Roundcube AlternativesOnly apps categorised as Calendar Apps

The best Calendar alternative to Roundcube is Kolab, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Roundcube and six of them are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to Roundcube are Zimbra Collaboration Suite, Horde, OX App Suite and Bulwark.

filter to find the best alternatives

Roundcube alternatives are mainly Calendar Apps, but if you're looking for Email Clients or WebMail Providers you can filter on that. Other popular filters include Self-Hosted and Open Source. These are just examples - use the filter bar below to find more specific alternatives to Roundcube.
More about Roundcube
Copy a direct link to this comment to your clipboard
Alternatives
Get a badge for your siteRoundcube alternatives page was last updated

Alternatives list

  1. Kolab icon

    Kolab

     43 likes

    Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Linux
    • Online
    • Self-Hosted
    Good alternative?
     
  2. Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

     35 likes

    Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.

    51 Zimbra Collaboration Suite alternatives

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • US flagUnited States
    Zimbra Collaboration Suite screenshot 1
    Good alternative?
     
  4. Horde icon

    Horde

     30 likes

    Enterprise-level, browser-based suite for IMAP email, calendar, contacts, tasks, notes, wiki, and file management, offering syncing, shared and unlimited resources, multilingual support, customizable dashboard, and integration with mobile and external clients.

    42 Horde alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    Horde screenshot 1
    Good alternative?
     
  5. OX App Suite icon

    OX App Suite

     17 likes

    The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    • DE flagGermany
    • European Union flagEU
    OX Portal
    Good alternative?
     
  6. Bulwark icon

    Bulwark

     1 like

    JMAP Webmail built for the 21st Century. A modern, self-hosted email client for Stalwart Mail Server powered by the JMAP protocol. Email, calendar, contacts and files. Fast, private, and open source.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Self-Hosted
    • Docker
    • DE flagGermany
    • European Union flagEU
    dark theme
    Good alternative?
     
  8. ihasmail icon

    ihasmail

     Like

    ihasmail is a webmail client for Stalwart Mail Server. It handles mail, calendars, contacts, file storage and Sieve filters in a single responsive interface that works on a phone as well as a desktop monitor.

    Cost / License

    Application type

    Platforms

    • Docker
    • Online
    • Node.JS
    • Self-Hosted
    ihasmail screenshot 1
    Good alternative?
     
6 of 6 Roundcube alternatives