KerioConnect vs Zimbra Collaboration comparison

GFI and Zimbra are both solutions in the Email Applications category. GFI is ranked #9 with an average rating of 8.7, while Zimbra is ranked #6 with an average rating of 8.0. GFI holds a 4.0% mindshare in EA, compared to Zimbra’s 7.1% mindshare. Additionally, 62% of GFI users are willing to recommend the solution, compared to 96% of Zimbra users who would recommend it.

KerioConnect

Read 11 KerioConnect reviews

1,960 Views
1,666 Comparison Views

62% willing to recommend

Zimbra Collaboration

Read 28 Zimbra Collaboration reviews

2,780 Views
2,641 Comparison Views

96% willing to recommend

KerioConnect

Zimbra Collaboration

Comparison Buyer's Guide

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Executive SummaryUpdated on May 21, 2025

Zimbra Collaboration and KerioConnect are competing products in the realm of email and collaboration solutions. While KerioConnect may have a robust feature set that appeals to many, Zimbra Collaboration garners positive attention for its cost-effectiveness and customer service.

Features: Zimbra Collaboration stands out for integrated collaboration tools such as calendar management, file sharing, and robust security features. KerioConnect offers advanced filtering and email protection and flexible deployment options. Zimbra's strength lies in its seamless integration, while KerioConnect is praised for its comprehensive groupware setup.

Room for Improvement: Zimbra Collaboration could enhance its mobile app functionalities and offer more robust anti-spam solutions. The Zimbra interface could be more intuitive under high load. KerioConnect can improve by offering more integration capabilities with third-party services and simplifying its initial setup process. Also, KerioConnect's customer service response time could be quicker.

Ease of Deployment and Customer Service: Zimbra Collaboration offers swift cloud-based deployment minimizing downtime and reliable support services enhancing user experience. KerioConnect provides both cloud and on-premise options, giving businesses flexibility in infrastructure choices. Zimbra's customer service is noted for responsiveness, contrasting with KerioConnect's traditional support model.

Pricing and ROI: Zimbra Collaboration is noted for its affordable setup costs, offering substantial ROI through reduced maintenance expenses. Although KerioConnect has a higher initial cost, it potentially justifies this with customization capabilities catering to particular organizational needs, promising greater long-term value.

To learn more, read our detailed KerioConnect vs. Zimbra Collaboration Report (Updated: April 2026).

Buyer's Guide

KerioConnect vs. Zimbra Collaboration

April 2026

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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

9th

Average Rating

7.2

Reviews Sentiment

7.3

Number of Reviews

Ranking in other categories

Email Archiving (7th)

Zimbra Collaboration

Ranking in Email Applications

6th

Average Rating

8.0

Reviews Sentiment

7.3

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of May 2026, in the Email Applications category, the mindshare of KerioConnect is 4.0%, down from 4.7% compared to the previous year. The mindshare of Zimbra Collaboration is 7.1%, down from 8.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Applications Mindshare Distribution
Product	Mindshare (%)
Zimbra Collaboration	7.1%
KerioConnect	4.0%
Other	88.9%

Email Applications

Featured Reviews

Marcelino Mongcal

Senior Systems Tech/Admin at Samco Software Inc.

A seamless setup ensures smooth communication with comprehensive support

We remain a partner with Sophos and use XG S Firewalls without AWS implementation. We only use Sophos endpoint and Sophos Central. We host some clients on-premise while others we host remotely. The VPN connection is easy and proprietary, so it's not open to any other VPN clients. Communication with other mail servers is seamless. It can communicate with Gmail and Outlook without issues, provided the DNS settings are correct. We monitor our servers and security logs, implementing GeoIP blocking. We frequently block China and India IPs due to brute force attacks on our servers. We have extensive experience with KerioConnect. Backing up and maintaining it is straightforward compared to Microsoft Exchange, making it administrator-friendly. On a scale of 1-10, this solution rates an 8.

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Muhammad Talha Baig

Business Analyst and Associate Project Manager at SAMI Pharmaceuticals

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.

Read full review

Quotes from Members

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

Pros

"Kerio Connect is secure, flexible, and easy to control from the user interface."

"This solution is our SMB alternative to Exchange, installed for more than forty SMB customers in a Linux environment with all of the collaboration features."

"The most valuable features are its ease of use, excellent pricing, and it is platform agnostic."

"We have contacted technical support a handful of times and received some assistance."

"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."

"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."

"Backing up and maintaining it is straightforward compared to Microsoft Exchange, making it administrator-friendly."

"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."

More KerioConnect pros

"The web interface is powerful and easy to use."

"The stability is good and keeps getting better with each new update."

"Zimbra Collaboration is light to manage. It works on the Linux operating system, which is far better to manage than Microsoft Windows. Microsoft Exchange works only on the Windows server. We prefer working on the Linux server for security reasons and ease of management. Zimbra Collaboration also has some integrated tools for security. It some modules to fight malware. These modules are not very powerful but are still doing a great job. Microsoft Exchange doesn't have a basic module. You have to purchase a security solution and add it to the solution. The cost of Zimbra Collaboration is one more reason for liking it. It is also very simple to migrate from Zimbra Collaboration to another email solution."

"For a small company, Zimbra Collaboration is good because it is simple, inexpensive, and not very difficult to deploy."

"It is the best open source collaboration suite that I know, because it provides high availability and more performance than the other solutions."

"The Zimbra Collaboration's most valuable feature is web access."

"Premium features, such as auto discovery and archiving, mobile management and HSM, make life much easier."

"The backup and storage management features of Zimbra Collaboration are valuable."

More Zimbra Collaboration pros

Cons

"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"

"The search and archiving documentation capabilities need to be stronger."

"We cannot compete with them because they're fully integrated with their applications."

"It could be simpler to use and install, but I still wouldn't use it because there isn't a compelling use case."

"Most of our clients use Outlook and Kerio Connect. Occasionally, Kerio can be a bit slow."

"I don't particularly like this solution. I would not recommend this solution to others."

"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."

More KerioConnect cons

"There are some bugs we found that could be fixed."

"The solution could use more integration with third-party tools."

"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 antispam and antivirus features are hard to understand on mobile devices."

"I would like to see a Microsoft schedule function added."

"Zimbra should provide a desktop client. Right now, we are using a web browser for accessing our emails. There should also be a desktop client."

"We had a couple of issues with stability, but nothing that I couldn't work around or fix myself. Zimbra is a powerful product, but since VMware bought it, changes and bug fixes have been very slow in coming."

"The support was lacking in my experience. However, recently the support I received was good. Perhaps they have improved."

More Zimbra Collaboration cons

Pricing and Cost Advice

"KerioConnect has a first-time cost and yearly subscription. It is not expensive."

"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."

"The pricing is about $3 per mailbox per month."

"The price of Kerio Connect is better when comparing it to others solutions."

"The solution is competitively priced."

"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the price a four"

"The solution is not expensive compared to other products."

"Zimbra Collaboration is expensive, and there is no perpetual license option."

"We are using perpetual licenses. We have deployed it in our local data center, and we buy perpetual licenses on a per-user basis."

"When it comes to the licensing of Zimbra Collaboration, my license covers the servers and I find its terms to be much simpler than those of Microsoft Exchange."

"We pay yearly licenses for Zimbra Collaboration."

"There is an annual standard licensing fee to use Zimbra Collaboration and there is no other cost."

More Zimbra Collaboration pricing and cost advice

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Top Industries

By visitors reading reviews

Comms Service Provider

14%

Manufacturing Company

Computer Software Company

Performing Arts

Computer Software Company

10%

Comms Service Provider

10%

Outsourcing Company

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	10
Midsize Enterprise	2

By reviewers
Company Size	Count
Small Business	19
Midsize Enterprise	3
Large Enterprise	7

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.

See all answers

What is your experience regarding pricing and costs for KerioConnect?

The pricing is very easy to understand. As a partner, we have a monitoring system that informs us when subscriptions expire, allowing us to handle renewals. The pricing is very competitive.

See all answers

What needs improvement with KerioConnect?

Since KerioConnect is a setup and go solution, everything works on its own. The only administrative tasks required are keeping it up to date, monitoring security logs, and ensuring protection from ...

See all answers

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...

See all answers

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

The solution is competitively priced.

See all answers

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 configuration since there's nothing in the graphical or web interface. The soluti...

See all answers

Comparisons

Microsoft Exchange vs KerioConnect

Compared 25% of the time

IceWarp vs KerioConnect

Compared 11% of the time

Open-Xchange vs KerioConnect

Compared 9% of the time

ProtonMail vs KerioConnect

Compared 7% of the time

Microsoft Exchange Online vs KerioConnect

Compared 7% of the time

More KerioConnect Competitors

Open-Xchange vs Zimbra Collaboration

Compared 18% of the time

Microsoft Exchange vs Zimbra Collaboration

Compared 16% of the time

Google Workspace vs Zimbra Collaboration

Compared 10% of the time

Microsoft Exchange Online vs Zimbra Collaboration

Compared 10% of the time

IceWarp vs Zimbra Collaboration

Compared 6% of the time

More Zimbra Collaboration Competitors

Product Reports

Buyer's Guide

KerioConnect

May 2026

Download KerioConnect product report

Buyer's Guide

Zimbra Collaboration

April 2026

Download Zimbra Collaboration product report

Overview

KerioConnect delivers easy-to-use and secure email, calendar, and collaboration tools compatible with Office, Apple, and ActiveSync. Cost-effective and flexible, it suits on-premise installations, especially for SMBs seeking privacy and security.

KerioConnect offers a comprehensive email server experience with minimal resource needs and effective spam filtering. Compatible across platforms, it supports Outlook, enabling organizations to manage corporate communications efficiently. Its ability to host multiple domains makes it suitable for sectors like warehouse distribution and retail, with installation options that enhance security and privacy. However, faster Outlook integration, improved MS Teams and CRM system integration, and AI functionalities are sought after by users. Some demand a cloud version, Linux support, and better documentation. Still, KerioConnect remains a reliable choice for those needing on-premise capabilities.

What are KerioConnect's Key Features?

Ease of Use: Simplified interface for seamless navigation.
Robust Security: Advanced protection measures to safeguard data.
Spam Filtering: Efficiently reduces unwanted emails.
Platform Compatibility: Integrates with Office, Apple, and ActiveSync.
Log Analysis: Offers detailed insights for server management.
Multiple Domain Support: Manages diverse domains with ease.

What Benefits Should Users Expect?

Cost Efficiency: Lowers operational costs compared to alternatives.
Resource Minimization: Requires minimal system resources.
Deployment Flexibility: Allows tailored on-premise installations.
Enhanced Security: Provides privacy through internal hosting options.
Reliable Support: Access to reseller services from Sophos.

KerioConnect is widely utilized in SMBs across sectors like retail and warehouse distribution for its capability to handle multiple domains and integrate with Outlook for communication management. Resellers offer it as a dependable on-site email management solution, letting businesses maintain oversight and security control.

GFI

Zimbra Collaboration is a comprehensive tool for communication and collaboration, featuring easy account management and seamless integration capabilities with open-source customization. It's valued for premium functionalities like auto discovery and mobile synchronization, catering to small and medium-sized organizations.

Zimbra Collaboration provides essential features for business communication, including efficient account management via a centralized console and intuitive web interface. Designed for scalability and stability, it supports a range of functionalities from document sharing to video conferencing. Users benefit from its competitive pricing and open-source affordability. However, there's room for improvement in areas like backup, anti-spam, and mobile access, with a demand for better GUI, documentation, and language support. Zimbra's integration with third-party tools and strengthening video conferencing and storage management could enhance its appeal in various sectors.

What Are the Key Features of Zimbra Collaboration?

Centralized Console: Simplifies account management with an easy-to-use interface.
Open-Source Customization: Offers flexibility in adapting the platform to specific needs.
Seamless Integration: Allows smooth collaboration with existing tools and platforms.
Mobile Synchronization: Ensures access across devices for continuous productivity.
Anti-Spam Modules: Provides enhanced email security with built-in protections.

What Benefits Should Be Evaluated in Reviews?

Scalability: Grow with your organization's needs without compromising performance.
Affordability: Benefit from cost-effective features with competitive pricing.
Stability: Experience reliable and consistent performance across the platform.
Responsive Interface: Navigate effortlessly with a user-friendly design.

In industries like education and healthcare, Zimbra Collaboration implements effective email and collaboration solutions, offering robust security and seamless integration. It facilitates communication for organizations requiring reliable webmail support for numerous accounts, ensuring consistent performance and affordable scalability.

Zimbra

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

Buyer's Guide

KerioConnect vs. Zimbra Collaboration

April 2026

Free Report: KerioConnect vs. Zimbra Collaboration

Find out what your peers are saying about KerioConnect vs. Zimbra Collaboration and other solutions. Updated: April 2026.

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