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IceWarp vs Microsoft Exchange vs Zimbra Collaboration comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

Mindshare comparison

As of May 2025, in the Email Applications category, the mindshare of IceWarp is 5.3%, down from 6.1% compared to the previous year. The mindshare of Microsoft Exchange is 11.4%, down from 12.2% 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

AvinashLotke - PeerSpot reviewer
Useful for collaboration and storage but improvement is needed in API integration
The solution has traditional SSL integration, SAML, and Federation Services. In its latest version, it added SAML integration. However, it needs to work on API integration, especially for dashboards or integration with SAP for log and data system management. It doesn't yet have the kind of API that Google and Microsoft provide for synchronizing users with Active Directory. I think IceWarp needs to improve in a few areas. They have two types of admin consoles - a web-based one and a remote one. I'd like to see these combined into a single web-based admin console. The log reading and information system also needs improvement. The current way of showing incoming and outgoing logs isn't very clear. For new users, it's hard to understand these logs, especially compared to Office 365 and other systems with easier-to-read logs. They should also add an export option to get all logs with a single click whenever we need them.
Hesham Hussain - PeerSpot reviewer
A good solution for large enterprises, but is expensive when compared to other solutions
Regarding the decision of increasing the number of users, it depends on the organization's choice, whether to opt for CapEx or OpEx. Both options involve expenses over the years. Building an in-house Exchange solution requires investing in hardware, storage, connectivity, and administrative resources. Office 365 shifts the budget solely to OpEx as a subscription service. Scalability is another factor. Starting a new company favors Office 365 due to cost efficiency. As the organization grows, the choice depends on available resources and technical expertise. An internal Exchange setup is feasible with skilled engineers, while Office 365 suits those lacking in-house resources.
Muhammad Talha Baig - PeerSpot reviewer
One of the premium features was customized rooms tailored to the collaboration needs
Zimbra's strength lies in its individuality, and it should focus on leveraging its unique features rather than trying to emulate competitors. My organization has certified Zimbra technicians, so we believe we can utilize Zimbra certification. However, I was recently informed by Zimbra that no such certification exists. I have recently completed the test kit, and after the training, I will gain access to tickets. Therefore, if any clients are experiencing issues, we have a certified technical team available to provide support 24/7. This is how we can cater to our client's needs. I recommend Zimbra to small-scale and enterprise customers. Anyone, even those with 5 users, can opt for Zimbra. Overall, I rate the solution a nine out of ten.

Quotes from Members

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

Pros

"The solution is easy to manage and includes features such as smart documents and the archiving of user data."
"The solution's voice services work well for our company."
"An effective, functional, very good tool for controlling resources."
"The TeamChat feature has been really good for our email management. It lets us collaborate, share files, and invite guests like Google Spaces or Microsoft Teams. I like the two-factor authentication for security. However, they need to improve their document collaboration tools, as their Word, Excel, and PowerPoint features are basic compared to Microsoft and Google."
"The groupware module is the most valuable feature."
"Its price is the most valuable. It is definitely one of the lowest price solutions."
"The most valuable feature of IceWarp is the chat rooms and file-sharing, they are useful. It is convenient that everything is in one place. You can easily share and collaborate documents, making the program's unity a significant advantage."
"It has great communication capabilities for team chatting and web conferences."
"The technical support is fine."
"Microsoft Exchange is stable."
"It integrates well with other tools."
"The integration of Microsoft Exchange with other tools allows for seamless collaboration and increased productivity within teams."
"The solution can scale well."
"One of the most valuable features of Microsoft Exchange is its security."
"It ensures high availability and resilience, allowing seamless recovery from potential failures and making it a reliable option for business-critical operations."
"It's an excellent product from Microsoft. It provides more flexibility to the end-users. As it's connected with Teams, it also enables collaboration."
"The logs, troubleshooting, and tracking we have found to be the most valuable features. We have any issues with lost messages the features are useful. It is very easy to track and log."
"The Zimbra Collaboration's most valuable feature is web access."
"Zimbra Collaboration has a good web interface."
"The product is easy to set up."
"The most valuable feature is sending messages as well as text and documents. It's a big solution for us since internal communication is a must in our organization."
"Zimbra Collaboration's sharing features are most valuable."
"Zimbra Collaboration has integrated a lot of their party tools and they have good documentation available."
"Network NG Modules are valuable to us."
 

Cons

"I would like to have a trial for mobile applications and more documentation similar to Google Drive with mobile applications."
"The solution needs improvements in security, particularly regarding document management."
"It is difficult to disable user rights on the console so some users accidentally delete their documents or user details."
"Although the documentation is extensive and in depth, you must familiarize yourself with it before taking full advantage of the product."
"Although it is not a tool, video conferencing should be scalable and operate in a professional and efficient way."
"Our customers sometimes have problems receiving mail."
"The solution should improve the mailing list feature. Google has a similar feature where you can automate sending files to different people in a sequence, but that feature is no longer available in the current version of IceWarp. Other features may also have been removed in the current version."
"The tool's configuration capabilities are not straightforward. Apart from that, if I want to archive emails into a vault so that they can be retrieved again later, the integration doesn't work, and IceWarp crashes."
"Exchange can be a little finicky, sometimes, or flakey. Last week, for example, I had gone into my calendar to check on some briefings that I had established, and then went back into my inbox, and suddenly the view had changed. I had no idea what it was that I had done, and I couldn't figure out how to get that view back. I took a productivity hit as a result of that, trying to fix it, due to the fact that it just wasn't what I wanted. It wasn't what I was used to working with. Two different tech support people had to work with me in order to get the view back to what I wanted just so I could be productive."
"The licensing model could be improved."
"At the end of the day, the biggest area for improvement is having better and more knowledgeable support technicians."
"When an update wants to come, it should just come maybe once or twice rather than having us deal with constant updating."
"The biggest issue with Microsoft Exchange is its high cost, especially in pricing for license upgrades and expansion to more users."
"From a security perspective, Microsft Exchange can be improved. All that needs to be added is security, but that's an internal hierarchical problem from the product itself and not the end-users."
"There is a problem when scheduling an event for the whole day."
"The management of .pst files and archiving need improvement."
"We have had an issue with security."
"Some issues cause the solution not to function correctly or to cause downtime once a month."
"File sharing permissions with Nextcloud integration need improvement."
"The solution could improve by making it easier to use."
"The solution’s forums don't have much information or documentation on administration tasks."
"I can confidently say that Zimbra is good enough for 2,000 client users. But, at the same time, if my client needs more than that and we have two options—Zimbra or Microsoft—I'm going with Microsoft because many admins will speak to Microsoft's ability to handle that many."
"Zimbra must improve its solution to make it easy so that the users don't have to use webmail to connect to their accounts and log in to webmail every time. This is something that is lacking in Zimbra Collaboration. They should provide a better way to easily connect email applications on the desktop to the Zimbra server. They should also try to have more functionality for storage management, like Microsoft Exchange. Currently, the management of the email data must be done manually in Zimbra Collaboration, which we are finding very difficult. They should provide a way to save emails so that you can have more space on the server and storage. Because of the lack of this functionality, we are planning to migrate to Microsoft Exchange. Microsoft Exchange provides a better way to manage storage than Zimbra Collaboration. You cannot have a mail solution without storage management because emails will always increase. Zimbra Collaboration also needs tools for management. More back-office tools are required to manage the whole mailbox and space. You don't only manage emails but also the documents attached to the emails. Therefore, you require tools to select and decide what do you want to save or how do you want to free up space in your infrastructure."
"The solution could use more integration with third-party tools."
 

Pricing and Cost Advice

"The license is based on the number of users."
"It is definitely one of the lowest price solutions."
"I would rate the pricing and eight out of ten."
"Our licensing is on a yearly basis. There were no additional costs."
"Costs far less than other solutions."
"I don't see any challenges for the Indian market. For example, 1 GB is available for around 399 INR, and 2 GB for 499 INR. They offer a range of plans, from basic to professional and enterprise, with multiple features. IceWarp's aggressive pricing is competitive compared to other market solutions like Zoho and Microsoft. One significant advantage is that IceWarp does not impose user capping like Google and Microsoft, which allows for substantial cost savings and flexibility in user conversion."
"The solution is priced well."
"The solution is inexpensive which is its main benefit."
"Since my company is on Microsoft Cloud, we pay for the licenses per user. Compared to volume licensing, I would say the present licensing cost is not expensive."
"It's working very well. There is no problem, but the price is not the best."
"Microsoft Exchange is an inexpensive application."
"Microsoft Exchange itself does not require a license, but users who will have mailboxes will require a license. It depends on the number of users to choose which license. If you exceed 2,000 mailboxes, it's preferable to get the enterprise license."
"We renew the product license with Microsoft every three years. The cost is included within a bundle of services. It's an enterprise agreement with Microsoft."
"They are flexible when it comes to pricing, unlike most of the other vendors I have dealt with."
"Licensing costs for Microsoft Exchange have increased, but are still fair. For some users, the cost is high considering the number of functions and features they will use."
"I don't have enough information about the licensing costs of Microsoft Exchange, but I do know that you need two types of licenses to run it. You need the product key and the client access key to activate Microsoft Exchange. This means that apart from the standard Microsoft Exchange licensing fees, you have to pay additional costs."
"The solution is not expensive compared to other products."
"There is an annual standard licensing fee to use Zimbra Collaboration and there is no other cost."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the price a four"
"If you choose the network edition, it is a little pricier. They have the open-source edition too which is only community supported."
"The solution is competitively priced."
"Zimbra Collaboration offers a good price-to-feature ratio."
"We pay yearly licenses for Zimbra Collaboration."
"We are using perpetual licenses. We have deployed it in our local data center, and we buy perpetual licenses on a per-user basis."
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Top Industries

By visitors reading reviews
Computer Software Company
18%
Comms Service Provider
10%
Manufacturing Company
9%
Financial Services Firm
7%
Computer Software Company
14%
Government
10%
Financial Services Firm
9%
Comms Service Provider
8%
Computer Software Company
19%
Comms Service Provider
9%
Government
7%
Financial Services Firm
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What is your experience regarding pricing and costs for IceWarp?
IceWarp was very cost-effective, offering services at a significantly lower cost than Google, which was appealing for...
What needs improvement with IceWarp?
The solution needs improvements in security, particularly regarding document management. Users currently have the rig...
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 ...
What do you like most about Microsoft Exchange?
The initial setup was straightforward and fast.
What is your experience regarding pricing and costs for Microsoft Exchange?
The licensing and pricing are quite costly, which can demotivate customers from opting for features and upgrades. How...
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.
What needs improvement with Zimbra Collaboration?
When it comes to administration tasks like configuring specific filters or group signatures, I have to dig into the c...
 

Also Known As

No data available
Exchange, MS Exchange
No data available
 

Overview

 

Sample Customers

Marriott, Toyota, Sony, Wendy's, Canon
Paderborn-Lippstadt Airport, Scitec Nutrition, British Airways, InnoGames, Osteology Foundation, Franz Haniel & Cie. GmbH, NTC Contracting
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.
850,671 professionals have used our research since 2012.