Cosine - Sovereign AI and autonomous coding for secure enterprise environments https://cosine.sh founders@cosine.sh

Cosine is the British sovereign AI lab and the creator of the leading autonomous agent built for defence, national security, and highly regulated industries. Built for fully air-gapped and high-security environments, Cosine writes, refactors, tests, and ships production-grade code across complex codebases, integrating directly with your tools.

Powered by our in-house ML research lab and backed by the UK Government’s Sovereign AI initiative, we are developing models that operate with zero dependence on foreign infrastructure. By post-training open-weight LLMs on proprietary human-reasoning and domain-specific data, Cosine consistently outperforms OpenAI’s GPT-5 and Anthropic on software-engineering benchmarks, delivering state-of-the-art capability.

Enterprises and critical infrastructure providers choose Cosine to eliminate strategic dependency risks. Deployable entirely within a customer’s VPC or fully on-premise with zero data egress, Cosine accelerates feature delivery, modernises legacy systems, and clears months of backlog in days – delivering world-class AI under fully sovereign control.