grommunio

Can grommunio be evaluated as an alternative collaboration platform?

Many organizations review platforms such as Microsoft 365 or Google Workspace when reassessing their collaboration infrastructure. grommunio provides an open-source communication platform supporting email, calendar, contacts, chat and file collaboration. The platform can be deployed on-premises, in private cloud environments or through certified hosting partners, giving organizations full control over infrastructure and data.

Can grommunio work with Microsoft Outlook and Exchange communication protocols?

Yes. grommunio supports widely used Exchange communication protocols such as MAPI / HTTP, EWS and Exchange ActiveSync. This allows organizations to continue using existing Microsoft Outlook clients while operating their collaboration infrastructure on their own servers or through hosting partners.

Is grommunio GDPR compliant?

grommunio is designed as a European open-source software solution that enables GDPR-compliant deployments. Actual compliance depends on the specific implementation, hosting model and organizational measures.

Where is grommunio data stored?

Data is stored exclusively where the organization operates its infrastructure — on-premises, in a private cloud or with a European hosting partner. grommunio itself does not store customer data.

Which industries and organization sizes is grommunio designed for?

grommunio is particularly suited for public administrations, healthcare organizations, educational institutions, financial service providers, and companies with high compliance and data protection requirements. The platform is highly scalable and can be deployed in small organizations starting from approximately 6 users as well as in large multi-tenant environments with more than 100,000 users. Based on a Linux architecture, open standards, and flexible deployment options, grommunio supports regulated industries, mid-sized enterprises, and international corporations alike.

Where is grommunio developed and based?

grommunio GmbH is headquartered in Vienna, Austria — at the DC Tower, Donau-City-Straße 7. All development happens in Europe, and the company is independent and owner-managed.

What's the relationship between grommunio and gromox?

gromox is the open-source engine — the set of services (gromox-http, gromox-zcore, gromox-midb, gromox-imap, gromox-pop3, gromox-delivery, …) that speak the Exchange-compatible and IMAP/POP3/SMTP protocols. grommunio is the complete platform built around gromox: the web applications (Web, Chat, Meet, Files, Office), the admin tooling, the gateways (grommunio-sync for EAS, grommunio-dav for CalDAV/CardDAV), and the enterprise components.

Is grommunio open source?

Yes. The core engine (gromox) and the surrounding components are released under open-source licenses on GitHub (github.com/grommunio) and Codeberg (codeberg.org/grommunio). A commercial subscription adds long-term maintenance, manufacturer support.