Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.

Many of the most widely used Go projects are built using Cobra, such as: Kubernetes, Hugo, rkt, etcd, Moby (former Docker), Docker (distribution), OpenShift, Delve, GopherJS, CockroachDB, Bleve, ProjectAtomic (enterprise), Giant Swarm’s gsctl, Nanobox/Nanopack, rclone, nehm, Pouch, Istio, Prototool, mattermost-server, etc.