In this table we compare the different versions of Zimbra software. We based this comparison on Zimbra Collaboration Suite 8.5

Web application	Professional	Standard	Open Source
Email	v	v	v
- Grouping messages by conversation	v	v	v
- Labelling messages	v	v	v
- Advanced search	v	v	v
- Search attachments	v	v	-
- Use of Zimlets	v	v	v
Contacts	v	v	v
- Distribution lists	v	v	v
- General address list	v	v	v
- Connector for MS Exchange	v	v	-
Agenda	v	v	v
- Locations and equipment	v	v	v
- Connecting to MS Exchange	v	v	v
Files	v	v	v
Briefcase	v	v	v
Tasks	v	v	v
S/Mime certificates	v	v	-
Change policy for storage	v	v	-

Desktop programmes	Professional	Standard	Open Source
POP and IMAP email	v	v	v
CardDAV, iCal and CalDAV	v	v	v
Outlook for Mac	€	€	-
Synchronising Outlook	v	-	-

Mobile devices	Professional	Standard	Open Source
Mobile web interface	v	v	v
Offline mobile web interface	v	v	v
Zimbra touch interface	v	v	-
Zimbra activesync (iOS, Android, Windows)	v	-	-
POP and IMAP email	v	v	v
CardDAV, iCal and CalDAV	v	v	v
Zimbra plug-in for Blackberry	v	v	-
Mobile devices security policy	v	-	-

Server maintenance	Professional	Standard	Open Source
Maintenance through web	v	v	v
Maintenance through command prompt	v	v	v
Integrated SPAM and anti-virus	v	v	v
LDAP and MS Active directory support	v	v	v
Create and restore back-up any time	v	v	-
Hierarchical storage (SSD -> HDD)	v	v	-
Legal compliance archiving	v	-	-

Domain support and adaptability	Professional	Standard	Open Source
Multiple domain support	v	v	v
Tools for migration	v	v	v
Delegate domain maintenance	v	v	-
Branding	v	v	-

Support	Professional	Standard	Open Source
Zimbra communication and forums	v	v	v
Zimbra support by email and telephone	v	v	-
Zimbra 24x7 suppport	€	€	€

If anything is unclear or you would like a custom quote, please don't hesitate to contact us. Call +31-345-200 010 or email