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 8.8, while Zimbra is ranked #6 with an average rating of 8.0. GFI holds a 4.0% mindshare in EA, compared to Zimbra’s 6.9% 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

1,647 Views
1,482 Comparison Views

62% willing to recommend

Zimbra Collaboration

Read 28 Zimbra Collaboration reviews

2,357 Views
2,263 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: February 2026).

Buyer's Guide

KerioConnect vs. Zimbra Collaboration

February 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 (6th)

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 February 2026, in the Email Applications category, the mindshare of KerioConnect is 4.0%, down from 4.9% compared to the previous year. The mindshare of Zimbra Collaboration is 6.9%, down from 9.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Applications Market Share Distribution
Product	Market Share (%)
Zimbra Collaboration	6.9%
KerioConnect	4.0%
Other	89.1%

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.

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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."

"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."

"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."

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

"The user interface is good."

"We use the solution as a mail server. It connects with Outlook and is used for calendaring and similar tasks."

"It's relatively simple to use."

"The most valuable features are security and privacy because you installed it on your server, within your company premises, not in the cloud."

More KerioConnect pros

"One of the premium features was customized rooms tailored to the collaboration needs. Many of the clients customize features such as organization logos and scanners."

"The most valuable feature of Zimbra Collaboration is email functionality."

"One of the most valuable features involves the solution's automatic backup, which I find to be pretty simple and straightforward, and obviates the need for additional software."

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

"The solution is easy to implement."

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

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

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

More Zimbra Collaboration pros

Cons

"Having a native Outlook map integration would make Kerio Connect better."

"KerioConnect is stable as long as you use a strong password."

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

"KerioConnect continues to improve with regular updates throughout the year. They must be added to the roadmap, which requires approval."

"Most of our clients use Outlook and Kerio Connect. Occasionally, Kerio can be a bit slow. They could make it faster to get onto the web interface without so much load time. It's just slow with Outlook, however, for some reason."

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

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

"I would like to see better support from their support team."

More KerioConnect cons

"It would be great if a group chat feature were created to allow for a team environment."

"The tool should improve its multi-cloud feature."

"The solution’s forums don't have much information or documentation on administration tasks."

"They should enhance its online meeting features."

"The product must be more customizable."

"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."

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

"The new patches are, at times, not so good, so we don't install them, causing the tool to be not so stable overall."

More Zimbra Collaboration cons

Pricing and Cost Advice

"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."

"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."

"The price of the solution is low."

"The solution is competitively priced."

"I use Zimbra Collaboration's community version. We may move to the enterprise version since prices are affordable."

"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 is less expensive than Microsoft Exchange. Zimbra works for small companies because it is not expensive. Zimbra Collaboration has more security tools than Microsoft Exchange. If you are choosing between Zimbra Collaboration and Microsoft Exchange, you have to take into account the cost of security tools with Microsoft Exchange. When you purchase Microsoft Exchange, you will also have to purchase tools for security, which adds to the cost. The migration from Zimbra Collaboration to another email solution is very simple and easy. Migration from Microsoft Exchange to another email solution is very difficult. Microsoft doesn't allow migration that easily. In fact, you have to pay for tools to do that. You have to buy some expensive tools to migrate."

"We do not pay for licenses to use this solution."

"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."

More Zimbra Collaboration pricing and cost advice

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Top Industries

By visitors reading reviews

Comms Service Provider

13%

Computer Software Company

11%

Manufacturing Company

Performing Arts

Computer Software Company

12%

Comms Service Provider

10%

Government

Manufacturing Company

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 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.

See all answers

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

The solution is competitively priced.

See all answers

Comparisons

Microsoft Exchange vs KerioConnect

Compared 38% of the time

IceWarp vs KerioConnect

Compared 11% of the time

Microsoft Exchange Online vs KerioConnect

Compared 8% of the time

Google Workspace vs KerioConnect

Compared 6% of the time

Open-Xchange vs KerioConnect

Compared 5% of the time

More KerioConnect Competitors

Open-Xchange vs Zimbra Collaboration

Compared 21% of the time

Microsoft Exchange vs Zimbra Collaboration

Compared 21% of the time

Microsoft Exchange Online vs Zimbra Collaboration

Compared 11% of the time

Google Workspace vs Zimbra Collaboration

Compared 8% of the time

IceWarp vs Zimbra Collaboration

Compared 7% of the time

More Zimbra Collaboration Competitors

Product Reports

Buyer's Guide

KerioConnect

January 2026

Download KerioConnect product report

Buyer's Guide

Zimbra Collaboration

January 2026

Download Zimbra Collaboration product report

Overview

Kerio Connect, a messaging and collaboration solution, meets the needs of small and mid-sized businesses while offering a robust feature lineup. Business users enjoy support for their favorite email client and easy web-based access. Kerio Connect is highly stable—so you can focus on business rather than unexpected downtime and recovery.

GFI

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

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

February 2026

Free Report: KerioConnect vs. Zimbra Collaboration

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