EdbMails IMAP Migration Tool vs imap-migrate

EdbMails IMAP Migration Tool moves email and folders between IMAP servers, and supports transfers from IMAP to Office 365, Exchange Server or PST, as well as PST to IMAP. The Windows software lists providers including Gmail, GoDaddy, Rackspace, Zoho, Zimbra, IceWarp, cPanel, Yahoo Mail and Outlook.com. Users can choose folders and subfolders and filter mail by date, sender, attachments and AND/OR conditions. The maker says it preserves metadata, headers, folder structure, formatting and language encoding. Multiple mailboxes can be loaded from CSV, and separate installations can run migrations in parallel. Outlook is not required for IMAP-to-IMAP migration or Exchange-to-Office 365 moves. The maker says data and credentials are not stored on its servers and lists OAuth 2.0, TLS, AES 256-bit encryption for locally stored incremental-migration metadata and MFA support. A free trial is available, limited to 30 items from each folder. One-time plans cost 200.00 USD for 100 mailboxes, 299.00 USD for 1000 mailboxes, or 499.00 USD for unlimited mailboxes.

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.