Isotope Mail Client Alternatives
Isotope Mail Client is described as *'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...)'* and is a webmail provider in the office & productivity category. There are more than 10 alternatives to Isotope Mail Client for a variety of platforms, including Online / Web-based, Self-Hosted solutions, PHP, Cloudron and Linux. The best alternative is Roundcube, which is both free and Open Source. Other great apps like Isotope Mail Client are Rainloop, Mailpile, SOGo and Horde.
Isotope Mail Client alternatives are mainly WebMail Providers but may also be Email Clients or Mail Servers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Isotope Mail Client.- Free • Open Source
- Mac
- Windows
- Linux
- Online
- Self-Hosted
- Kubernetes
- Docker
- OpenShift
- Free • Open Source
- Self-Hosted
- PHP
- Cloudron
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, including MIME support, address book, folder manipulation, message searching and spell checking.
- Free • Open Source
- Online
- Self-Hosted
- Nextcloud
- JavaScript
- PHP
- Cloudron
Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required. All these make RainLoop Webmail a perfect choice for your email solution.
- Free • Open Source
- Linux
- Online
- Self-Hosted
- OpenPGP
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 all code related to the project is and will be released under an OSI approved Free Software license.
Discontinued
1.0.0 Release Candidate 6 from 2019 is the last version on GitHub (https://github.com/mailpile/Mailpile/releases). Possibly the development has been stopped.
- Freemium • Open Source
- Linux
- Online
- Thunderbird
- Cloudron
SOGo is groupware server with a focus on scalability and open standards.
Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project.
Discontinued
The last release (5.2.22) was in September 2017.
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 HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers.
Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail application, which is fast and easy to use. Whether you need a free web browser based email client software for Windows ASP.
- Free • Open Source
- Self-Hosted
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 one. And it's also a news reader :).
High security web-based e-mail system which extends considerably the email system to much more than currently exists.
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