When comparing SOGo vs Zimbra Web Client, the Slant community recommends SOGo for most people. In the question“What are the best self-hosted webmail clients?” SOGo is ranked 5th while Zimbra Web Client is ranked 11th.
Ranked in these QuestionsQuestion Ranking
Pro Calendaring and messaging data can be accessed via web and multiple desktop and mobile clients
Available in 30 languages.
Pro Microsoft ActiveSync support
Pro Fully responsive
The UI is fully responsive, and works fine on desktop, tablets and phones.
Pro Drag and drop interface
Folders, contacts and events can be moved around with intuitive drag and drop functionality.
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.
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