imapsync vs Shoviv Email Migration Tools

imapsync is an IMAP transfer tool for migrating or backing up mailbox accounts. Its command-line software makes incremental, recursive transfers, and a stopped transfer can be restarted without generating duplicates. The software runs on Windows, Mac OS X and Linux, with listed compatibility including Gmail, Office 365, Exchange, Dovecot and Zimbra. The online service offers free mailbox syncs below 3 GB; buying provides unlimited syncs of any size. Buyers also receive a visual interface for installation on a Linux server, though that interface does not yet work on Windows. Staged and tenant-to-tenant moves are supported, including for Microsoft 365 and Google Workspace. The software-only plan is €72 as a one-time purchase; professional support is €144, paid once, as is the Imapsync + support plan. There is no trial version, and purchases carry a 30-day money-back guarantee. The tool cannot migrate contacts or calendars, maintain two-way synchronization between active accounts, or transfer messages to or from a local directory.

Shoviv Email Migration Tools is Windows software for moving Exchange mailboxes between on-premises Exchange and Microsoft 365. It supports all versions of on-premises Exchange and Microsoft 365 as sources and targets, including Microsoft 365 tenant-to-tenant migration. Multiple mailboxes can be processed, with no stated restriction on mailbox size or mailbox count. The tool migrates shared, public-folder, and archive mailboxes. Incremental export can resume an interrupted job and carry new or changed items on a later run. Filters can target dates, folders, or item types, and jobs can run daily, weekly, or monthly. Shoviv describes standalone installation in the customer environment, with no third-party tools or cloud services used for migration and no source-data modification. Windows and Windows Server are supported, with Windows 10 or 11 recommended and 32-bit and 64-bit architectures listed. A free trial processes or saves the first 50 items per folder. Paid pricing starts at $39; listed lifetime mailbox plans include $494.90, paid once for 10–150 mailboxes, $8,984.49, paid once for 200, $13,963.49, paid once for 400, and $14,952.99, paid once for 500.