OSISM is a platform for building, managing and operating cloud infrastructure. It combines OpenStack, Ceph, Kubernetes and surrounding tools, which are tested together for each release. The design is modular, so components can be replaced or added. According to the vendor it is aimed at public administrations, state data centres, universities, regulated industries, utilities and cloud providers. A subscription covers, among other things, security patches, quality assurance, documentation and help with updates and upgrades. Air-gapped operation and end-to-end encryption are also mentioned.
OSISM GmbH is based in Mühlacker, Germany; its website names no parent company. Organisations can run the cloud themselves or have it operated, including through partners. Where customer data is stored is not published and depends on the infrastructure chosen, so ask the vendor. The core consists of open-source components, but the stack also uses proprietary partner components where needed. The licence of OSISM itself is not stated on the website.