Rainloop Alternatives

Web-based IMAP email client

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

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

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

open-source

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

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

Gmail is a free search-based web-mail service.

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

freemium €5.0 / Monthly (user - 5 GB)

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

All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail.

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.

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