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webmail made easy

Lightweight, feature rich email client.
Built with JavaScript for the web.

Powered by JavaScript

Along with modern tooling powerhouses like NPM, ddev and Docker, conjoon provides a well known ecosystem for users and developers alike.

Minimal Footprint

The client is pure JavaScript and requires only a modern web browser on Desktops. REST endpoints can be connected by simply configuring a base url.

Open Source

conjoon is Open Source, providing a solid, tested and extendable foundation for individual messaging and groupware solutions.

Built with

Sencha Ext JS

Sencha Ext JS is a JavaScript framework for building data-intensive, cross-platform web and mobile applications.


coon.js is a toolset for rapid Sencha Ext JS application building, providing the fundament for conjoon's frontend architecture.


l8.js is a small and lightweight JavaScript library and provides wrappers and thin abstraction layers to ease the process of accessing and manipulating data in JavaScript.


Siesta is a JavaScript unit and UI testing tool which can run tests in web pages or in Node.js processes. Siesta has a powerful event recorder & player and a scalable automation package with cloud testing support.


All packages used in and with conjoon are available via NPM, making dependency management and builds easy.


"rest-api-email" is the reference backend for conjoon and written in PHP & built with Lumen

Works with

conjoon comes pre-configured for accessing your email accounts at Google Mail, Microsoft Outlook, AOL, Yahoo, Freenet, GMX, and * without additional setup required.

* conjoon is not affiliated with any of these services. All logos and trademarks are the property of their respective owners.
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