Google Workspace
7.9#2 in email migration softwareFrom $7 a monthAndroidiOSWebAPI
VisitWorkspace suits individuals and organizations seeking email, collaboration, storage, and productivity apps in one suite. Its business plans offer Gemini features, and larger organizations can consider Enterprise, which has no stated user minimum or maximum.
This service suits organizations moving users between Microsoft 365 tenants. It is relevant when the project includes mailboxes, OneDrive, calendars, contacts, or a phased migration plan.