Welcome to the community space of Kopano

100% Open source collaboration tools: email, calendaring, Mattermost chat, webRTC video meetings, document collaboration with LibreOffice Online, integration with file storage services and more.

Get started

Become a contributor

Every line of Kopano is in our public Git repositories which allows everyone to dive into the code. Want to work on a feature and provide a patch? Have a look at the CONTRIBUTING files in the individual repositories.


We are providing nightly builds of the Kopano software for various distributions. These builds are coming from the master branches of our git repositories and contain the latest developments.

Help with testing

For Kopano customers we are providing packages and package repositories with additional QA and testing. If you are an active community member you can apply for access to these downloads as well.

Send feedback – feature/bug tracking

We’d love to hear about your experience with the project! Running into an issue or seeing room for improvement? Report your issues or suggestions in our forum.

Community Projects and Resources

We are hosting a small but growing list of third party projects in relation to Kopano. Click on the topic list to directly jump to the according subsection of the list. Everyone is welcome to get involved by creating listing entries for their projects, suggest new categories, or participate in other ways. If you would like to contribute, please make sure to review the contribution guideline included in the repository.


Kopano Groupware Core

Kopano Core is the MAPI based server component at the heart of the Kopano stack. It provides collaboration features around email, contacts and calendaring and provides access to many different clients.

Kopano WebApp

Kopano WebApp is the main client to access all the features provided by the Kopano stack. It is themeable and flexible: it can be extended using add-ons. Many different add-ons are already available, such as Files and Web Meetings.

Kopano DeskApp

Kopano DeskApp adds features found in desktop applications to Kopano WebApp. As a native application built with NW.js it provides the flexibility to be used as the default email client on any platform while leaving all control at the WebApp server.


Z-Push, the leading open source ActiveSync implementation allows to synchronize and manage ActiveSync enabled devices. It supports mobile phones, tablets and with the new release of Z-Push 2.2.2, also Microsoft Outlook.


Looking forward to a career in open-source software? Great! We are growing our team, and we need your help!


Every year, Kopano team members visit various tech and open source conferences. Check out the posts below to learn more about their experiences.

FOSDEMWith booth & presentation at this great event!

Cebit Opensource forumPresenting in OS park & bowling

Open Tech Day UtrechtWith booth & presentation at this great event!

Chemnitzer Linux TagePresenting at this great event

Open Source Day OSB AlliancePresenting Iridium

Open Source DaysPresenting in Copenhagen

LibreConSponsoring & Presenting in Rome

FOSDEMFor the 2nd time present with a booth

Univention SummitEach year Univention partners, resellers and customers meet up

CLTOne of the biggest FOSS events in Germany