ISPmanager 6 is a flexible cPanel alternative with native Nginx+PHP-FPM support. Migration: cPanel backup → files + DB → email → SSL.
/usr/local/cpanel/scripts/pkgacct USERNAME /home/backup/
rsync -av /tmp/homedir/public_html/ /var/www/www-root/data/www/example.com/
zcat /tmp/mysql/db1.sql.gz | mysql -u root -p db1_new
Mailbox passwords cannot be migrated (stored as hashes). Notify users to reset passwords before the migration date.