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

SmarterMail

• SMBs and ISPs replacing Exchange with a cheaper server
• Small setups that fit the free 10-mailbox edition

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

SmarterMail

• ActiveSync (from $325 for 25 mailboxes), MAPI/EWS and the antispam and antivirus engines are paid add-ons.
• The pricing page does not say whether base licenses are one-time or annual.
• Antispam and antivirus add-ons need an annual license with active maintenance and support.

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.

SmarterMail

Webmail

A browser interface the vendor compares to Outlook on the web, with calendars, contacts, notes and tasks.

Shared collaboration

Shared calendars, contacts, tasks and notes, plus file storage under your own control.

Meetings and chat

Enterprise adds online meetings with screen sharing, scheduling and voice and video chat.

Archiving

Built-in archiving of email and chats for regulatory needs such as SOX and HIPAA.

Outlook and mobile sync

Enterprise can add MAPI and EWS for Outlook and Exchange ActiveSync for phones, both priced separately.

High availability

A clustered edition with hubs, nodes and centralized storage for fault tolerance.

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.

SmarterMail

• Free$0

  One domain, up to 10 mailboxes; the vendor says it has 99% of Enterprise functionality.

• Professional$550

  for 50 mailboxes; billing term not shown

  Webmail, shared calendars, contacts, tasks, notes, file storage. $2,500 for unlimited.

• Enterprise$700

  for 50 mailboxes; billing term not shown

  Adds meetings, scheduling, chat and archiving. $1,500 at 500 mailboxes.

• Enterprise, unlimited$3,200

  for unlimited mailboxes; billing term not shown

  Enterprise edition with no mailbox cap.

• High Availability$250

  per hub / month; nodes $300 per month

  Clustered hubs and nodes for unlimited users and domains; first 30 days free.

Zimbra

Pricing could not be confirmed. See zimbra.com.