The Best 10 Rainloop 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

  • Horde 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 compliant components from the Horde Project.

    Free Open Source Web Self-Hosted

  • 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

  • NeutronMail icon

    NeutronMail

    self-hosted server for the protonmail client.

    Free Open Source Web Self-Hosted

  • PrivMX WebMail icon

    PrivMX WebMail

    Alternative, self-hosted private mail system. End-to-end encryption for messages and attachments. Easy to install and administration. Allows also to create end-to-end...

    Free Self-Hosted PHP

  • Postaci icon

    Postaci

    Postaci (Turkish for Postman) is multiplatform Webmail software which is database independent, multilanguage, POP3/IMAP, and fully MIME-compatible. While using POP3 mode...

    Free Open Source Linux