Rainloop is described as 'Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required' and is a popular app in the Office & Productivity category. There are more than 10 alternatives to Rainloop for a variety of platforms, including the Web, Self-Hosted solutions, Linux, PHP and Cloudron. The best alternative is Roundcube, which is both free and Open Source. Other great apps like Rainloop are Mailpile (Free, Open Source), SOGo (Freemium, Open Source), Horde (Free, Open Source) and Isotope Mail Client (Free, Open Source).
- 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...). View 11 alternatives to Isotope Mail Client
- Free • Open Source