Alternatives to Postaci for all platforms with any license

  • 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...

    Free Open Source Self-Hosted PHP Cloudron

    Hostable PGP Encryption Add a feature

    Roundcube 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...

    Free Open Source Mac Windows Linux Web Self-Hosted ... OpenPGP

    POP3 Support Add a feature

    Mailpile icon

  • Rainloop

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

    Free Open Source Self-Hosted JavaScript PHP Cloudron

    Encrypted email Add a feature

    Rainloop icon

  • Horde

    Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards...

    Free Open Source Web Self-Hosted

    CalDAV Add a feature

    Horde 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...

    Free Open Source Self-Hosted PHP

    On-premises software Add a feature

    Squirrelmail 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...

    Free Open Source Web Self-Hosted

    No features added Add a feature

    Webmail Lite icon

  • CacoCloud

    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...

    Free Open Source Self-Hosted AngularJS

    No features added Add a feature

    • Discontinued The project is no longer developed. Last version, 0.1.1, released in February 2015, can be still downloaded from the official website.

  • NaSMail

    NaSMail 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 HTML 4.01...

    Free Open Source Web

    No features added Add a feature

    NaSMail icon

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  • TrulyMail

    TrulyMail is an email client and a private messaging system, very feature rich (voice recording, script blocking, etc.). Features: Spell checking in nine...

    Free Windows

    Portable Add a feature

    TrulyMail icon

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