EFM is a German managed cloud services provider specializing in email collaboration, enterprise virtualization, and business telephony. The company supports businesses, educational institutions, and public-sector organizations with Zimbra, an open-source-based email and groupware platform. Customers can choose cloud hosting, dedicated managed servers, or on-premise deployment, with services including licensing advice and sales, migration, integration, training, hotline support, and ongoing system care. EFM’s hosting options provide email, contacts, calendars, tasks, file sharing, and team collaboration, alongside features such as backups, security controls, and client flexibility.

Beyond Zimbra, EFM offers enterprise virtualization based on Proxmox, positioned as an alternative to VMware and Microsoft Hyper-V for demanding Linux and Windows workloads. Its IP telephony services use STARFACE and are designed for flexible deployment and intuitive operation. EFM emphasizes secure, adaptable managed services and draws on more than 20 years of experience. The company reports serving over 750 customers, being a Zimbra partner since 2005, and supporting more than 10,000 users.