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 137 Like
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 36 Like
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 24 Like
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 23 Like
