-safe cryptography on chips with their PQPlatform IP and fully functional PQC silicon test chip, serving organizations across sectors with algorithm-agnostic implementations and $20 million in Series A funding to help enterprises transition to quantum-safe encryption ahead of the quantum threat.

QLM Technology

QLM Technology is a UK quantum sensing company founded in 2020 that develops quantum gas cameras and ultracold atom imaging systems for quantum research and quantum sensing applications, providing specialized detection and imaging equipment that enables researchers to visualize and characterize quantum states in ultracold atomic gases, supporting quantum computing research, quantum simulation experiments, and fundamental physics investigations that require precise detection and measurement of quantum many-body systems and quantum phase transitions in atomic gases at nanokelvin temperatures.

Quantinuum

Quantinuum formed in 2021 through the merger of Honeywell Quantum Solutions and Cambridge Quantum Computing to create the world’s largest integrated quantum computing company, combining industry-leading trapped-ion H-Series quantum computers with the highest quantum volume metrics alongside quantum software including lambeq, TKET, and InQuanto, employing over 480 people to deliver quantum advantage in cybersecurity, drug discovery, materials science, and financial modeling.

Company Information

• Founded: 2021
• Country: UK
• Website: https://quantinuum.com
• Categories: quantum processors, quantum cloud, quantum software

Key People

Ilyas Khan (Co-founder, Vice-Chairman, CPO), Tony Uttley (President, COO), Raj Hazra (CEO)

Quantum Dice

Quantum Dice is a UK quantum hardware company founded in 2019 that develops quantum random number generators using quantum tunneling effects in semiconductor devices to produce true quantum randomness, creating compact quantum entropy sources and random number generation hardware for cybersecurity, cryptography, and secure communications applications, providing quantum random number generators, entropy devices, and quantum-safe randomness solutions for telecommunications providers, cybersecurity companies, and organizations requiring certified high-quality entropy sources for encryption keys, digital signatures, and secure protocols that leverage quantum physical processes for unpredictable randomness generation.

Quantum Motion

Quantum Motion develops silicon-based quantum computers using CMOS technology and hot qubits that operate at higher temperatures than traditional quantum systems, founded by researchers from Oxford and UCL to create quantum processors that integrate with classical electronics using standard semiconductor manufacturing processes for cost-effective and scalable quantum computing.

Company Information

• Founded: 2017
• Country: UK
• Website: https://quantummotion.tech
• Categories: quantum processors

Key People

John Morton (Co-founder), Simon Benjamin (Co-founder)

Investment Information

• Status: private
• Total Raised: $67M
• Last Valuation: $250M

Recent Funding Rounds

• 2024-01-09: series-a - $50M - Series A funding for silicon quantum processors
• 2021-05-11: seed - $17M - Seed funding round

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Qureca

Qureca is a UK quantum education and workforce development company founded in 2019 that provides comprehensive quantum training programs, professional development courses, and recruitment services for the quantum technology industry, offering educational content ranging from quantum fundamentals to advanced quantum computing applications for professionals, students, and organizations looking to build quantum expertise, connecting quantum talent with employers across academia, industry, and government while developing curricula and certification programs that address the growing global demand for quantum-skilled professionals in quantum computing, quantum communications, quantum sensing, and related quantum technologies.

Rahko

Rahko applies quantum machine learning algorithms to drug discovery and pharmaceutical research, developing quantum-enhanced computational methods for molecular analysis, drug-target interactions, and compound optimization that leverage quantum computing’s potential advantages in exploring complex chemical space for therapeutic applications.

Company Information

• Founded: 2018
• Country: UK
• Website: https://rahko.ai
• Categories: quantum pharma

Key People

Nathan Brown (Co-founder, CEO), Leo Canas (Co-founder, CTO)

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Riverlane

Riverlane is a pioneering quantum computing software company focused on developing quantum error correction and operating system technologies essential for fault-tolerant quantum computing. Founded in 2016 by Steve Brierley, the company has built Deltaflow, a comprehensive quantum software platform that provides the classical infrastructure needed to control and manage quantum computers at scale. Riverlane’s technology addresses one of quantum computing’s most critical challenges: managing the complex classical computation required for quantum error correction in real-time. The company’s approach involves building specialized hardware and software systems that can process the massive amounts of syndrome data generated by quantum error correction codes. Riverlane has established partnerships with major quantum hardware companies and research institutions, working to standardize quantum error correction protocols and develop the software infrastructure for million-qubit quantum computers. As the quantum industry moves toward fault-tolerant systems, Riverlane’s expertise in quantum error correction positions them as a crucial enabler of practical quantum computing applications.

Rolls-Royce

Rolls-Royce explores quantum computing applications for aerospace and energy sectors, investigating quantum algorithms for engine design optimization, materials simulation, supply chain management, and predictive maintenance to enhance efficiency and performance in aviation and power generation systems.

Company Information

• Founded: 2021
• Country: UK
• Website: https://rolls-royce.com
• Categories: quantum software

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Universal Quantum

Universal Quantum develops modular trapped ion quantum computers with a unique architecture that allows individual ion trap modules to be connected via photonic links, enabling scalable quantum systems that can grow by adding modules while maintaining high-fidelity operations, founded by quantum computing researchers from the University of Sussex to target large-scale quantum computing applications.

Company Information

• Founded: 2018
• Country: UK
• Website: https://universalquantum.com
• Categories: quantum processors

Key People

Sebastian Weidt (Co-founder, CEO), Winfried Hensinger (Co-founder)

Zero Point Motion

Zero Point Motion is a UK quantum technology company founded in 2020 that develops quantum inertial navigation systems and quantum accelerometers for precision navigation applications where GPS is unavailable, creating compact quantum sensors that leverage cold atom interferometry and atomic physics to provide ultra-precise measurements of acceleration and rotation for autonomous vehicles, submarines, aircraft, and spacecraft requiring navigation-grade performance in GPS-denied environments, offering quantum sensing solutions that maintain long-term navigation accuracy without external reference signals through atomic-scale precision measurements.