CloudAlly is described as ', a leading provider of cloud to cloud backup and recovery services, provides automated daily backups of Google Apps, Salesforce, AWS SimpleDB and more to Amazon S3 secure storage' and is an website in the Backup & Sync category. There are more than 10 alternatives to CloudAlly, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and iPhone. The best alternative is MailStore. It's not free, so if you're looking for a free alternative, you could try Tumblr Backup or Gmail Backup. Other great sites and apps similar to CloudAlly are Backupify (Paid), Spanning (Paid), UpSafe Office365 backup (Free) and SpinBackup (Free Personal).
Backupify is the only online data backup and storage provider that enables users to backup their cloud accounts seamlessly to the Amazon S3 cloud, which has a great security and data duplication policy.
SpinBackup is a cloud backup service, available for Google Apps which protects your data from the most common causes of data loss. It provides daily automatic backups for Gmail, Drive, Picasa and Calendar.
Export your Office 365 mailboxes and Public folders. Archive mails offline. Don’t spend your dollars to retain unwanted mail content in cloud. Move your data to any external storage or have any third-party archival systems consume the exported data.