Deploy Email and Collaboration
Your Way. Your Data. Your Rules.
Built securely on open standards, Zimbra delivers complete data sovereignty that others can't offer.
Stay Safe with Secure Email
Secure Collaboration, Without Compromise
200 Million+
Mailboxes Deployed Worldwide
Zimbra powers email and collaboration for hundreds of millions of users —delivering complete data autonomy and industry-leading flexibility for enterprise communications globally.
20+
Years of Proven Stability
Zimbra powers mission-critical communications for 1,000+ highly regulated global institutions across finance, government, education and many other sectors. Our email collaboration suite is trusted by over 6,000 organizations in 127 countries, and in 24 languages.
3000+
Partners for Localized Support
Zimbra combines global expertise with a unique network of local partners who understand your market’s compliance demands. They deploy and support cloud, hybrid, or on-premises to meet local regulatory and data residency requirements.
Why Zimbra?
The Platform for Complete Data Sovereignty
Trusted Alternative to Technology Giants
A proven, enterprise-grade alternative trusted by organizations worldwide for decades, Zimbra offers a secure, non-disruptive, low-risk alternative to technology giants for enterprises that require control, compliance, and deployment flexibility.
Your Data, Your Choice
With Zimbra, you control where your data resides. With flexibility to deploy on-premises, in a private cloud, or in regional data centers, Zimbra ensures your data stays under your jurisdiction and helps maintain compliance with evolving data sovereignty regulations.
Open Source Transparency
Zimbra’s open, auditable code provides complete visibility into your email infrastructure. Meet the most stringent regulatory and security standards with full transparency — eliminating the black-box risks of proprietary platforms.
Scalability Without Compromise
Scale on your terms — from 10 users to 10 million, Zimbra performs consistently across deployments of any size. Grow on your timeline with simplified administration and uninterrupted collaboration, delivering the enterprise-grade flexibility that one-size-fits-all solutions can’t.
Open Standards = Zero Lock-In
Built to open interworking standards, Zimbra integrates seamlessly with your preferred tools and your existing workflows, giving you the flexibility and freedom to build the environment that best suits your business — eliminating vendor dependency and increased licensing costs that proprietary platforms create.
Email and Collaboration. Hosted Your Way.
Intuitive email interface that keeps you organized and productive. Manage your inbox seamlessly while connecting to collaboration tools across your organization. Share files, schedule meetings, or jump into real-time chat — everything unified in one place.
Briefcase: File Management Simplified
Store, manage, and share files securely with Briefcase without relying on third-party storage providers. Your documents stay accessible exactly where you need them.
Key capabilities:
- Centralized Storage — Server-side file storage that keeps documents secure and accessible organization-wide
- Granular Access Controls — Share files confidently with permission settings that determine who can view, edit, or download
- Version Tracking — Maintain document history and roll back changes when needed
- Organized File Management — Create folders, tag documents, and structure your file library for easy retrieval
- Seamless Integration — Access and share files directly from email, chat, or calendar without switching platforms
Whether you’re collaborating with teams, or archiving for compliance, your documents remain accessible exactly where you need them.
Chat
Keep your team in sync with enterprise-grade messaging. Collaborate instantly, share files, organize groups, search message history, and find channels — all within your secure communication environment.
Basic Chat
Perfect for one-on-one conversations, Basic Chat integrates seamlessly into your workflow for quick and efficient personal communication.
Advanced Chat
Elevate team collaboration with enterprise-grade messaging that includes:
- File sharing
- Group chats
- Message history search
- Channels
Whether you’re handling daily communication or coordinating complex projects, Zimbra Chat scales to your needs. For more details, refer to the Zimbra Chat User Guide and Administrator Guide. Download the Zimbra Chat Datasheet to explore the full capabilities.
Calendar
Coordinate effortlessly with shared calendars designed for teams and enterprises. Schedule meetings, set reminders, and manage resources — all while maintaining visibility across departments and time zones.
With full mobile access via native apps and ActiveSync, you can view calendars, respond to invites, and stay in control anytime, anywhere, on any device.
Office: Create, Edit, and Collaborate
Work smarter with integrated tools for document creation and real-time collaboration — no third-party subscriptions required.
Key capabilities:
- Real-time secure collaboration
- In-browser editing for documents, spreadsheets, and slides
- Full support for open-office formats ensures consistent formatting across tools
- Universal File Compatibility: Support for popular file types including docx, xlsx, pptx, odt, ods, odp, pdf, txt, rtf, html, epub, csv, and more
Anywhere, Anytime Access:
Web • Mobile (ActiveSync) • Desktop (Offline)
Zimbra’s clean, consistent interface ensures seamless collaboration whether you’re at your desk, on the go, or working offline. Connect using your preferred platform without sacrificing functionality or security.
- Exchange ActiveSync (EAS): Mobile Integration
Sync email, calendars, contacts, tasks, and shared folders across all EAS-compatible devices in real time. No additional clients required—stay connected on iOS, Android, and beyond.
- Zimbra Connector for Outlook (ZCO)
Integrate seamlessly with Outlook for Windows, Mac, and Web. Access synchronized emails, calendar overlays, global address lists, and modern OAuth2 authentication—directly within your existing Outlook environment.
- Exchange Web Services (EWS)
Deep integration with any EWS-compatible client for advanced capabilities including real-time calendar lookups, delegation, resource booking, and server-side search. No add-ons required.
- Desktop (Offline)
Stay productive offline. Zimbra Desktop syncs your emails, calendars, contacts, and tasks so you can work anywhere and reconnect seamlessly when back online.
For the full list of supported platforms and clients, see the Admin Guide: Client Compatibility Overview.
Security and Compliance
Zimbra delivers robust capabilities designed for data sovereignty, streamlined administration, and regulatory compliance.
Security and Compliance
- Mobile Device Management (ABQ)
Allow/Block/Quarantine capabilities automatically restrict unauthorized devices without disrupting legitimate productivity. - Two-Factor Authentication (2FA)
Add an extra layer of protection with two-factor authentication for secure user logins across your organization. - S/MIME Encryption
Enable email signing and encryption to ensure message authenticity and confidentiality for sensitive communications. - Single Sign-On (SSO)
Zimbra functions as a SAML Service Provider, integrating seamlessly with identity providers like Keycloak, Cisco Duo, and JumpCloud. Users access Zimbra through your unified corporate login portal, optionally incorporating MFA via your SAML provider. - Compliance Archiving
Archive emails with tamper-evident controls and full auditing capabilities to meet stringent regulatory standards and legal discovery requirements.
Administrative Control
- Multi-Tenancy
Manage multiple organizations or departments on a single instance with distinct policies and settings for each tenant—ideal for organizations or enterprises with diverse business units. - Delegated Administration
Assign granular admin roles by group or function, enabling distributed management while maintaining centralized oversight and control.
Performance and Reliability
- Hierarchical Storage Management (HSM)
Configure internal and external storage volumes—including S3-compatible object stores—directly from the Admin Console. Set policies to offload older emails, attachments, or archives to secondary storage for cost efficiency. HSM capabilities include compression, deduplication, and rule-based data movement for optimized long-term retention. - Backup & Restore
Zimbra’s backup system ensures reliable data protection without service interruption. Choose auto-grouped backups for faster, incremental operations or standard full backups for comprehensive coverage—both options deliver flexibility for any deployment environment.
Trusted by thousands of clients
“Zimbra, combined with a shared infrastructure managed by SITIV, ensures full digital sovereignty for the Rhône basin while cutting our messaging costs in half. A reliable, collaborative solution that fully respects our public service priorities.”
Syndicat Intercommunal des Technologies de l’Information pour les Villes
Government
“Zimbra has continually expanded our awareness of the diverse, creative ways organizations collaborate globally — from small teams to enterprises across 100+ countries. We use Zimbra because it’s the best available tool to deliver a profitable, scalable, reliable, personalized, and open-source alternative to Google and Microsoft.”
Cloudiance
Business Service Provider
“We wanted Zimbra — a reliable and efficient email and collaboration solution that could adapt to the framework and the size of our organization with 110,000 mailboxes. Zimbra is reliable, and the administration of this platform is facilitated by very efficient tools. All user operations are tracked, which is reassuring for an email administrator.”
Université de Lorraine
Education
“As cyber-attacks become increasingly sophisticated, educating users is no longer enough. With Zimbra’s on-premises solution and robust 2FA, our email system is both secure and agile—ideal for our evolving digital landscape.”
Kyoto University of Education
Education
Get Started with the Right Email Solution
Flexible Plans for Every Business Need
Features |
Standard
|
Professional
|
| Email, Contacts & Calendar | ||
| Sharing & Delegation | ||
| Basic Chat | ||
| S/MIME, Two-Factor Authentication & more | ||
Expanded Features |
||
| Outlook for Windows | ||
| Mobile Push (Active Sync) | ||
| Archiving and Discovery |
Support Levels
Zimbra offers different Technical Support Levels, so you can select the one that best fits your Business needs
Support Types |
|
| Premier | Standard |
| In addition to Standard Business Hours support, includes 24 × 7 support for Severity-1 issues | Business-Hours support only, not intended for high-visibility production platforms |
Premier Add Ons |
|
| Elite | |
| Prioritized organizational relationship with Zimbra, including additional packaged Support Services | |
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