CodeTwo Exchange Migration vs Inbox Hop

CodeTwo Exchange Migration is a server application for moving mailboxes and public folders into on-premises Exchange Server Subscription Edition. Sources include earlier Exchange versions, Microsoft 365, hosted Exchange and IMAP systems. Exchange Server 2013 and newer can move directly to Subscription Edition. The software supports cross-forest and cross-domain moves, staged and hybrid migrations, and delta passes that copy new items without duplicating migrated ones. IMAP sources include Google Workspace, HCL Notes, Rackspace, Zimbra, Kopano and Kerio Connect. Administrators can schedule jobs, filter by time or folder, choose item types and monitor detailed reports. Installation runs in the customer environment without third-party migration tools or cloud services. Connections are encrypted, and Microsoft 365 uses OAuth 2.0 without storing credentials. Calendar and contact migration are supported; tenant-to-tenant moves are not. A 30-day trial is available, while paid licenses include support and updates.

Inbox Hop migrates email, calendars, and contacts among Microsoft 365, Google Workspace, and on-premises Exchange. Projects can move data cloud-to-cloud, from cloud to on-premises, or in the reverse direction. Microsoft 365 connections use Exchange Web Services with guided Azure app registration and permission checks. Google Workspace uses Google APIs and service-account domain-wide delegation, avoiding per-mailbox credentials. After scanning, the platform suggests mailbox matches; users can change assignments or create missing destination mailboxes automatically. Run modes include scanning, folder-structure-only copies, full migrations, and incremental delta runs. A full migration consumes one prepaid credit per mailbox regardless of data volume, while scans and delta runs use no credits. On-premises Exchange can connect directly over HTTPS or through a Windows connector that polls outbound HTTPS without inbound firewall rules. Monitoring shows transfer rate, items per minute, health, and chronological logs. Inbox Hop describes encrypted connection secrets, tenant isolation, role separation, permission validation, and append-only audit records. It is intended for organizations changing mail platforms.