Arqit Quantum

End of the list of the largest software companies in the UK by market cap is Arqit Quantum Inc, a cybersecurity technology business established in 2017. The company offers a quantum encryption platform-as-a-service, which secures networked device communications links against attacks. QuantumCloud, the company's product, allows the device to download a lightweight software agent that creates keys in collaboration with another device.

Arqit's technology involves providing a lightweight software agent to end-point client devices or cloud machines in order to create zero-trust, computationally safe encryption keys. The proof of this capability was independently assured by the University of Surrey, a GCHQ Accredited Centre of Excellence for Cyber Security, and PA Consulting, as stated by Arqit in May 2022.

QuantumCloud is a scalable, policy-based system for safeguarding regional networks, mobile devices, IoT deployments, and blockchains. It is simple to set up and requires no infrastructure. QuantumCloud is able to develop unlimited volumes of keys in unlimited group sizes and control the secure entry and exit of a device in a group. The platform also solves the issues associated with traditional encryption techniques.

Founded: 2017
Headquarters: London, United Kingdom
Website: https://arqit.uk/