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Outlook Google Calendar Sync vs Google Workspace Sync for Microsoft Outlook: catalog facts
Outlook Google Calendar Sync	Google Workspace Sync for Microsoft Outlook
Free Free and open source under MPL-2.0, supported by donations.	Free Free download, but it requires a Google Workspace account.
Windows	Windows
Syncs attendees, reminders and descriptions Portable version needs no installation	Lets Google Workspace users keep using Outlook MSI packages for administrator deployment
Windows only and needs desktop Outlook Requires a Google account	Windows only Requires a Google Workspace account
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.