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KerioConnect vs Zimbra Collaboration comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on May 21, 2025

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

KerioConnect
Ranking in Email Applications
10th
Average Rating
6.8
Reviews Sentiment
7.1
Number of Reviews
10
Ranking in other categories
Email Archiving (8th)
Zimbra Collaboration
Ranking in Email Applications
5th
Average Rating
8.0
Reviews Sentiment
7.3
Number of Reviews
29
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2025, in the Email Applications category, the mindshare of KerioConnect is 4.5%, up from 4.1% compared to the previous year. The mindshare of Zimbra Collaboration is 8.5%, down from 9.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Applications
 

Featured Reviews

David Bloomer - PeerSpot reviewer
Lightweight, simple, and robust; easy to maintain and doesn't require a lot of system resources to run
Kerio Connect does as advertised, so there are no real issues with the product itself. It's developed regularly, so there are constant updates. Possibly, the support and development have lessened since they've sold the company, but as far as the product itself is concerned, there isn't anything that I would suggest needs improvement. If I'm being picky, Kerio Connect uses a proprietary, mappy atom for Outlook, and it would be nice if they used a native mappy connection instead, but that's the only additional feature that I would like to see in its next release. If they have native Outlook map integration, that would be great, but other than that, it's got all the functions that I think a mail server should have.
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

"We have contacted technical support a handful of times and received some assistance."
"The most valuable features are its ease of use, excellent pricing, and it is platform agnostic."
"The user interface is good."
"KerioConnect has integration with 365. We can use Outlook, which has its client and can be used with Apple devices. It integrates with the App Store and Microsoft Office. It has a smart router. The spam filtering and antivirus are good."
"What I like most about Kerio Connect is that it supports ActiveSync, and that is its most critical feature. The solution is also a nice, simple, robust, and stable mail server."
"It's relatively simple to use."
"Kerio Connect is secure, flexible, and easy to control from the user interface. It has many security features able to be controlled from one place, such as anti-spam. I have found it very convenient. Additionally, you can analyze log files and share folders which is helpful."
"We use the solution as a mail server. It connects with Outlook and is used for calendaring and similar tasks."
"The most valuable feature of Zimbra Collaboration is email functionality."
"The most valuable feature of Zimbra Collaboration is the cost."
"The web interface is powerful and easy to use."
"The Zimbra Collaboration's most valuable feature is web access."
"Zimbra Collaboration has a good web interface."
"Zimbra Collaboration has integrated a lot of their party tools and they have good documentation available."
"The product is easy to set up."
"Zimbra Collaboration's sharing features are most valuable."
 

Cons

"KerioConnect continues to improve with regular updates throughout the year. They must be added to the roadmap, which requires approval."
"The solution could improve the redundancy because we only have one copy of the Kerio Connect server on our hardware. The next step for us is to move to the cloud and if Kerio does not have a cloud version available they should release one"
"Having a native Outlook map integration would make Kerio Connect better."
"The search and archiving documentation capabilities need to be stronger."
"KerioConnect is stable as long as you use a strong password."
"You cannot integrate with other services like Google Docs, Google Assistant, Google Calendar, etc."
"It could be simpler to use and install, but I still wouldn't use it because there isn't a compelling use case."
"We are considering switching to Microsoft Exchange. One reason is that it doesn't improve our workflow and doesn't integrate well with Microsoft 365 applications."
"File sharing permissions with Nextcloud integration need improvement."
"In the next release, Zimbra Collaboration should include a security feature to allow access for mobile device administrators."
"The installation is not straightforward, it can take two days for the full implementation."
"It would be great if a group chat feature were created to allow for a team environment."
"It is good and competent, but you have to pay for video and group chat features."
"The new patches are, at times, not so good, so we don't install them, causing the tool to be not so stable overall."
"There are some security issues."
"The solution could use more integration with third-party tools."
 

Pricing and Cost Advice

"The pricing is about $3 per mailbox per month."
"The solution's pricing depends on how long you plan to keep it because you pay on a per-year basis. You might have a one-time setup cost for something like Microsoft Exchange or a Linux mail server. I'd say this solution is expensive on a per-year basis, almost 2000-3000 dollars annually. It doesn't seem to pay off yet, so we're considering switching to another product."
"KerioConnect has a first-time cost and yearly subscription. It is not expensive."
"The price of Kerio Connect is better when comparing it to others solutions."
"We pay yearly licenses for Zimbra Collaboration."
"The price of the solution is low."
"We are using perpetual licenses. We have deployed it in our local data center, and we buy perpetual licenses on a per-user basis."
"Zimbra Collaboration offers a good price-to-feature ratio."
"I use Zimbra Collaboration's community version. We may move to the enterprise version since prices are affordable."
"The solution is not expensive compared to other products."
"If you choose the network edition, it is a little pricier. They have the open-source edition too which is only community supported."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the price a four"
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Comms Service Provider
11%
Manufacturing Company
8%
Retailer
6%
Computer Software Company
15%
Comms Service Provider
9%
Government
9%
Energy/Utilities Company
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about KerioConnect?
The most valuable features are security and privacy because you installed it on your server, within your company premises, not in the cloud.
What is your experience regarding pricing and costs for KerioConnect?
KerioConnect has a first-time cost and yearly subscription. It is not expensive.
What needs improvement with KerioConnect?
KerioConnect continues to improve with regular updates throughout the year. They must be added to the roadmap, which requires approval. In larger organizations, the server's capabilities and the da...
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...
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.
 

Overview

 

Sample Customers

Southern Tier Brewing Company, Innotta, Baustoff + Metall, Hamifleurs, Chanson TV, Ryman Stationery
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 KerioConnect vs. Zimbra Collaboration and other solutions. Updated: July 2025.
865,295 professionals have used our research since 2012.