Zimbra Collaboration

Zimbra provides a self‑hosted server that combines email, calendar, and collaboration tools behind a web‑based interface. It stores all user data on premises, allowing organizations to retain full control over their information and to meet data‑sovereignty requirements. The platform follows open standards, which helps avoid vendor lock‑in and facilitates integration with a variety of third‑party applications.

Administrators can deploy the core system without a subscription, and the software is released under the GPL‑2.0 license, making it freely available and open source. It is positioned as a stable, production‑ready solution used by thousands of clients for enterprise‑level messaging and scheduling.

Zimbra’s feature set includes secure email handling, worldwide mailbox deployment, and extensibility through add‑ons and integrations with proprietary business solutions. The product is supported by a community and optional professional services, offering documentation, support portals, and localized partner assistance.