Rainloop Alternatives

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...

Features:

• Hostable
• PGP Encryption
• Php

Mailpile

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and...

Features:

• Encrypted Email
• POP3 Support
• Web-Based

SOGo

SOGo is groupware server with a focus on scalability and open standards. SOGo provides a rich AJAX-based Web interface and supports multiple native clients through...

Features:

• CalDAV
• CardDAV
• Support for Multiple Users
• Scheduling

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...

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...

Features:

• Cross-platform
• Exchange
• On-premises software
• SMTP

Cypht

All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail. Cypht does not replace your existing accounts - it combines them into...

Features:

• JMAP
• Built-in RSS reader
• End-to-End Encryption
• Modules
• POP3 Support
• SMTP

Turing Email

Turing Email is an email client that you can use with your existing email accounts that is packed with innovative features packaged into a beautiful design. Turing is...

Features:

• Email scheduling
• Email tracking
• Salesforce integration

Isotope Mail Client

Microservice based webmail client built with ReactJS and Spring. Minimalistic webmail client which currently has the main features of any other mail client (read...

Features:

• Autocompletion
• Support for Docker
• Dockerized
• Drag n drop
• Email Server
• No database needed
• Rich text editing
• Web-Based

Safe-mail.net

High security web-based e-mail system which extends considerably the email system to much more than currently exists. Safe-mail uses an SSL secure site to ensure...

Features:

• POP3 Support
• SMTP