Isotope mail client is a free open source webmail application built with a microservice architecture vision in mind. As of now, the application is just an MVP offering the basic functionalities of any standard webmail client (email read, rich-text html email compose, folder management...). The main advantage of Isotope is the ease of deployment. The application doesn't need a back-end database to run and can be easily deployed using the provided Docker images.
Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts ...
SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP ...
Self-hosted server for the ProtonMail client.
Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgr ...
Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functi ...
Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who ne ...
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is ...