Arqit

Arqit describes itself as a provider of quantum security solutions for enterprises and mission-critical sectors. Its website says its offerings address risks from future quantum attacks, including harvest-now-decrypt-later threats, by helping organizations discover vulnerable cryptography, protect networks, and document compliance. The company highlights telecoms, government and critical national infrastructure, defense, and U.S. markets as target sectors.

Arqit presents itself as a software-focused cybersecurity company rather than a quantum computing hardware developer. Its approach page says its platform is cloud-based, standards-based, and software only, with no new hardware required. Arqit states that its SKA-Platform manages endpoint interactions and that its products support post-quantum cryptography migration, key sovereignty, and network security through open interfaces and OEM integrations.