Alternatives to Horde for all platforms with any license

Platforms

Show 17 less popular platforms
  • Mailpile icon

    Mailpile

    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...

    Open Source Mac Windows Linux Web / Cloud Self-Hosted

  • Roundcube icon

    Roundcube

    Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client...

    Open Source Self-Hosted PHP Cloudron

    No features added Add a feature
  • Zoho Mail icon

    Zoho Mail

    Zoho Mail is a webmail service built with the needs of a modern business in mind. It provides features for business users to communicate effectively while catering to...

    Freemium Web / Cloud Android iPhone

    No features added Add a feature
  • 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...

    Open Source Self-Hosted JavaScript PHP Cloudron

    No features added Add a feature
  • 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...

    Open Source Self-Hosted PHP

    No features added Add a feature
  • 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...

    Open Source Web / Cloud Self-Hosted

    No features added Add a feature
  • 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...

    Open Source Linux BSD Self-Hosted

    No features added Add a feature
  • mailcow icon

    mailcow

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

    Open Source Linux

    No features added Add a feature
  • Atmail Email Server icon

    Atmail Email Server

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook ...

    Commercial Linux Web / Cloud

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  • 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....

    Open Source Web / Cloud

    No features added Add a feature
  • 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.

    Open Source Mac Windows Linux

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