Quantum Technology defence companies in the UK

Builds quantum networking hardware that connects quantum processors into distributed computing architectures, enabling commercial-scale quantum computing.

Quantum Networking Unit (QNU)

A 19-inch rack-mount system hosting photonic integrated circuits that distributes quantum entanglement across connected processors. Launched in June 2025, the QNU provides reconfigurable connectivity between quantum computing nodes for datacenter-scale quantum architectures. Nu Quantum describes it as the world's first product of its kind, delivering 99.7% entanglement fidelity at a 1 MHz attempt rate.

Entanglement Fabric

Nu Quantum's distributed quantum computing architecture, combining its networking hardware with a software abstraction layer for qubit-agnostic application development. The Entanglement Fabric defines how modular quantum processors interconnect and scale, and is the overall framework that the QPI and QNU are designed to populate.

Designs memory-safe semiconductors with post-quantum cryptography for securing servers, edge devices and critical infrastructure against both current and quantum-era threats.

Builds miniaturised cold atom quantum hardware for GPS-independent navigation, timing and sensing in defence, telecoms and critical infrastructure.

Full-stack photonic quantum computing company developing quantum technologies for defence, aerospace, cybersecurity and communications applications. Provides quantum computing platforms, quantum communication systems, and quantum cryptography solutions.

Builds quantum-safe encryption software that protects government, defence and telecoms networks from current cyber threats and future quantum computing attacks.

Craft Prospect builds small-satellite systems, onboard AI and quantum-secure space technologies for secure, autonomous space missions.

Builds chip-based quantum key distribution (QKD) and quantum random number generation (QRNG) hardware for securing defence, telecoms and critical infrastructure against quantum-era threats.

Award-winning quantum technology spinout from Oxford University developing quantum random number generators (QRNGs) that provide verifiably secure random numbers for cybersecurity applications.

Hardware-based ultra-low-latency encryption for data in motion, including the SAFE Series delivering 200 Gbps full duplex throughput and post-quantum crypto-agility. Raised £7.5M Series A in 2025 and supplies government, critical infrastructure, and telecom networks.