Rainloop Alternatives

Web-based IMAP email client

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

SOGo is groupware server with a focus on scalability and open standards.

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

A fully fledged, free email server solution, an open source project (GPL v2).

Secure email with absolutely no compromises. Get your free encrypted email account today.

freemium €5.0 / Monthly (user - 5 GB)

SquirrelMail is a standards-based webmail package written in PHP.

open-source

Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Zoho Mail is a webmail service built with the needs of a modern business in mind.

freemium $1.0 / Monthly (per user)

Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.

Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.