OX Open-Xchange
Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the following areas: • Open-Xchange Server 6 offers most comprehensive Groupware functionality based on modern user interface technologies and includes email, calendaring, contact management, intelligent document sharing, “smart linking” and much more. • The architecture is designed for deployment in the hosted market. • The architecture is designed for enterprises market Open-Xchange Server 6 was designed especially to fulfill the following requirements each of which is crucial for deployment in integrated hosting and enterprise infrastructures:
- Scalability to millions of users
- Multi Tenant / Multi Domain capabilities to serve hundreds of thousands small customers with one large data center
- Integration into existing hosting infrastructure and services to leverage existing services and to integrate in the hosting company's business processes
- Integration into enterprise environments
- Offer the necessary services and interfaces to integrate into an existing data center for automated administration, deployment and monitoring with 24/7 uptime 365 days a year (from http://software.open-xchange.com/OX6/doc/whitepaper/OX-Hosted-Architecture.pdf )