Compare Roundcube vs. Vivaldi Mail vs. Zimbra

A web-based multilingual IMAP client featuring a user interface that mimics that of a traditional application. This client encompasses all essential email functionalities, such as MIME support, an address book, folder management, message searching, and spell checking. It also allows for efficient message handling through drag-and-drop features. Users benefit from a comprehensive address book that includes group options and LDAP connectors, as well as pre-defined response templates. Its responsive design ensures compatibility across multiple devices. Roundcube is utilized by thousands of services that offer webmail solutions to millions of users, and we take pride in seeing our application widely adopted. We firmly believe that having Open Source software for vital communication tasks is crucial for society as a whole. Below is a compilation of services that not only implement but also contribute to the development of Roundcube, highlighting how their usage supports the continuous enhancement of our webmail software, making it available at no cost to everyone. These collaborative efforts are fundamental to our mission of keeping the software updated and accessible to all.

Vivaldi Mail is an integrated email client that resides directly within your web browser, allowing for seamless management of emails from various accounts, mailing lists, and feeds all in one consolidated inbox. It maintains a comprehensive database of your messages, labels, filters, and searches, forming the foundation of its robust email functionalities. All emails from your different accounts are indexed for offline searchability, making it a practical solution for users. Having an email client embedded in your browser is a logical choice that enhances productivity. Users can easily compose messages in new tabs, manage multiple emails simultaneously, and take advantage of Vivaldi’s extensive tab functionalities. Within Vivaldi Mail, two counters are displayed next to your folders: 'Unseen' indicates new emails that you have yet to view, while 'Unread' signifies emails you have opened but not yet addressed. To enhance efficiency, you can utilize customizable Keyboard Shortcuts for quicker navigation through your emails. Additionally, the Back and Forward buttons allow you to easily navigate through your email history and views as you work, streamlining your experience even further. This integrated approach not only simplifies email management but also ensures that you stay organized and productive in your communication tasks.

Zimbra 9: Collaboration Superheroes! Users can seamlessly switch between desktop, tablet, and mobile browsers while enjoying consistent email and collaboration experiences. It is extensible and offers best-in-class integrations with Slack and Dropbox. There are many more in development. Zimlet framework allows you to customize Zimbra according to your needs. Zimbra's reliable server infrastructure ensures that customers have the security, privacy, and data sovereignty they expect. Upgrade to Zimbra 9 is easy and requires no data migration. Zimbra 9's responsive, modern UI is built on Zimbra’s reliable server infrastructure. This ensures the security, privacy, and data sovereignty that you have come to expect from Zimbra. Zimbra 9 is flexible, extensible and unlike competitors that use closed platforms. Get out of Microsoft and Google and integrate with third-party collaboration services such as Dropbox, Zoom, and Slack.