Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.

Online Vault Backup - Online Vault Backup is a cloud storage service that allows you backup your data while having unlimited storage.

Gmvault - Backup the emails in your Gmail account.

Rebel Backup - Rebel Backup lets you make encrypted backups of your important files to Dropbox or Google Drive.

imapsync - Console-based utility for migrating IMAP mailboxes.

iMazing Mini - Back up your devices automatically, wirelessly & privately