Zoho
Free Personal
ZOHO Corporation offers online business, network, and IT infrastructure management applications, and software maintenance and support services.
Kolab Community
Open Source
Kolab is a free and open source groupware suite.
Microsoft Exchange Server
Commercial
Microsoft Exchange Server is a mail server and calendaring server.
Kolab Now
Commercial
Kolab Now is a web-based email and groupware service, based completely on free and open-source software.
Zimbra Collaboration Suite
Freemium
Zimbra offers an open source email platform for the enterprise.
Compare Kopano with alternatives
Compare Kolab Community and Kopano and decide which is most suitable for you.
Compare Zimbra Collaboration Suite and Kopano and decide which is most suitable for you.
Compare Microsoft Exchange Server and Kopano and decide which is most suitable for you.