Yahoo! Zimbra Desktop Feature Comparison

Feature Comparison with Competing Products

	Yahoo! Zimbra Desktop	Outlook	Thunderbird
Cross Platform	Windows, Mac OS, Linux	Windows Only	Windows, Mac OS, Linux and more
Cost	Free	Commercial License	Free
Open Source	100%	No	100%

Support Enterprise Collaboration Server	Zimbra Collaboration Suite	Microsoft Exchange Server	No
Identical UI as Enterprise Collaboration Server Web UI	Yes	No	No
Integrated Calendar	Yes	Yes	Via Lightning extension, not production quality
Corporate Address Book	Yes	Yes	No
Documents, Tasks and Briefcase	Yes	Tasks only	No
Groupware Sharing and Delegation	Yes	Yes	No

Yahoo! Mail Support	Yes	No	Via WebMail extension, not production quality
Yahoo! Address Book Support	Yes	No	No
Yahoo! Calendar Support	Yes	No	No

Gmail Mail Support	Yes	Yes	Yes
Google Address Book Support	Yes	No	No
Google Calendar Support	Yes	No	No

Windows Live Mail Support	Yes	Yes	Via WebMail extension, not production quality
Windows Live Address Book Support	Yes	Yes	No

POP3 Support	Yes	Yes	Yes
IMAP4 Support	Yes	Yes	Yes

Email Address Auto Complete	Yes	Yes	Only previously mailed contacts
Drag and Drop from Desktop	Yes	No	No
Support Tagging All Data Types	Yes	No	No
Conversation View Across Folders	Yes	No	No

Usable When Offline	Yes	Yes	Yes
Seamless Online/Offline Transition	Yes	Yes	No
Access All Data Offline	Yes	Does not download all data by default	Does not download all data by default
Manage Multi-GB Mailboxes	Yes	Slow	Slow
Search across Multi-GB Data	Index based, fast	Limited and slow	Limited and slow
New Mail Notification	Yes	Limited	Limited
Themes and Colors	Yes	No	Yes
Auto Update	Yes	Yes	Yes
Extensibility	Zimlets	Plugins	Extensions

Verified Against: N/A	Date Created: 12/31/2008
Article ID: http://wiki.zimbra.com/index.php?title=Yahoo%21_Zimbra_Desktop_Feature_Comparison	Date Modified: 2/9/2009