- Joplin has a lot of customization
- Can store your notes wherever you want (Dropbox, WebDAV, OneDrive, Nextcloud, Joplin’s own cloud service, etc)
- Backups can optionally be encrypted (you set a password used to decrypt them and store that somewhere)
- You can make multiple notebooks in the hierarchy structure you want
- Open source
- Markdown (if you’re into that)
- Plugin support
- Tags