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.
Email: Where Collaboration Starts
Intuitive email interface for seamless inbox management. Share files, schedule meetings, and access real-time chat — all unified in one platform.
Aside from email communication your Zimbra inbox is a starting point for content sharing & collaborating, chats and video meetings. Zimbra’s responsive web client is accessible from anywhere on any device and allows seamless transition between Zimbra’s applications. Users can compose multiple emails and easy switch between chatting with co-workers, editing documents or reviewing their calendar.
If you forget to add something to your email right after hitting the Send button or have simply forgotten to include an important recipient. Zimbra’s undo send feature gives you a few seconds to stop the message sending so you can make any changes. Zimbra Emails can also be scheduled to send at a future date and time.
Chat: Connect Instantly, Securely
Keep your team in sync with enterprise-grade messaging. Use Basic and Advanced Chats to collaborate instantly, share files, organize groups, search message history, and find channels — all within your secure communication environment.
Elevate your team’s communication with Zimbra Chat (now available with Zimbra Daffodil 10.1.7 and above) – a secure, real-time messaging solution that prioritises your privacy and data sovereignty, giving you full control over your information.
Choose the Chat Experience That Fits Your Needs
Basic Chat
Ideal for quick, one-on-one conversations. Seamlessly integrated into your workflow for personal communications.
Advanced Chat
Unlock powerful collaboration features:
Group chats, chat search, channels and file sharing.
For detailed guidance, refer to the Zimbra Chat User Guide and Administrator Guide.
Calendar: Stay organized, in sync — and on the move
Plan meetings, set reminders, and coordinate across teams with shared calendars. Whether you’re scheduling a quick check-in or managing a complex project timeline, Zimbra ensures everyone is aligned. And 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.
Zimbra’s calendar application helps your businesses stay organized and productive, offering a variety of features that can help businesses improve their communication, collaboration, and efficiency.
If you’re looking for a way to improve your business’s productivity, communication, and efficiency, Zimbra’s calendar application is a great option.
Briefcase: File Management Simplified
Store, manage, and share files securely with Briefcase. Your documents stay accessible exactly where you need them.
With its core server data storage, seamless file sharing capabilities, and integrated online office editing, Zimbra Daffodil (version 10) empowers organizations to streamline workflows, enhance collaboration, and improve productivity. Experience the future of document management with Zimbra Daffodil (version 10).
Office: Create, Edit, and Collaborate
Work smarter with integrated tools for document creation and real-time collaboration, no third-party subscriptions required.
Seamlessly accessed right from within the Zimbra Web Client. Create complex documents, professional spreadsheets, and stunning presentations. Popular formats supported: docx, xlsx, pptx, odt, ods, odp, doc, xls, ppt, pdf, txt, rtf, html, epub, csv. Fully compatible with OOXML formats.
If you are looking for a way to improve your business’s productivity, collaboration, security, and cost-effectiveness, Zimbra Office will help you achieve those goals.
Anywhere, Anytime Access:
Web • Mobile (ActiveSync) • Desktop (Offline)
Zimbra’s consistent interface keeps collaboration uninterrupted across all your devices. Access email, calendars, and files on the web, sync on mobile via ActiveSync, integrate with Outlook (ZCO), or work offline with desktop. Connect using Exchange Web Services (EWS) for advanced capabilities — your choice, your way.
It offers a responsive user interface that is easy to use across devices, has intuitive navigation, supports customizations, is secure and accessible
Zimbra Desktop provides a seamless way to access all your Zimbra content when connectivity is limited. It is an email client that you install on your desktop. Re-read your messages and compose new ones with ease.
Zimbra syncs automatically and delivers any new email in/out of your mailbox as soon as your device goes online.
Available for Windows and Mac OS, Zimbra Desktop is available under license.
Zimbra’s mobile module allows you to synchronize your Zimbra mailbox and shared folders on any ActiveSync device without any additional or third-party client.
Shared Folder Sync
Now you can synchronize calendar and contacts that has been shared with you in Zimbra to your device.
More Reliable. More Control. Adaptable.
Zimbra’s core mobile module is tweaked and optimized to be compatible with the vast majority of devices on the market. The new mobile UI included in the Zimbra Administration Console gives you full control over your devices. It grows and adapts to your needs, not the other way around.
Admin Capabilities
Zimbra delivers robust capabilities designed for data sovereignty, streamlined administration, and regulatory compliance:
- Security and Compliance: Advanced security including 2FA and S/MIME, seamless SSO (via SAML) integration, and full data sovereignty and archiving for compliance.
- Administrative Control: Powerful multi-tenancy and granular delegated admin controls for centralized, scalable management.
- Performance and Reliability: Centralized storage management and hot backups ensure efficient data retention with zero downtime.
For more information on our core features and capabilities, view here.
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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