# Synapse charm > Documentation for the Synapse charm, a Juju charm that deploys and manages Synapse, a Matrix homeserver, on Kubernetes. It covers deployment, SMTP integration, backup and restore, scaling and charm architecture. 2026 ## Pages in this subsection - [Reference](https://canonical.com/juju/docs/synapse-charm/latest/reference/index.html.md): Technical reference documentation for the Synapse charm, including actions, configurations, and integrations. - [Actions](https://canonical.com/juju/docs/synapse-charm/latest/reference/actions/index.html.md): See Actions. - [Configurations](https://canonical.com/juju/docs/synapse-charm/latest/reference/configurations/index.html.md): See Configurations. - [External access](https://canonical.com/juju/docs/synapse-charm/latest/reference/external-access/index.html.md): Synapse charm requires external access depending on configuration options or Federation required. - [Integrations](https://canonical.com/juju/docs/synapse-charm/latest/reference/integrations/index.html.md): *Interface*: `s3` - [Charm architecture](https://canonical.com/juju/docs/synapse-charm/latest/reference/charm-architecture/index.html.md): Synapse is a drop in replacement for other chat servers like Mattermost and ## Optional - [Top-level llms.txt](https://canonical.com/juju/docs/synapse-charm/latest/llms.txt): Complete documentation index.