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KerioConnect vs Mimecast Advanced Email Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jun 2, 2026

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 Archiving
7th
Average Rating
7.2
Reviews Sentiment
7.3
Number of Reviews
11
Ranking in other categories
Email Applications (9th)
Mimecast Advanced Email Sec...
Ranking in Email Archiving
2nd
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
44
Ranking in other categories
Secure Web Gateways (SWG) (10th), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)
 

Mindshare comparison

As of July 2026, in the Email Archiving category, the mindshare of KerioConnect is 3.2%, up from 0.9% compared to the previous year. The mindshare of Mimecast Advanced Email Security is 14.2%, down from 22.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Archiving Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security14.2%
KerioConnect3.2%
Other82.6%
Email Archiving
 

Featured Reviews

MM
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.
Avinash Mishra - PeerSpot reviewer
Manager - EUC at Finthrive
Advanced email filtering has blocked massive spam volumes and prevents unauthorized data leaks
Improvements for Mimecast Advanced Email Security include enhancing the user interface and accessibility, particularly regarding admin capabilities to add or modify user accounts. Streamlining this could improve overall usability and security management for users. Reporting is another area needing improvement in Mimecast Advanced Email Security, as the reports provided are not very easy to decipher. With artificial intelligence being integrated into various tools including Mimecast Advanced Email Security, I believe there is potential to enhance functionality, enabling users to ask specific questions and retrieve concise answers instead of overwhelming data. I choose a nine for Mimecast Advanced Email Security because improvements such as better user interface and artificial intelligence integration features would greatly enhance its usability. While no tool is perfect, these adjustments could greatly elevate Mimecast Advanced Email Security's capabilities.

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."
"We use the solution as a mail server. It connects with Outlook and is used for calendaring and similar tasks."
"Kerio Connect is secure, flexible, and easy to control from the user interface."
"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."
"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."
"The most valuable features are security and privacy because you installed it on your server, within your company premises, not in the cloud."
"As long as the operating is stable, the Kerio connect will be very stable as well, so we don't have any problem with it."
"Backing up and maintaining it is straightforward compared to Microsoft Exchange, making it administrator-friendly."
"The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature."
"What I like about the integration is that it is directly into Microsoft 365, users can use their Microsoft 365 credentials to log into the portal and access their mail."
"The reviewer gave Mimecast Email Security a rating of 10 out of 10."
"It's good, it keeps the spam out, and it does a really good job at not allowing threats through."
"We like Mimecast's spam filtering. The email signature feature is also a big plus for our users."
"The most valuable feature is the DMARC Analyzer."
"Mimecast has some good support services in place."
"The solution is scalable."
 

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"
"You cannot integrate with other services like Google Docs, Google Assistant, Google Calendar, etc."
"I would like to see better support from their support team."
"This is just a cost, it's not something that's driving our business forward; it's just foundational."
"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."
"KerioConnect is stable as long as you use a strong password."
"Most of our clients use Outlook and Kerio Connect. Occasionally, Kerio can be a bit slow."
"Its pricing can be improved. It is a bit expensive."
"The filtering needs more flexibility."
"The product's interface could be improved to be more user-friendly."
"They should improve the cookies management feature."
"The solution should include more AI features instead of Mimecast's more general static configuration tooling."
"The differentiation between bulk spam mail and campaign-related mail could be improved."
"I did have a problem with Mimecast. That is why I was looking for an alternative solution because their sender IP address gets poorly rated by Microsoft."
"They could provide a unified licensing model, including all the security features."
 

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 customers can select the license packages as per their requirements."
"The product has good pricing in terms of return on investment."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"Its price is in the middle range. It is a structured licensing model where there are various components that you can add or choose to add or not."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a ten."
"It is a bit expensive."
"It's an expensive solution."
"Two subscription options are currently offered: monthly and yearly. My suggestion is to opt for the yearly subscription as it can give some discount. The pricing isn't high as other cloud solutions are pricier than Microsoft's offerings."
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Top Industries

By visitors reading reviews
Comms Service Provider
13%
Manufacturing Company
10%
Construction Company
9%
Performing Arts
7%
Computer Software Company
11%
Financial Services Firm
9%
Construction Company
8%
Outsourcing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise2
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise12
Large Enterprise18
 

Questions from the Community

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 ...
What is your primary use case for KerioConnect?
Small medium-sized businesses are our primary focus, particularly in warehouse distribution and retail sectors. We are a reseller and purchase directly from Sophos.
What needs improvement with Mimecast Email Security with Targeted Threat Protection?
There is room for improvement since new threats are emerging. Considering the availability of new features would be worthwhile. Mimecast Email Security is somewhat expensive compared to the competi...
 

Also Known As

No data available
Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Email and Collaboration Threat Protection
 

Overview

 

Sample Customers

Southern Tier Brewing Company, Innotta, Baustoff + Metall, Hamifleurs, Chanson TV, Ryman Stationery
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Find out what your peers are saying about KerioConnect vs. Mimecast Advanced Email Security and other solutions. Updated: June 2026.
904,836 professionals have used our research since 2012.