Kopano Groupware is an email and calendaring solution, which can be operated digitally sovereign. Its functionality is comparable to that of Microsoft Outlook and Exchange. Users can access their data via browser with the Kopano WebApp. Other clients can be connected via various interfaces.
Please note: The EOL of Kopano Groupware has been announced for 2025. Kopano Groupware is being succeeded by products and services based on Kopano Cloud. Please refer to this blog post for a quick overview.
Kopano Groupware is an email and calendar server that provides users with their daily communication and organizational data on all devices and connects teams. Data can be jointly edited in public folders or shared with others from your own inbox.
In today’s as-a-Service world, things like email or calendars are part of the infrastructure. Regardless of the interface to the user, other services and applications must be able to access this data in a standardized and reliable way.
For Kopano Groupware we provide a RestAPI whose properties are based on Microsoft Graph. For the connection of other services, this means that the integration of one service already includes a large part of the connection to the other service. We see this interoperability and the resulting interchangeability as an important contribution to digital sovereignty.
Kopano Groupware is the only open source MAPI server worldwide. MAPI, the Messaging API, describes the data model that also underlies Microsoft’s e-mail and calendar services. It enables even complex multi-dimensionally linked elements such as invitations to recurring appointments with exceptions to be stored without errors.
Beyond the data storage, Kopano Groupware uses existing and proven Linux services.These are for example MTAs like Postfix, MariaBD/MySQL databases, Docker, Kubernetes, …
