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

IceWarp

• Small teams wanting email plus chat and meetings in one suite
• Organizations that want a self-hosted option alongside cloud

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

IceWarp

• Self-hosted licenses are priced per user per year; those amounts were not readable, so only cloud prices are listed.
• Booking and webinar mode require the Business tier.
• The pricing page offers the free trial and sales contact, not a self-serve card checkout.

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.

IceWarp

Email and calendar

Email server with calendar, contacts, notes and tasks, plus anti-virus and anti-spam.

Chat and TeamChat

Chat is in every tier, and Essential adds TeamChat for real-time team messaging.

Conferencing

Essential adds video conferencing with recording; Business adds webinar mode.

Documents

Collaborative document editing arrives in Essential.

Mobile sync

Mobile app on every tier and Exchange ActiveSync sync starting with Essential.

Desktop and mobile apps

The site lists Windows and Mac desktop apps and iOS and Android apps.

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.

IceWarp

• Core$1.35

  per user / month, billed annually ($1.50 billed monthly)

  2 GB email and 4 GB total storage per user, calendar, chat, files, notes and tasks.

• Essential$2.25

  per user / month, billed annually ($2.50 billed monthly)

  Adds 50 GB mail and 1 TB storage, document editing, conferencing and ActiveSync.

• Business$4.05

  per user / month, billed annually ($4.50 billed monthly)

  Adds 200 GB mail storage, booking and webinar mode.

Zimbra

Pricing could not be confirmed. See zimbra.com.

IceWarp

• Annual discount

  Annual billing lowers the per-user price

  Core is $1.35 per user / month billed annually versus $1.50 monthly, Essential $2.25 versus $2.50, Business $4.05 versus $4.50.

Zimbra

No public discounts listed.