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imapsync review

Freemium#11 of 25 in Email Migration Software

A cost-conscious choice for staged, scriptable mailbox migrations across IMAP systems.

7.8/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

imapsync is a command-line utility for one-way transfers between compatible IMAP mailboxes. It is designed for administrators, consultants, and organizations moving or backing up email accounts, including tenant-to-tenant and staged migration projects. The software recursively copies folders and subfolders, preserves message flags and unread state, detects duplicates, and supports repeated synchronization runs. An online visual interface provides an alternative to local installation.

Pricing is structured around a free online option and one-time software purchases. The Free online plan requires no installation, is available 24/7, and covers migrations below 3 GB. Software only costs €72 one time and supports Windows, Linux, and macOS, with lifetime updates and no license limits. Software + support costs €144 one time and adds professional support, online service access, platform binaries, Perl source code, and a Linux self-hosted visual interface. Professional support is also priced at €144 one time and covers migration support from the author. The official site notes a 30-day money-back guarantee and says VAT treatment varies by buyer location.

Its strongest fit is a mailbox-focused migration where administrators need control over timing and repeatable execution. Bulk migration can use scripts and mailbox lists, while planned pre-synchronization and post-synchronization runs support staged cutovers. Gmail label synchronization, Office 365 support with OAuth2 authentication, and compatibility with Gmail, Google Workspace via Gmail IMAP, Exchange, iCloud, Yahoo, AOL, Domino, Zimbra, Dovecot, Amazon WorkMail, and MailEnable broaden its practical reach. Choose imapsync when mailbox transfer is the central requirement and a one-time purchase or free small migration is preferable. Choose another category tool when the project depends on calendar or contacts migration, or when a fully guided interface is required for the entire workflow.

imapsync pros and cons

  • Where it wins
    • Incremental transfers preserve folders, flags, unread state, and avoid duplicates
    • Runs on Windows, Linux, macOS, web, and self-hosted environments
    • Supports bulk migrations, staged runs, OAuth2, and many IMAP platforms
  • Where it doesn't
    • Focused on mailbox synchronization rather than calendar or contacts migration
    • The free online option is limited to migrations below 3 GB
    • The core workflow is command-line oriented

imapsync fact sheet, pricing and score →

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