imap-migrate vs MigrationWiz

imap-migrate is a free, open-source command-line tool for transferring the contents of one email folder between IMAP hosts. It can work with providers that support IMAP, including Gmail, Outlook, Fastmail, Yahoo and custom servers. The tool preserves original received dates and flags such as Seen and Flagged, and shows progress, transfer speed, success and error counts, plus estimated time remaining. It records actions in migration.log. Its README says interrupted migrations can be rerun without duplicating emails; the --dry-run option checks connection and settings without moving messages. Credentials can be supplied as command-line arguments or environment variables, with environment variables recommended by the README as the more secure option. Both accounts need IMAP access enabled, and the tool requires Python 3.12 or higher; uv is recommended for dependency management. It runs on Linux, macOS and Windows and is licensed under MIT. It does not rebuild a full folder structure or migrate provider-specific features such as Gmail labels or categories. Bug reports and contributions are invited through GitHub issues and pull requests.

MigrationWiz is a browser-based SaaS service for moving mailboxes, documents, archives, collaboration workloads, identities, and other data between supported environments. Listed workloads include mailboxes, public folders, personal archives, Microsoft Teams, Active Directory, OneDrive, and Google Drive content. Endpoints include Microsoft 365, Google Workspace, Dropbox, and legacy email systems. No hardware or local software installation is required. Projects can be shared, with action logging for team visibility. The service lists autoscaling infrastructure, unlimited concurrent migrations, customizable email notices, automatic Outlook configuration, and a PowerShell SDK expansion. Its SOAP API configures projects and users, submits migrations, and monitors progress, but accounts must be API-enabled. MigrationWiz is described for small jobs through complex enterprise and SMB projects. A free trial is available, but no free plan. Mailbox licensing is $14, paid once per user for up to 50 GB; the User Migration Bundle is $17.50, paid once per user with unlimited data.