# Juju

> Juju is an open source orchestration engine for deploying, integrating, and managing applications across Kubernetes, VMs, and bare metal using software operators called charms.


2026 CC-BY-SA, Canonical Ltd.

## Pages in this subsection

- [Charm](https://documentation.ubuntu.com/juju/4.0/reference/charm.md): Complete Juju charm reference: operators for deploying applications. Learn charm taxonomy, structure, lifecycle, and Charmhub integration.
- [Charm maturity](https://documentation.ubuntu.com/juju/4.0/reference/charm/charm-maturity.md): Understand charm maturity stages, quality requirements, and capabilities for building reusable, production-ready charms with Juju.

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/juju/4.0/llms.txt): Complete documentation index.