Kopano vs Zimbra (2026): which should you pick?

Kopano

• Hosting providers reselling mail under their own brand
• Organizations that need mail hosted in a chosen EU location
• Teams that want to keep using Outlook against their own server

Zimbra

• Companies and schools that need to keep email on servers they control
• Hosting providers offering white-labeled email to customers
• Teams moving off Microsoft Exchange who want Outlook compatibility

Kopano

• No prices are published; access starts with a demo, a meeting and a proof of concept.
• The site is written for partners and managed service providers, not for individual buyers.
• The earlier Kopano Groupware product reached end of life in 2024 and was replaced by Kopano Cloud.

Zimbra

• Pricing is not published; Zimbra is licensed, and renewals go through an account manager.
• The FAQ calls the Open Source Edition end of life, with no updates or support.
• Features such as backup and restore, Zimbra Office and large-scale mobile sync need the commercial license.
• Chat and real-time collaboration are protected in transit only, not end-to-end encrypted.

Kopano

Web mail and calendar

A browser client covers email, calendar, contacts and tasks, with out-of-office replies, mail filters, shared folders and free/busy scheduling.

Outlook and mobile connectivity

Outlook connects natively through autodiscover, phones and tablets use ActiveSync, and other clients can use IMAP, POP3 or EWS.

Container deployment

The stack ships as OCI (Docker) containers that are meant to be deployed and updated in the customer's own environment.

Multi-tenant administration

A multi-tenant design with a self-management interface for tenant admins, a REST API for automation and an agent for LDAP or Active Directory sync.

Branding

Central branding settings let a provider change colors in the web interface and optionally supply branded end-user documentation.

Zimbra

Mail, calendar and contacts

A web client with advanced and attachment search, personal and global address lists, group and resource scheduling, and tasks.

Two editions

Zimbra Daffodil (v10) needs a license, sold as Professional or Standard. Professional has additional features over Standard.

Desktop and mobile access

Zimbra Desktop for Windows, macOS and Linux, a Connector for Outlook on Windows, and ActiveSync on iOS and Android.

Standards-based clients

Works with IMAP, POP, CalDAV and CardDAV, so Thunderbird, Apple Mail and similar clients can connect.

Security and admin controls

Built-in anti-spam and antivirus, two-factor sign-in, LDAP or Active Directory, SAML sign-in and delegated administration.

Deployment options

Install on your own servers, run it in the cloud on AWS or OCI, or use a hosting partner, with multiple domains per install.

Kopano

Pricing could not be confirmed. See kopano.cloud.

Zimbra

Pricing could not be confirmed. See zimbra.com.