Alternatives to Horde for all platforms with any license

Platforms

Desktop

Mobile

Tablet

Web / Online

Wearable

Browsers

Development

Indie / Classic

Other Platforms

  • Gmail icon

    Gmail

    Gmail is a free search-based web-mail service. It offers a full featured web-based email client with search capabilities, a mailbox...

    Free Personal Web / Cloud Android iPhone Chrome OS Android Tablet iPad ... Android Wear Kindle Fire

  • Roundcube icon

    Roundcube

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

    Open Source Self-Hosted PHP

  • Mailpile icon

    Mailpile

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

    Open Source Mac Windows Linux Web / Cloud Self-Hosted

  • Rainloop icon

    Rainloop

    Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no...

    Open Source Self-Hosted JavaScript PHP

  • 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...

    Open Source Self-Hosted PHP

  • Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

    Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web...

    Freemium Linux Web / Cloud

  • 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...

    Open Source Web / Cloud Self-Hosted

  • 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...

    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...

    Open Source Linux BSD Self-Hosted

  • GyazMail icon

    GyazMail

    GyazMail is a email client software for Mac OS X, based on Cocoa framework, simple, easy-to-use with many features.

    Commercial Mac

  • 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. ...

    Commercial Linux Web / Cloud

  • NOCC

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

    Open Source 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...

    Open Source Web / Cloud

  • 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...

    Free iPhone

  • Simple Mail icon

    Simple Mail

    Simple Mail is a mail client for Firefox. It allows you to get notified, read and write messages for multiple email accounts inside...

    Free Mac Windows Linux Firefox

  • atmail icon

    atmail

    Atmail allows you to choose between on-premises or cloud deployment. Features include email, contact, calendar, task, storage...

    Commercial Mac Windows Linux Android iPhone Android Tablet ... iPad

  • nvlope icon

    nvlope Discontinued

    Simple and minimal email with custom domain and own API.

    Commercial Mac Windows Linux

  • eGroupWare icon

    eGroupWare

    Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and...

    Open Source Linux Web / Cloud

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  • GeekInbox icon

    GeekInbox

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

    Freemium Web / Cloud

  • 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...

    Open Source Mac Windows Linux

  • Mr. Mail icon

    Mr. Mail

    MrMail offers flexible Zimbra Hosting packages suitable for everyone, from single home user to a large company (SME) at superb prices...

    Commercial Web / Cloud

  • phlyMail

    phlyMail is an advanced webmail and groupware solution featuring unlimited profiles, multiple users, a calendar, contacts list and...

    Freemium Web / Cloud

  • Turing Email icon

    Turing Email

    Turing Email is an email client that you can use with your existing email accounts that is packed with innovative features packaged...

    Commercial Mac Windows Web / Cloud Android iPhone Android Tablet ... iPad

  • Pluxmail.com icon

    Pluxmail.com

    Pluxmail is a luxury email solution where you receive an excellent service and can profit a lot by reselling the service

    Commercial Mac Windows Linux Web / Cloud Android iPhone ... iPad

  • Thexyz icon

    Thexyz

    You can protect all your computers with a worry free online backup system. Enjoy the peace of mind that comes with knowing that every...

    Commercial Web / Cloud

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