This page is for WordPress Backup Plugins, for WordPress Backups outside of WordPress that don’t require a plugin please see WordPress Backups
Free
Migrate Guru
Free/Paid
The plugin has a free version but also a paid with more features.
All-in-One WP Migration and Backup
https://wordpress.org/plugins/all-in-one-wp-migration/
WPvivid
https://wordpress.org/plugins/wpvivid-backuprestore/
UpdraftPlus
https://wordpress.org/plugins/updraftplus/
Duplicator
Boldgrid Backup
https://wordpress.org/plugins/boldgrid-backup/
Jet Backup
https://wordpress.org/plugins/backup/
Backuply
https://wordpress.org/plugins/backuply/
Paid
Jetpack VaultPress Backup
https://wordpress.org/plugins/jetpack-backup/