Veritas offers Backup Exec and Netbackup.
Both have replication options that allow for data to be replicated to an off site location.
Backup Exec handles Windows environments while Netbackup handles Win/Lnx/Unix/Aix etc.
Netbackup has the added advantage of having integrated appliances that can provide backup, storage and replication – this is an all in one offering.
Please see links to info:
https://www.veritas.com/product/backup-and-recovery/netbackup
https://www.veritas.com/product/backup-and-recovery/netbackup-appliances
https://www.veritas.com/product/backup-and-recovery/backup-exec
The sizing depends on the complexity of the environment and the capacity of data to be backed up and replicated.
Regards,