Why people self-host Joplin Server
Joplin Server gives Joplin users a self-hosted sync target for notes, notebooks, attachments, and multiple devices. It is a focused way to own note sync while keeping the established Joplin clients.
The tradeoff is narrow scope compared with a web-first workspace. Back up the database and attachments together and test client conflict behavior.
Deployment notes
Joplin Server is listed with support signals for linux, docker. Check the upstream documentation before exposing it to the internet, review authentication defaults, and keep backups outside the primary host.