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 19 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Roundcube are Mailpile, Kolab, SOGo and Horde.

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Alternatives list

  1. N

    NeutronMail

     8 likes

    Self-hosted server for the Proton Mail client.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • Self-Hosted
     
  2. 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
     
  4. 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
     
  5. C

    CacoCloud

     10 likes

    A simple, fast and secure PHP/AngularJS based single user feed and mail reader, password and bookmark manager. CacoCloud is divided into a RESTful PHP backend storing all data into a SQLite database and an SPA frontend based on AngularJs.

    Cost / License

    • Free
    • Open Source

    Application types

    Alerts

    • Discontinued

    Platforms

    • Self-Hosted
    • AngularJS
    Feed reader
     
  6. NOCC icon

    NOCC

     5 likes

    NOCC is a webmail client written in PHP. It provides webmail access to IMAP and POP3 accounts.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    NOCC inbox view
     
  7. iRedMail icon

    iRedMail

     20 likes

    A fully fledged, free email server solution, an open source project (GPL v2).

    Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support.

    Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.

    Works on both no.

    66 iRedMail alternatives

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Linux
    • BSD
    • Self-Hosted
    Main components and working process
     
  9. NeoMail icon

    NeoMail

     3 likes

    NeoMail is a web-based mail client that allows users to access their mail spools and send messages. It does not require a POP3 server, or any shell access for the users. It interfaces directly with user mail spools.

    Cost / License

    • Free
    • Open Source

    Application types

    Alerts

    • Discontinued

    Platforms

    • Online
    NeoMail screenshot 1
     
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