Rainloop has been discontinued. Similar apps include Roundcube, which is free and open source. Other options are Mailpile, SOGo, Horde and Cloud Mail. You can choose from more than 10 WebMail Providers like Rainloop for self-hosting, the web, Linux, Mac and Windows.
Postaci (Turkish for Postman) is multiplatform Webmail software which is database independent, multilanguage, POP3/IMAP, and fully MIME-compatible. While using POP3 mode to fetch messages it uses database fields to simulate IMAP folders, on which you can save, move, delete, and...
Microservice based webmail client built with ReactJS and Spring.
Minimalistic webmail client which currently has the main features of any other mail client (read mail, compose mail, organize mail folders...).
Spain
EU
High security web-based e-mail system which extends considerably the email system to much more than currently exists.
ihasmail is a webmail client for Stalwart Mail Server. It handles mail, calendars, contacts, file storage and Sieve filters in a single responsive interface that works on a phone as well as a desktop monitor.
India
Vietnam
