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KerioConnect vs Microsoft Exchange Online 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:
 

Categories and Ranking

KerioConnect
Ranking in Email Applications
8th
Average Rating
6.8
Reviews Sentiment
7.9
Number of Reviews
10
Ranking in other categories
Email Archiving (7th)
Microsoft Exchange Online
Ranking in Email Applications
2nd
Average Rating
8.6
Reviews Sentiment
7.5
Number of Reviews
89
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of May 2025, in the Email Applications category, the mindshare of KerioConnect is 4.7%, up from 3.9% compared to the previous year. The mindshare of Microsoft Exchange Online is 14.1%, down from 15.5% 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.
NancyHartman - PeerSpot reviewer
Effective collaboration achieved with versatile features and good customer service
There are always improvements needed. My personal issue with using OfficeSuite and the Exchange Server is that one has to cobble together a whole bunch of different applications. Therefore, a lot of scripting and programming knowledge is necessary. I am not an IT person; I am an educator, a trainer, a user. I want to get the work done. However, I find that the Exchange Server and possibly the way our company has set up access permissions require extensive programming knowledge. It might take six to eight weeks to get a programmer's time to build something, whereas I can use something like Smartsheet that will do everything I want without needing a programmer. Smartsheet is more end-user friendly compared to a Microsoft product. Microsoft believes an expert IT person should manage everything, however, I want to manage things on my own in a simplified way. That is not easy using the Exchange Server or Microsoft Office. It is not end-user friendly for development, and a programmer is needed. Once set up, using them as an end-user is fine. I find that the automations are not robust, and the FedRAMP systems are not robust. I have a few issues with Exchange and Office, but there's nothing I can do about it.

Quotes from Members

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

Pros

"We use the solution as a mail server. It connects with Outlook and is used for calendaring and similar tasks."
"The most valuable features are security and privacy because you installed it on your server, within your company premises, not in the cloud."
"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."
"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."
"The solution is easy to maintain, unlike Exchange. It's easy to create multiple domains and back up and restore if needed. It also has good security features like anti-spam and antivirus."
"Technical support is helpful."
"Exchange Online's best feature is its webmail platform."
"The benefits are widespread and effective communication. We use Microsoft Teams for meetings within and outside our organization. Additionally, Teams can be used for chat, allowing us to track communication and see user activity"
"There are many valuable features such as email, calendar, and the ability to share your calendar and documents with coworkers. Knowing that the emails go through the EOP filtering service is nice as well."
"I would rate Exchange Online's stability nine out of ten."
"The most valuable feature of Microsoft Exchange Online is if you have people that are geographically distributed from each other is good. For example, if you have people in the United States, Europe, Africa, Asia, and Australia, having an online solution works best because then you can reach the scale of the data centers that are available by Microsoft. Additionally, if you're only going to have two to three people using the solution the cost is a lot less than having an onsite server and licensing. It is highly beneficial in these areas."
"Exchange Online plays a significant role in our business. It controls all our emails, so we'd be in a lot of trouble if we didn't have that. It's an essential product."
"I have not had issues with stability of the product."
 

Cons

"The search and archiving documentation capabilities need to be stronger."
"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."
"KerioConnect is stable as long as you use a strong password."
"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"
"It could be simpler to use and install, but I still wouldn't use it because there isn't a compelling use case."
"You cannot integrate with other services like Google Docs, Google Assistant, Google Calendar, etc."
"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."
"I would like to see better support from their support team."
"The solution could be a bit cheaper."
"The support could improve their response time and sometimes the phone lines are not clear because of static or noise. However, the agents are knowledgeable and very helpful."
"From an IT perspective, we need clearer documentation to understand the product’s configuration process."
"The product needs to embed AI for intelligent searches and analytics."
"Technical support can be improved by shortening the response time and increasing their knowledge."
"We'd like to see more integration with other platforms."
"I would prefer an anti-malware functionality in at least the basic version."
"The demo version we were provided had issues with emails bouncing or being delayed."
 

Pricing and Cost Advice

"The price of Kerio Connect is better when comparing it to others solutions."
"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 pricing is about $3 per mailbox per month."
"The product is expensive and has an annual subscription."
"We pay per user per year for the cluster with over a thousand users."
"The costs of this platform vary based on subscriptions, but it is generally reasonable."
"We have yearly licensing costs."
"Microsoft Exchange Online is too expensive."
"I think that the price is a little high, especially considering that Google have a similar, free email solution."
"The licensing cost increased at least 15 to 20 percent recently and it would be helpful for them to be reduced."
"Our organization pays for a corporate license to use the solution."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Comms Service Provider
13%
Government
8%
Manufacturing Company
6%
Computer Software Company
12%
Financial Services Firm
7%
Comms Service Provider
7%
Government
7%
 

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...
What do you like most about Microsoft Exchange Online?
The benefits are widespread and effective communication. We use Microsoft Teams for meetings within and outside our organization. Additionally, Teams can be used for chat, allowing us to track comm...
What is your experience regarding pricing and costs for Microsoft Exchange Online?
The pricing for Microsoft Exchange Online is quite reasonable, in my opinion. Many licensing options are available so that we can choose based on the customer's needs. For example, if a customer on...
What needs improvement with Microsoft Exchange Online?
There are always improvements needed. My personal issue with using OfficeSuite and the Exchange Server is that one has to cobble together a whole bunch of different applications. Therefore, a lot o...
 

Also Known As

No data available
Exchange Online, Exchange Online Plan 1, Exchange Online Plan 2, MS Exchange Online
 

Overview

 

Sample Customers

Southern Tier Brewing Company, Innotta, Baustoff + Metall, Hamifleurs, Chanson TV, Ryman Stationery
Bank Alfalah Ltd., Paderborn-Lippstadt Airport, Blue Star Infotech, Scitec Nutrition, Resolution Films, British Airways, Empire Cinemas, InnoGames
Find out what your peers are saying about KerioConnect vs. Microsoft Exchange Online and other solutions. Updated: April 2025.
849,686 professionals have used our research since 2012.