Zimbra Collaboration vs iMail Server comparison

Progress Software and Zimbra are both solutions in the Email Applications category. Progress Software is ranked #18, while Zimbra is ranked #5 with an average rating of 8.0. Progress Software holds a 0.1% mindshare in EA, compared to Zimbra’s 8.8% mindshare. Additionally, 96% of Zimbra users are willing to recommend the solution.

iMail Server

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17 Comparison Views

Zimbra Collaboration

Read 29 Zimbra Collaboration reviews

2,827 Views
2,188 Comparison Views

96% willing to recommend

iMail Server

Zimbra Collaboration

Comparison Buyer's Guide

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Executive Summary

We performed a comparison between iMail Server and Zimbra Collaboration based on real PeerSpot user reviews.

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To learn more, read our detailed Email Applications Report (Updated: May 2025).

Buyer's Guide

Email Applications

May 2025

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Helped 851,604 peers since 2012

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

iMail Server

Ranking in Email Applications

18th

Average Rating

0.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Zimbra Collaboration

Ranking in Email Applications

5th

Average Rating

8.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of May 2025, in the Email Applications category, the mindshare of iMail Server is 0.1%, up from 0.1% compared to the previous year. The mindshare of Zimbra Collaboration is 8.8%, down from 10.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Applications

Featured Reviews

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Vidya Shree

CTO at Molecular Connections Private Limited

Deploys quickly and has a good web interface

Zimbra Collaboration has a good web interface When it comes to administration tasks like configuring specific filters or group signatures, I have to dig into the configuration since there's nothing in the graphical or web interface. The solution’s forums don't have much information or…

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Top Industries

By visitors reading reviews

No data available

Computer Software Company

19%

Comms Service Provider

Government

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

Questions from the Community

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How does Zimbra Collaboration compare with Microsoft Exchange?

Zimbra is a free, open source collaborative software suite. The features I like best are the ease of integration and the email, calendar, and collaboration server with web interface. In addition, I...

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What do you like most about Zimbra Collaboration?

The most valuable feature of Zimbra for our team's productivity is its efficiency in handling email communication.

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What is your experience regarding pricing and costs for Zimbra Collaboration?

The solution is competitively priced.

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Comparisons

No data available

Microsoft Exchange vs Zimbra Collaboration

Compared 29% of the time

Open-Xchange vs Zimbra Collaboration

Compared 20% of the time

KerioConnect vs Zimbra Collaboration

Compared 16% of the time

IceWarp vs Zimbra Collaboration

Compared 10% of the time

Microsoft Exchange Online vs Zimbra Collaboration

Compared 6% of the time

More Zimbra Collaboration Competitors

Product Reports

Buyer's Guide

Email Applications

May 2025

Download iMail Server product report

Buyer's Guide

Zimbra Collaboration

April 2025

Download Zimbra Collaboration product report

Also Known As

Progress iMail Server

No data available

Overview

iMail Server is a complete email messaging solution designed for small to mid-sized businesses and is backed by the industry’s best technical support team.
iMail Server is a complete Windows email server with SMTP, POP, IMAP, LDAP, and List Server. iMail users can send and receive email using any standards-based client, including Microsoft Outlook® and Outlook Express®. Or, users can access email via iMail’s customizable Web messaging.
Admin Friendly, Team Builder, Adaptable,

Progress Software

Zimbra Collaboration provides administrators and their end users innovative features that solve the challenges faced by organizations using today's legacy communications infrastructure.

Zimbra

Sample Customers

Keystrokes Transcription Service, Inc, Korean Air, Nascar, WebMD

NEC Biglobe, City of Ventura, Monterey Bay Aquarium Research Institute, Hola Publishing, BIG, Sleepwell, LaFayette College, Xmission, DNA, Ring Line, Future Group, TIGC

Find out what your peers are saying about Google, Microsoft, Amazon Web Services (AWS) and others in Email Applications. Updated: May 2025.

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851,604 professionals have used our research since 2012.

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We monitor all Email Applications reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.