containerd is an open-source container runtime that runs as a daemon on Linux and Windows. According to the project's website, it manages the lifecycle of containers on a host: image transfer and storage, container execution and supervision, low-level storage and network attachments. It implements the OCI image and runtime specifications. containerd is distributed as software rather than as a hosted service, so organisations install and operate it on their own machines or in their own clusters.
containerd is a graduated project of the Cloud Native Computing Foundation (CNCF), which is part of the Linux Foundation, a US non-profit with its registered headquarters in Wilmington, Delaware. The code is licensed under Apache 2.0 and developed in the public GitHub repository of the containerd organisation. For a European organisation, the software is open source and can be audited, run and maintained in-house, while project governance sits with a US-based foundation. Organisations assessing the code should check the source, the published releases and the foundation's structure themselves.