MailStore - MailStore Home - A 100% free single-private-user desktop solution
Gmvault - Backup the emails in your Gmail account.
SysTools Gmail Backup - Backup Gmail Emails, Contacts, Calendar, and Google Drive Storage File by SysTools Gmail Backup Solution
SpinBackup - Spinbackup is the most comprehensive SaaS Data Backup & Security solutions provider for G Suite. Try our 15-Day Free Trial Today!
Mail Backup X - Your one stop mail backup and archiving tool for Mac.
Datto Backupify - Protect your business with backup.