Arqit Quantum

ORCA Computing builds photonic quantum computers that operate at room temperature, eliminating the need for cryogenic cooling. Using quantum memories based on telecom-wavelength photons, ORCA's approach is designed for integration into existing data center and telecommunications infrastructure. The company has contracts with the UK Ministry of Defence and is part of the NVIDIA CUDA-Q partner ecosystem.

OQC is a UK-based superconducting quantum computing company known for its proprietary Coaxmon qubit architecture, which uses 3D coaxial cavity structures for improved coherence and scalability. OQC provides cloud access to its quantum systems and has partnerships with Amazon Braket for cloud deployment. The company has raised significant funding and focuses on making quantum computing commercially accessible, with an emphasis on enterprise applications.

Universal Quantum, spun out of the University of Sussex, takes a distinctive approach to trapped-ion quantum computing by using microwave-driven gates (rather than lasers) and electronic interconnects to link multiple ion trap modules. This approach is designed for million-qubit scalability. The company partnered with Atlas Copco to industrialize vacuum systems for quantum computers and has received significant UK government and EU funding.

Riverlane is the global leader in quantum error correction technology, developing Deltaflow — a real-time QEC stack with proprietary chips, decoders, and compilers that works across all qubit modalities. Deltaflow 2 was installed at Oak Ridge National Lab in 2025, the first dedicated real-time QEC integration at a U.S. national lab. In 2026, Riverlane demonstrated 16.32µs QEC latency — a fourfold improvement over Google's Willow benchmark. The company partners with over 60% of the world's quantum computer companies.