The Best 37 Horde Alternatives

  • Mailpile icon

    Mailpile

    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

    Free Open Source Mac OS X Windows Linux Web Self-Hosted OpenPGP

  • Rainloop icon

    Rainloop

    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.

    Free Open Source Self-Hosted Cloudron PHP JavaScript

  • Squirrelmail icon

    Squirrelmail

    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.

    Free Open Source Self-Hosted PHP

  • mailcow: dockerized icon

    mailcow: dockerized

    mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.

    Free Open Source Linux

  • iRedMail icon

    iRedMail

    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.

    Free Open Source Linux BSD Self-Hosted

  • Webmail Lite icon

    Webmail Lite

    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.

    Free Open Source Web Self-Hosted

  • eGroupWare icon

    eGroupWare

    Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and task management, project and file management, trouble ticket system, synchronization.

    Free Open Source Linux Web

  • GeekInbox icon

    GeekInbox

    Geekinbox is an email as a service platform that includes an ajax powered webmail interface. Free Plans Available

    Freemium Web

  • nvlope icon

    nvlope

    Simple and minimal email with custom domain and own API.

    Commercial Mac OS X Windows Linux

  • NOCC icon

    NOCC

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

    Free Open Source Web

  • Agenda Mahala icon

    Agenda Mahala

    Agenda Mahala is a great website to Learn English. On Agenda Mahala we have great English Courses, and both Level 1 and Level 2 are completely free. You also get an online notebook to keep the lesson appointments.

    Free Web

  • InboxCube icon

    InboxCube

    For us Email is our lives. At the heart of our inbox lives a personal network of information and content that privately defines who we are.

    Free iPhone

  • OBM icon

    OBM

    OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.

    Free Open Source Mac OS X Windows Linux

    Real time collaboration CalDAV
  • NeoMail icon

    NeoMail

    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.

    Free Open Source Web