Zimbra: email and calendars under your control
Zimbra is the platform for email, calendars and contacts when your data should stay in Switzerland and under your control. We run Zimbra on servers in Switzerland and migrate your mailboxes from Exchange or Microsoft 365.
What is Zimbra?
Zimbra is a platform for email, calendars, contacts and tasks, comparable to Exchange. It runs on your own Linux servers or with a Swiss hosting provider. Staff keep working with Outlook, in the browser or on their smartphone.
At a glance
- Operated on servers in Switzerland
- Outlook, webmail, iPhone and Android
- Shared calendars, folders and resources
- No vendor access to mailboxes
- Beyond a certain size, often cheaper than Microsoft 365
Why Zimbra
Data stays in Switzerland
Mailboxes, logs and directory are stored on servers in Switzerland, not with a cloud corporation.
Your own rules
You decide on access, retention and contract terms. No unilateral changes by a cloud provider.
Familiar to use
With the Outlook connector of the Network Edition, Outlook syncs email, calendars and contacts as before.
Costs that scale
Server and support are spread across all mailboxes. From a certain number of users, Zimbra is often cheaper to run.
What we take care of
Operations, security and migration from one source.
- 1
Operations in Switzerland
We run Zimbra in our infrastructure in Switzerland or on your own servers.
- 2
Migration
Mailboxes, calendars and contacts from Exchange, Microsoft 365 or IMAP are moved, usually over one weekend.
- 3
Security
Spam filtering with Proxmox Mail Gateway, SPF, DKIM and DMARC, updates and monitoring.
- 4
Archiving
Complemented by MailStore for compliant archiving under Swiss retention rules.
Who Zimbra is right for
Those who rely heavily on Teams and SharePoint usually do better staying with Microsoft 365. We give you honest advice.
- Medical and therapy practices, counselling services
- Law firms and fiduciaries bound by professional secrecy
- SMEs that want to reduce their dependence on US providers
- Companies whose Exchange support is ending
Frequently asked questions
Your question is not listed? Ask us directly.
Can we keep using Outlook?
Yes. The Network Edition includes a connector that syncs email, calendars, contacts and tasks into Outlook.
How long does a migration take?
For an SME with 10 to 50 mailboxes, a few days of preparation and usually one weekend for the switch.
Does Zimbra work on smartphones?
Yes. iPhone and Android connect using their built-in mail and calendar apps.
Who has access to our email?
Only you and, on your instruction, us as the operator. The vendor supplies software and updates but has no access to mailboxes.
Related insights
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- EmailNew Microsoft 365 clause: who decides about your email?Since 1 November 2026, Microsoft may pass certain Microsoft 365 content to a US reporting centre. What the clause means and when self-operated Zimbra is the better choice.Read
- EmailExchange Server without support: the options for your emailExchange 2016 and 2019 lost support in October 2025, and the last security updates end in October 2026. Three ways forward for SMEs and how to plan the move.Read
Let’s talk about Zimbra.
Tell us what's bothering you. We listen, look at your situation and tell you honestly what makes sense.