Roundcube is described as '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, including MIME support, address book, folder manipulation, message searching and spell checking' and is a very popular webmail provider in the office & productivity category. There are more than 25 alternatives to Roundcube for a variety of platforms, including Self-Hosted, Web-based, Linux, Docker and PHP apps. The best Roundcube alternative is Rainloop, which is both free and Open Source. Other great apps like Roundcube are Mailpile, Kolab, SOGo and Zimbra Collaboration Suite.
A fully fledged, free email server solution, an open source project (GPL v2).
Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support.
Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.
Works on both no.
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.
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, or any shell access for the users. It interfaces directly with user mail spools.
TrulyMail is an email client and a private messaging system, very feature rich (voice recording, script blocking, etc.).
United States
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.
Vietnam
India
