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    Open Source Roundcube Alternatives

    The best open source alternative to Roundcube is Rainloop. If that doesn't suit you, our users have ranked more than 25 alternatives to Roundcube and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Roundcube are Mailpile (Free, Open Source), Zimbra Collaboration Suite (Freemium, Open Source), Isotope Mail Client (Free, Open Source) and Horde (Free, Open Source).

    This page was last updated Jun 17, 2021
    Roundcube
      156
    • FreeOpen Source
    • Self-Hosted
    • PHP
    • Cloudron
    More
    Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full...
    Learn more about Roundcube

      • FreeOpen Source
      • Online
      • Self-Hosted
      • Nextcloud
      • JavaScript
      • PHP
      • Cloudron
      More
      Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required. All these make RainLoop Webmail a perfect choice for your email solution.
      Rainloop vs Roundcube opinions
      Almost everyone thinks Rainloop is a great alternative to Roundcube.
      PHP based and customizable more than roundcube, more modern ui
      Positive comment over 4 years ago

      3
      mandrael It's popular, modern programmed, faster than roundcube, but not so feature rich. Much sits below the surface though.
      Positive comment about 2 years ago

      0
    1. Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and all code related to the project is and will be released under an OSI approved Free Software license.

      Discontinued

      1.0.0 Release Candidate 6 from 2019 is the last version on GitHub (https://github.com/mailpile/Mailpile/releases). Possibly the development has been stopped.

      Mailpile vs Roundcube opinions
      Some users think Mailpile is a great alternative to Roundcube, some don't.
      Mailpile is single-user (personal) environment
      Negative comment almost 4 years ago

      -1
      Mailpile needs to run on a computer
      Negative comment over 4 years ago

      2


    2. 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.
    3. Microservice based webmail client built with ReactJS and Spring. Minimalistic webmail client which currently has the main features of any other mail client (read mail, compose mail, organize mail folders...).
      Almost everyone thinks Isotope Mail Client is a great alternative to Roundcube.
      • FreeOpen Source
      • Online
      • Self-Hosted
      More
      Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project.
      Most users think Horde is a great alternative to Roundcube.


      • FreemiumOpen Source
      • Linux
      • Online
      • Thunderbird
      • Cloudron
      More
      SOGo is groupware server with a focus on scalability and open standards.
    4. Easy-to-deploy mail server.
    5. Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.
      No screenshots yet
    6. hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.
      hMail Server vs Roundcube opinions
      pros, cons and recent comments
      hmailserver is a "mail server" not webmail client
      Negative comment 11 months ago

      0
      • FreemiumOpen Source
      • Linux
      • BSD
      • Self-Hosted
      More
      More
      A fully fledged, free email server solution, an open source project (GPL v2).
    Showing 10 of 20 alternatives