runC is a CLI tool for spawning and running containers according to the OCI specification. Containers are started as a child process of runC and can be embedded into various other systems without having to run a daemon. runC is built on libcontainer, the same container technology powering millions of Docker Engine installations. runC does not force you to have a particular workflow or deployment setup, it only requires a root filesystem and configuration. Docker images can be run with runC.