# Quantum companies in United Kingdom Compare quantum companies with an address in United Kingdom. Confirm service areas and capabilities before you engage. 18 quantum companies. Also on the [web page](https://quantumcompanies.fyi/gb). ## Quantum companies 1. [BAY Photonics](https://quantumcompanies.fyi/gb/england/brixham/bay-photonics.md), Quantum components, Freshwater Quarry, Brixham Laboratory, Brixham Tq5 8Ba, Brixham: Specializes in photonic assembly and packaging for quantum, sensing, and telecom applications, from prototype to production. 2. [Helia Photonics](https://quantumcompanies.fyi/gb/wln/livingston/helia-photonics.md), Quantum components, 2a ROSEBANK ROAD, ROSEBANK, Livingston: Provides III-V and silicon photonics back-end-of-line processes, thin-film optical coatings, and quantum technology coatings and back-end processing. 3. [Quantum Detectors Ltd.](https://quantumcompanies.fyi/gb/england/oxford/quantum-detectors-ltd.md), Quantum sensing and metrology, R103, Fermi Avenue, Harwell Campus, Oxford: Develops advanced direct electron detectors and readout systems for electron microscopy and X-ray research. Products include MerlinEM, Merlin T4, and Xspress 3… 4. [RedWave Labs](https://quantumcompanies.fyi/gb/england/didcot/redwave-labs.md), Quantum components, Didcot: Designs and manufactures custom photonics control electronics; developing quantum key distribution receivers, single photon detectors and a master controller… 5. [Aquark Technologies Ltd](https://quantumcompanies.fyi/gb/england/southampton/aquark-technologies-ltd.md), Quantum hardware, Southampton: Builds miniaturised cold-atom quantum hardware for sensing, timing and spectroscopy, drawing on quantum physics, vacuum engineering, microfabrication and… 6. [Arqit](https://quantumcompanies.fyi/gb/england/london/arqit.md), Post-quantum cryptography vendors, London: Provides quantum-safe encryption products and PQC migration tooling, including software-defined encryption for telecom, government and critical infrastructure,… 7. [Craft Prospect](https://quantumcompanies.fyi/gb/england/glasgow/craft-prospect.md), Quantum networking and QKD, Glasgow: Small satellite company leading the ESA/UKSA-supported OPS-SAT VOLT mission; offers a 6U CubeSat quantum key distribution payload using the BB84 protocol and a… 8. [CryoCoax](https://quantumcompanies.fyi/gb/england/cirencester/cryocoax.md), Quantum components, Cirencester: Division of Intelliconnect making cryogenic RF cables, cable assemblies, connectors and components for quantum computing, space, defense and research… 9. [Cryogenic Limited](https://quantumcompanies.fyi/gb/england/london/cryogenic-limited.md), Quantum components, London: Supplies high-field superconducting magnets and cryogen-free low-temperature measurement systems down to 10 mK, with in-house manufacturing; products include… 10. [KETS Quantum Security](https://quantumcompanies.fyi/gb/england/bristol/kets-quantum-security.md), Quantum networking and QKD, Bristol: Develops chip-based quantum security products including quantum key distribution and quantum random number generators for defense, finance, critical… 11. [Mesa Quantum](https://quantumcompanies.fyi/gb/england/london/mesa-quantum.md), Quantum sensing and metrology, London: Develops mass-manufacturable, chip-scale quantum sensors on a neutral-atom platform, including VCSEL atomic clocks, RF magnetometers and atomic spin gyroscopes… 12. [Nu Quantum](https://quantumcompanies.fyi/gb/england/cambridge/nu-quantum.md), Quantum networking and QKD, Cambridge: Builds quantum networking technology to scale quantum computers by weaving processors into interconnected, modular architectures; its Entanglement Fabric… 13. [ORCA Computing](https://quantumcompanies.fyi/gb/england/oxford/orca-computing.md), Quantum hardware, Oxford: Builds photonic quantum computers, including the PT Series and PT-3, designed to integrate with existing data centres and GPUs for hybrid quantum-classical AI… 14. [Photon Force](https://quantumcompanies.fyi/gb/england/edinburgh/photon-force.md), Quantum components, Edinburgh: Designs and manufactures single-photon sensitive cameras and sensors with time-resolved single-photon counting; serves quantum applications and quantum optics… 15. [QPICs](https://quantumcompanies.fyi/gb/scotland/glasgow/qpics.md), Quantum components, Glasgow: Pure-play foundry fabricating quantum photonic integrated circuits with 3-4 week turnaround and flexible waveguide materials; operates a turnkey fab at the… 16. [Riverlane](https://quantumcompanies.fyi/gb/england/england/riverlane.md), Quantum software and algorithms, England: Riverlane develops quantum error correction (QEC) technology, including the Deltaflow real-time QEC system, Deltakit open-source software, and proprietary QEC… 17. [Universal Quantum](https://quantumcompanies.fyi/gb/england/haywards-heath/universal-quantum.md), Quantum hardware, Hayward's Heath: Trapped-ion quantum computing company building utility-scale quantum computers on a modular blueprint; raised over $100m Series A. 18. [Wave Photonics](https://quantumcompanies.fyi/gb/england/cambridge/wave-photonics.md), Quantum components, Cambridge: Provides rapid photonic integrated circuit design technology, PDKs, design services, packaging and measurement services for telecommunications, quantum,… ## Nations - [England](https://quantumcompanies.fyi/gb/england.md): 16 quantum companies - [Scotland](https://quantumcompanies.fyi/gb/scotland.md): 1 quantum company - [WLN](https://quantumcompanies.fyi/gb/wln.md): 1 quantum company ## Cities - [London, England](https://quantumcompanies.fyi/gb/england/london.md): 3 quantum companies - [Cambridge, England](https://quantumcompanies.fyi/gb/england/cambridge.md): 2 quantum companies - [Oxford, England](https://quantumcompanies.fyi/gb/england/oxford.md): 2 quantum companies - [Bristol, England](https://quantumcompanies.fyi/gb/england/bristol.md): 1 quantum company - [Brixham, England](https://quantumcompanies.fyi/gb/england/brixham.md): 1 quantum company - [Cirencester, England](https://quantumcompanies.fyi/gb/england/cirencester.md): 1 quantum company - [Didcot, England](https://quantumcompanies.fyi/gb/england/didcot.md): 1 quantum company - [Edinburgh, England](https://quantumcompanies.fyi/gb/england/edinburgh.md): 1 quantum company - [England, England](https://quantumcompanies.fyi/gb/england/england.md): 1 quantum company - [Glasgow, England](https://quantumcompanies.fyi/gb/england/glasgow.md): 1 quantum company - [Glasgow, Scotland](https://quantumcompanies.fyi/gb/scotland/glasgow.md): 1 quantum company - [Hayward's Heath, England](https://quantumcompanies.fyi/gb/england/haywards-heath.md): 1 quantum company - [Livingston, WLN](https://quantumcompanies.fyi/gb/wln/livingston.md): 1 quantum company - [Southampton, England](https://quantumcompanies.fyi/gb/england/southampton.md): 1 quantum company ## Categories - [Quantum components](https://quantumcompanies.fyi/category/quantum-components.md) - [Quantum hardware](https://quantumcompanies.fyi/category/quantum-hardware.md) - [Quantum networking and QKD](https://quantumcompanies.fyi/category/quantum-networking.md) - [Quantum sensing and metrology](https://quantumcompanies.fyi/category/quantum-sensing.md) - [Post-quantum cryptography vendors](https://quantumcompanies.fyi/category/post-quantum-cryptography.md) - [Quantum software and algorithms](https://quantumcompanies.fyi/category/quantum-software.md)