Roundcube AlternativesOnly apps categorised as WebMail Providers

The best WebMail Provider alternative to Roundcube is Rainloop, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Roundcube and 17 are WebMail Providers so hopefully you can find a suitable replacement. Other interesting WebMail Provider alternatives to Roundcube are Mailpile, SOGo, Horde and OX App Suite.

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Roundcube alternatives are mainly WebMail Providers, but if you're looking for Email Clients or Mail Servers 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.
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Alternatives list

  1. Rainloop icon

    Rainloop

     58 likes

    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.

    13 Rainloop alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Alerts

    • Discontinued

    Platforms

    • Online
    • Self-Hosted
    • Nextcloud
    • JavaScript
    • PHP
    • Cloudron
    Login
     
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    3
    28
    Comments about Rainloop as an Alternative to Roundcube
    mandrael
    Positive
    1

    It's popular, modern programmed, faster than roundcube, but not so feature rich. Much sits below the surface though.

    Guest
    Positive
    3

    PHP based and customizable more than roundcube, more modern ui

    Review by a new / low-activity user.
    EgorSharin
    Negative
    1

    The old version (no longer maintained since 2022) is still open-source on GitHub. The new version is closed-source.

    Roundcube Icon
    Rainloop icon

    • Almost everyone thinks Rainloop is a great Roundcube alternative.

    • Rainloop is the most popular Web-based & Self-Hosted alternative to Roundcube.

    • Rainloop is the most popular Open Source & free alternative to Roundcube.

    • Rainloop is Free and Open SourceRoundcube is also Free and Open Source
  2. Mailpile icon

    Mailpile

     117 likes

    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.

    59 Mailpile alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Alerts

    • Discontinued

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • OpenPGP
    Mailpile screenshot 1
     
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    3
    12
    Comments about Mailpile as an Alternative to Roundcube
    Guest
    Negative
    0

    Mailpie is a descktop application but Roundcube is a selfhosted application.

    Review by a new / low-activity user.
    Guest
    Negative
    1

    Mailpile needs to run on a computer

    Review by a new / low-activity user.
    Guest
    Negative
    -1

    Mailpile is single-user (personal) environment

    Review by a new / low-activity user.
    Roundcube Icon
    Mailpile icon

    • Some users think Mailpile is a great Roundcube alternative, some don't.

    • Mailpile is the most popular Linux alternative to Roundcube.

    • Mailpile is Free and Open SourceRoundcube is also Free and Open Source
  4. SOGo icon

    SOGo

     30 likes

    SOGo is groupware server with a focus on scalability and open standards.

    SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.Share your calendars, address books and mails in.

    61 SOGo alternatives

    Cost / License

    • Freemium (Subscription)
    • Open Source (GPL-2.0)

    Application type

    Platforms

    • Linux
    • Online
    • Thunderbird
    • Cloudron
    SOGo screenshot 1
    SOGo screenshot 2
    SOGo screenshot 3
     
  5. Horde icon

    Horde

     29 likes

    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.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • Self-Hosted
    Horde screenshot 1
     
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    8
  6. OX App Suite icon

    OX App Suite

     15 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 types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    OX Portal
     

    • OX App Suite is the most popular SaaS alternative to Roundcube.

    • OX App Suite is Free and Open SourceRoundcube is also Free and Open Source
  7. Atmail Email Server icon

    Atmail Email Server

     7 likes

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Linux
    • Online
    Intuitive Webmail Interface
     
  9. CrossBox icon

    CrossBox

     1 like

    Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.

    Cost / License

    • Subscription
    • Proprietary

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    View Mailbox (Dark mode)
     

    • CrossBox is the most popular Android, iPhone, iPad & Android Tablet alternative to Roundcube.

    • CrossBox is Paid and ProprietaryRoundcube is Free and Open Source

  10. NeutronMail

     8 likes

    Self-hosted server for the Proton Mail client.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • Self-Hosted
     
  11. Webmail Lite icon

    Webmail Lite

     17 likes

    Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail application, which is fast and easy to use. Whether you need a free web browser based email client software for Windows ASP.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    Afterlogic Webmail Lite
     
  12. Isotope Mail Client icon

    Isotope Mail Client

     1 like

    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...).

    Cost / License

    Application types

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted
    • Kubernetes
    • Docker
    • OpenShift
    Inbox with some read e-mails
     
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    13

    • Almost everyone thinks Isotope Mail Client is a great Roundcube alternative.

    • Isotope Mail Client is the most popular Windows & Mac alternative to Roundcube.

    • Isotope Mail Client is Free and Open SourceRoundcube is also Free and Open Source
  13. Squirrelmail icon

    Squirrelmail

     24 likes

    SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Self-Hosted
    • PHP
    Squirrelmail screenshot 1
     
  14. Postaci icon

    Postaci

     1 like

    Postaci (Turkish for Postman) is multiplatform Webmail software which is database independent, multilanguage, POP3/IMAP, and fully MIME-compatible. While using POP3 mode to fetch messages it uses database fields to simulate IMAP folders, on which you can save, move, delete, and...

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Linux
     
12 of 17 Roundcube alternatives