Try our new research platform with insights from 80,000+ expert users

KerioConnect vs Microsoft Exchange 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
9th
Average Rating
7.2
Reviews Sentiment
7.3
Number of Reviews
11
Ranking in other categories
Email Archiving (6th)
Microsoft Exchange
Ranking in Email Applications
3rd
Average Rating
8.4
Reviews Sentiment
6.6
Number of Reviews
94
Ranking in other categories
Wireless Email (2nd)
 

Mindshare comparison

As of October 2025, in the Email Applications category, the mindshare of KerioConnect is 4.4%, up from 4.4% compared to the previous year. The mindshare of Microsoft Exchange is 11.3%, down from 11.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Applications Market Share Distribution
ProductMarket Share (%)
Microsoft Exchange11.3%
KerioConnect4.4%
Other84.3%
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.
ImranShaikh - PeerSpot reviewer
Offers several valuable features including conditional access, identity and access management, and scalability of mailboxes
We use Microsoft Exchange primarily for mailing purposes, both internal and external. We integrate it with other Microsoft tools like Outlook, Word document collaboration, Teams, SharePoint, and more The integration of Microsoft Exchange with other tools allows for seamless collaboration and…

Quotes from Members

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

Pros

"The most valuable features are its ease of use, excellent pricing, and it is platform agnostic."
"The user interface is good."
"Backing up and maintaining it is straightforward compared to Microsoft Exchange, making it administrator-friendly."
"It's relatively simple to use."
"We have contacted technical support a handful of times and received some assistance."
"The most valuable features are security and privacy because you installed it on your server, within your company premises, not in the cloud."
"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."
"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."
"The most valuable feature of Microsoft Exchange is the collaboration tools."
"It is easy to use and we can allow many users because now our users are scattered They over a wide area. We can use it from anywhere. That is the main benefit for us."
"I like the logistics and the Microsoft protocol of reaching Outlook anywhere."
"Microsoft Exchange is a user-friendly product that is easy to manage and configure."
"The technical support is fine."
"The technical support services are good."
"I find the Outlook client very valuable. It allows me to connect to the Exchange Server and send and receive emails easily. The graphical interface is user-friendly and has a good look and feel."
"The most valuable feature of Microsoft Exchange is its ease of use."
 

Cons

"You cannot integrate with other services like Google Docs, Google Assistant, Google Calendar, etc."
"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."
"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. 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."
"KerioConnect is stable as long as you use a strong password."
"I would like to see better support from their support team."
"The search and archiving documentation capabilities need to be stronger."
"We cannot compete with them because they're fully integrated with their applications."
"Load balancing is lacking."
"From a security point of view, Microsoft should enhance the new features. Technical support could also be better."
"They could continue to improve the consolidation and integration of mailbox services to make them more flexible, easier to deploy, and more manageable."
"Microsoft needs to make some modifications to meet the current needs of the environment. For example, they need to add more cell service features because people work from home during the pandemic, and certain elements should be available as a mobile service."
"Microsoft Exchange could improve by being more secure. We are always looking to have more security."
"In terms of what should be improved, they should probably move to a cloud option like Office 365. We would like to get this functionality without the need to deploy complex hardware and software solutions. This should be the next thing, making Exchange more related to Office products, which are more cloud-oriented, less on-premise or desktop-oriented solutions, like the direction Google is strongly moving towards."
"It is important to have the updated version for scalability."
"I would like to see Microsoft Exchange improve their documentation."
 

Pricing and Cost Advice

"KerioConnect has a first-time cost and yearly subscription. It is not expensive."
"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."
"The price of Kerio Connect is better when comparing it to others solutions."
"The solution's pricing is fine...I do think the tool offers value for money."
"The platform has a reasonable price."
"The price of Microsoft Exchange is reasonable."
"It would be nice if it used less resources to run on-premise."
"We can get Exchange in the cloud along with the Microsoft 365 license."
"It is not expensive."
"We pay for the license annually."
"The solution is expensive to maintain because it requires frequent updates and ongoing server maintenance."
report
Use our free recommendation engine to learn which Email Applications solutions are best for your needs.
872,706 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Comms Service Provider
13%
Computer Software Company
12%
Manufacturing Company
10%
Retailer
7%
Computer Software Company
12%
Manufacturing Company
9%
Comms Service Provider
9%
Government
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise2
By reviewers
Company SizeCount
Small Business41
Midsize Enterprise27
Large Enterprise35
 

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?
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.
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 ...
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 Microsoft Exchange?
The initial setup was straightforward and fast.
What is your experience regarding pricing and costs for Microsoft Exchange?
Microsoft Exchange is costly, and its licensing model can be expensive over time as more users require licenses.
 

Also Known As

No data available
Exchange, MS Exchange
 

Overview

 

Sample Customers

Southern Tier Brewing Company, Innotta, Baustoff + Metall, Hamifleurs, Chanson TV, Ryman Stationery
Paderborn-Lippstadt Airport, Scitec Nutrition, British Airways, InnoGames, Osteology Foundation, Franz Haniel & Cie. GmbH, NTC Contracting
Find out what your peers are saying about KerioConnect vs. Microsoft Exchange and other solutions. Updated: September 2025.
872,706 professionals have used our research since 2012.