When comparing Roundcube vs Zimbra Web Client, the Slant community recommends Roundcube for most people. In the question“What are the best self-hosted webmail clients?” Roundcube is ranked 2nd while Zimbra Web Client is ranked 12th. The most important reason people chose Roundcube is:
Licensed under GPL v3 with code available on [GitHub](https://github.com/roundcube/roundcubemail).
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
Licensed under GPL v3 with code available on GitHub.
Pro Plug-in support
Pro Sophisticated address book
Each contact can have their e-mail address, phone number, location, photos and associated URLs added to them. You can then group contacts and address your mails to the group instead of having to enter each person separately. Additionally, you can import vCards and CSV files as contact information. And, it has LDAP connectors.
Pro Drag & drop support
Roundcube supports attaching files simply by dragging and dropping them in.
Roundcube is available in over 70 languages.
Pro Access control support
Roundcube has built-in support for access control lists (ACL).
Pro Built-in caching
Roundcube caches messages to allow quicker access to your mailbox and to alleviate the strain put on the server. You can turn off caching (change 'enable_caching' property in your config/main.inc.php file) if you need messages to appear instantly.
Pro Multiple identities
You receive mail from multiple sources in one account.
Has auto-refresh functionality for email boxes.
Pro Good documentation
You have access to the documentation for APIs as well plugins development.
Pro Spell checking
You can enable/disable spellcheck by changing "enable_spellcheck" in main.inc.php file.
Pro Full-featured collaboration solution
If you are looking for an alternative to Gmail, look no further than Zimbra. While not a complete document solution it does have some document features as well.
Not easy to create your own themes.
Con Moblie Use
Does not translate to mobile use very well
Con For search there is no reverse index
This means it is very slow.
Unfortunately, all interfaces of roundcube look very old. I hope there will be a progress soon, Google Mail and Outlook Webmail should be the role models here. But also Yahoo mail offers an intuitive design.
If this open source software should survive, it must be completely renewed and bring up to new standards.
Con Extremely clunky unintuitive interface
For example the mouse cursor may start getting stuck and lag.
Con Search option are limited
You can only search for one item at a time instead of multiple search terms, which makes it difficult to go through large amounts of emails.
Con You can't make multiple accounts
It is not possible to make more then one account.
Con Heavy and monolithic
Zimbra doesn't much work with its host platform as much as it brings its own copies of utilities. If you want something small and "plays well with others" integratable...this is not it. Too heavy to run on a RaspberryPi if you're looking for something for just a few users.
Con Linux only
There is no installator for Windows