Cosine is a UK-based AI research lab that trains AI models and specialised coding agents for organisations that need advanced capability inside secure environments. According to its website, the offer includes a cloud option, a command-line interface and the Lumen model family: Lumen Scout and Lumen Outpost are named, and Lumen Sovereign is listed as coming soon. The site says Scout and Outpost are post-trained from third-party base models, Devstral and Kimi.
Cosine describes itself as a UK company; its legal entity, founding date and investors are not stated on the website. The company also says it can run systems entirely inside a customer's own security perimeter, on premises and cut off from the public cloud. The site does not say where its cloud service stores data. For a European organisation, the contracting entity, the hosting location of the cloud option and the licences of the underlying base models are therefore the points to check. Being based outside the EU, the company's transfer and data-protection terms should be assessed on their own merits.