imapsync vs SysTools Email Migration Tool

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.

SysTools Email Migration Tool moves mailbox content between email platforms while retaining folder structure and message details. It can transfer emails, contacts, calendars, documents, and attachments; Office 365, Exchange, and G Suite are listed as example platforms. Users can filter by date range and choose which mailbox categories to transfer. The tool preserves email properties including read status, reply or forward flags, and sent or received timestamps. Bulk migration uses user fetching and CSV templates, with up to 20 transfers running in parallel. Retry and rerun options are available, along with downloadable summary and detailed CSV reports. The product page says transfers do not store data on intermediary servers, and supported Google and Microsoft platforms can use OAuth 2.0. A local database temporarily buffers data so a dropped internet connection can be restored without restarting the operation. The free demo fully migrates mailboxes for two user accounts. The Paid Version is listed at $35, paid once for five users; the page also notes pricing from $7/user.