groupware and much, much more

The most advanced solution in communication and collaboration – a platform for EVERYONE!

exchange your exchange

Digital sovereignty: Decide for yourself whether on premise or in the cloud – with 100% control over your data!

Complete communication and collaboration solution

Digital, open source communication – in real-time at enterprise level!

Digital communication and collaboration on enterprise level

grommunio efficiently summarizes all requirements of modern, digital communication and collaboration. This includes the device and operating system independent management of sensitive data such as e-mail, contacts, calendar, chat, video conference, file sharing and much more – in real time.

With open source technology based on Linux, grommunio is scalable and meets the highest security requirements. Thanks to its advanced architecture, grommunio can be integrated into existing systems without great effort.

Emails, contacts, calendars in one platform

Increase your efficiency by managing emails, contacts, calendars, tasks and much more with just one platform.

With integrated enterprise-grade Active Sync, your data is available on all devices in real time.

grommunio tasks
grommunio calendar

Work efficiently and increase productivity

Invite directly from your calendar to online conferences with grommunio Meet, share files of all kinds in grommunio files and talk to your employees at the same time via grommunio chat.

Organize projects with shared folders and create schedules to see at a glance when your colleagues have time.

Enterprise-grade security

Secure communication and collaboration for your highest demands. You can sit back and relax knowing that your confidential information is protected with enterprise security.

Manage all your devices with grommunio Mobile Device Management. For example, if a smartphone is lost or a colleague leaves the company, you can remove all data and disable all access at any time.

grommunio email

First class compatibility

The appliance can be integrated into your existing environment at any time and can be used immediately with the following clients, among others.

Windows Mail

icon outlook



Apple Mail / iOS

Thunderbird Icon


and more

This is what distinguishes grommunio

sets grommunio apart icon-1

The appliance offers a wide range of interfaces … for optimal integration in a variety of environments.

sets grommunio apart icon-2

As the first open source solution – with a fully functional implementation of Outlook Anywhere (RPC-over-HTTP) and MAPI-over-HTTP, grommunio is the alternative to proprietary backends for native interoperability with Microsoft Outlook.

sets grommunio apart icon-3

With its efficient and optimized design, it even outperforms its proprietary counterparts in most areas.

sets grommunio apart icon-4

With the Linux platform as the basis, and the associated scalability and manageability, grommunio convinces with its large variety of implementation scenarios in your data center.


Your entire communication in just one platform!


With grommunio you send your mails as usual via Outlook, iOS or Android devices, as well as via grommunio Web.

Learn more


Continue to manage your contacts on all devices with the usual apps or with grommunio Web.

Learn more


Edit entries however is most convenient for you. grommunio syncs calendars on all devices simultaneously. grommunio syncs calendars on all devices simultaneously.

Learn more


Tasks can easily continue to be managed in your Outlook, on their mobile devices or in grommunio Web.

Learn more


Video conferences with grommunio Meet web-based or via app: high-performance, scalable, end-point secured and user-friendly.

Learn more


Enterprise chat systems for internal and external communication on a web and app basis.

Learn more


grommunio Files offers you unrestricted and secure access to all your shared documents and data from the office or on the go.

Learn more


The Office suite lets you create and edit complex documents, professional spreadsheets, and stunning presentations.

Learn more

Mobile Device Management

With Mobile Device Management, you can protect your data if a mobile device is lost. Stored data can be deleted by external access.

Learn more


The appliance has a wide range of interfaces with optimal integration in a large number of applications and environments.

Learn more

grommunio Partner Program

grommunio focuses on the indirect sales channel. Sales partners and distributors benefit from this. As a sales partner, you too can benefit from these growth opportunities and the excellent opportunities of the partner program.