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KerioConnect vs Mimecast Advanced Email Security comparison

GFI and Mimecast are both solutions in the Email Archiving category. GFI is ranked #7 with an average rating of 10.0, while Mimecast is ranked #2 with an average rating of 8.3. GFI holds a 2.8% mindshare in EA, compared to Mimecast’s 14.5% mindshare. Additionally, 62% of GFI users are willing to recommend the solution, compared to 92% of Mimecast users who would recommend it.
KerioConnect
Read 11 KerioConnect reviews
  • 2,026 Views
  • 324 Comparison Views
62% willing to recommend
Mimecast Advanced Email Sec...
Read 40 Mimecast Advanced Email Security reviews
  • 8,859 Views
  • 1,595 Comparison Views
92% willing to recommend
 

Comparison Buyer's Guide

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Executive SummaryUpdated on Jun 2, 2026

KerioConnect and Mimecast Advanced Email Security compete in the email security domain. While KerioConnect stands out for its affordability and customer support, Mimecast Advanced Email Security has the upper hand due to its comprehensive features and superior threat intelligence.

Features: KerioConnect provides integrated email, calendaring, and contacts for small and medium-sized businesses. It supports ActiveSync, has excellent spam and antivirus filtering, and allows log file analysis and shared folders. Mimecast Advanced Email Security offers comprehensive threat protection, advanced filtering, and email continuity. Its features include threat remediation, URL protection, and secure messaging.

Room for Improvement: KerioConnect could enhance scalability and offer more cloud-based features. Optimization of its mobile interface and extension of third-party app integration could improve user experience. Mimecast Advanced Email Security might simplify deployment, streamline its complex features, and enhance platform integration. Reducing the learning curve for new users would benefit user adoption.

Ease of Deployment and Customer Service: KerioConnect offers a straightforward deployment process and reliable customer service, providing a hassle-free setup. Mimecast Advanced Email Security, more complex to deploy due to its extensive features, excels in customer service and support documentation, offering a detailed support infrastructure.

Pricing and ROI: KerioConnect has a lower initial setup cost, making it attractive for budget-conscious businesses and providing a quick ROI. Mimecast Advanced Email Security, although more expensive, justifies the investment with long-term security benefits crucial for larger organizations requiring comprehensive protection.

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To learn more, read our detailed KerioConnect vs. Mimecast Advanced Email Security Report (Updated: June 2026).
Buyer's Guide
KerioConnect vs. Mimecast Advanced Email Security
June 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 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
6.0
Number of Reviews
40
Ranking in other categories
Secure Web Gateways (SWG) (15th), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)
 

Mindshare comparison

As of June 2026, in the Email Archiving category, the mindshare of KerioConnect is 2.8%, up from 0.9% compared to the previous year. The mindshare of Mimecast Advanced Email Security is 14.5%, down from 23.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Archiving Mindshare Distribution
ProductMindshare (%)
Mimecast Email and Collaboration Threat Protection14.5%
KerioConnect2.8%
Other82.7%
Email Archiving
 

Featured Reviews

MM
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.
Read full review
Ravishankar KumarPatel - PeerSpot reviewer
Ravishankar KumarPatel
Solution Architect Cybersecurity at Microland Limited
Email defenses have reduced phishing risk and support strong compliance and user awareness
The improvement needed is not necessarily in the product itself, but rather around how other organizations have evolved. The DLP discussion is no longer limited to email; it has gone to border level with companies like Zscaler, Netskope, and Palo Alto giving the complete full-stack SASE setup. When somebody has a SASE setup, then Mimecast Advanced Email Security DLP might not even be needed at a point in time. Mimecast Advanced Email Security needs to improve in this area because they are only focusing on a particular set of problems which is on email and human risk, whereas companies that need a slightly bigger picture will look elsewhere. The second thing is when you buy an XDR provider, they give you a complete holistic story around it, showing what has happened, which email somebody has clicked on, whether there have been any changes, and whether there is any network activity. You get a holistic picture. When pushing Mimecast Advanced Email Security to end customers, people are more often saying that they would rather buy XDR from another provider because the story when an analyst sees is complete in terms of what they see, whereas they only get an email story from Mimecast Advanced Email Security. Mimecast Advanced Email Security has to improve there. Companies like Abnormal AI cover more on UEBA and user behavior, and there are many things for Mimecast Advanced Email Security to improve in this area as well. It is less of a technology issue; they are doing very well on email. The conversation for them to have is on how to get into a broader level or how to get a tie-up to become a broader supplier. At least from a service provider landscape, I can say that.
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

"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."
"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."
"Backing up and maintaining it is straightforward compared to Microsoft Exchange, making it administrator-friendly."
"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 its ease of use, excellent pricing, and it is platform agnostic."
"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."
"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."
More KerioConnect pros
"Mimecast is a brilliant product; it works very well, I have very seldomly, if ever, had any problems with it, and it does exactly what it promises to do."
"We're now certain business-critical mail is perfectly protected in multiple ways."
"The platform's most valuable features are journaling and email archiving, effectively stopping phishing attacks."
"The most valuable feature of Mimecast Mailbox Continuity is real-time alerts."
"Mimecast Mailbox Continuity helps companies continue to move."
"The interface of this solution is very easy to navigate and user-friendly. There is no delivery in email and other communications, making it reliable. The configuration is relatively easy."
"Due to our specialized use case, that HIPAA dictionary really comes in handy."
"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."
More Mimecast Advanced Email Security pros
 

Cons

"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."
"Most of our clients use Outlook and Kerio Connect. Occasionally, Kerio can be a bit slow."
"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."
"We cannot compete with them because they're fully integrated with their applications."
"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"
More KerioConnect cons
"We have subscribed to an archival service, and yet, when we have to get our data out, we have to pay a fee to get our own data. They charge an extraction fee."
"The price could be better, it should be reduced."
"The interface isn't the best. How everything works on the back end is confusing."
"Their support should be improved. They are notorious for sending you to knowledge-based articles rather than actually talking to you about the problem you're reporting."
"Mimecast needs to reduce the number of false positive emails; a big pain point for us."
"The solution should include more AI features instead of Mimecast's more general static configuration tooling."
"Mimecast Advanced Email Security needs to improve in this area because they are only focusing on a particular set of problems which is on email and human risk, whereas companies that need a slightly bigger picture will look elsewhere."
"The installation is not so straightforward."
More Mimecast Advanced Email Security 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 price of Kerio Connect is better when comparing it to others solutions."
"The pricing is about $3 per mailbox per month."
"KerioConnect has a first-time cost and yearly subscription. It is not expensive."
"The product has good pricing in terms of return on investment."
"I'm always going to say the price needs to be lower, but it's reasonable."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"It's an expensive solution."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a ten."
"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."
"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."
"Compared to the other products in the market, it is neither cheap but nor very expensive. I would rate it somewhere in the middle, 5 out of 10."
More Mimecast Advanced Email Security pricing and cost advice
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Top Industries

By visitors reading reviews
Comms Service Provider
14%
Manufacturing Company
10%
Construction Company
9%
Computer Software Company
7%
Computer Software Company
11%
Financial Services Firm
9%
Construction Company
8%
Comms Service Provider
6%
 

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 Enterprise11
Large Enterprise14
 

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.
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
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.
See all answers
What is your experience regarding pricing and costs for Mimecast Email Security with Targeted Threat Protection?
Do you know anything about the pricing and cost of the Mimecast Email Security?
See all answers
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...
See all answers
What is your primary use case for Mimecast Email Security with Targeted Threat Protection?
I have been working with Mimecast Email Security.
See all answers
 

Comparisons

Microsoft Exchange vs KerioConnect Logo
Microsoft Exchange vs KerioConnect
Compared 19% of the time
Zimbra Collaboration vs KerioConnect Logo
Zimbra Collaboration vs KerioConnect
Compared 13% of the time
IceWarp vs KerioConnect Logo
IceWarp vs KerioConnect
Compared 10% of the time
Open-Xchange vs KerioConnect Logo
Open-Xchange vs KerioConnect
Compared 9% of the time
Superhuman vs KerioConnect Logo
Superhuman vs KerioConnect
Compared 5% of the time
More KerioConnect Competitors
Check Point Email Security (formerly Harmony Email & Collaboration) vs Mimecast Advanced Email Security Logo
Check Point Email Security (formerly Harmony Email & Collaboration) vs Mimecast Advanced Email Security
Compared 17% of the time
Proofpoint Email Protection vs Mimecast Advanced Email Security Logo
Proofpoint Email Protection vs Mimecast Advanced Email Security
Compared 10% of the time
Microsoft Defender for Office 365 vs Mimecast Advanced Email Security Logo
Microsoft Defender for Office 365 vs Mimecast Advanced Email Security
Compared 8% of the time
Barracuda Email Protection vs Mimecast Advanced Email Security Logo
Barracuda Email Protection vs Mimecast Advanced Email Security
Compared 6% of the time
Barracuda Email Security Gateway vs Mimecast Advanced Email Security Logo
Barracuda Email Security Gateway vs Mimecast Advanced Email Security
Compared 4% of the time
More Mimecast Advanced Email Security Competitors
 

Product Reports

Buyer's Guide
KerioConnect
June 2026
KerioConnect reportDownload KerioConnect product report
Buyer's Guide
Mimecast Advanced Email Security
May 2026
Mimecast Advanced Email Security reportDownload Mimecast Advanced Email Security product report
 

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

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

Mimecast Advanced Email Security offers advanced features like sandboxing, email archiving, and phishing protection. It's known for integration with Microsoft 365 and user-friendly admin management, making it a robust choice for secure communications.

Focused on safeguarding emails, Mimecast Advanced Email Security integrates seamlessly with Microsoft 365, providing features such as sandboxing, spam filtering, and email archiving. It delivers comprehensive protection against phishing, identity threats, and impersonation attempts. Administrators benefit from the ability to monitor external communications and customize configurations, enhancing email security. Users appreciate the intuitive admin console and responsive support team. Although it faces challenges in threat detection rates and administration complexity, its capabilities in email monitoring, spam filtering, and URL inspection remain valued by enterprises seeking reliable email security that supports compliance needs.

What key features should users explore?

  • Sandboxing: Analyzes attachments in a secure environment to detect threats.
  • Email Archiving: Provides secure long-term storage of emails for compliance.
  • Spam Filtering: Prevents unsolicited emails from clogging the inbox.
  • URL Inspection: Checks links in emails for malicious content.
  • Phishing Protection: Guards against deceptive tactics to protect sensitive data.

What benefits can impact ROI?

  • Regulatory Compliance: Facilitates adherence to standards such as HIPAA.
  • Integration: Enhances existing systems with seamless Microsoft 365 integration.
  • Support: Offers a responsive support team to resolve issues promptly.
  • Email Security: Improves threat prevention with effective spam and phishing protections.

Mimecast Advanced Email Security is implemented across industries to protect against email threats like phishing, spam, and malicious attachments. It serves as both a gateway and an archiving tool, supporting compliance in healthcare and finance by offering features like URL protection and data loss prevention. Enterprises leverage its capabilities to secure inbound and outbound communications effectively.

Mimecast
 

Sample Customers

Southern Tier Brewing Company, Innotta, Baustoff + Metall, Hamifleurs, Chanson TV, Ryman Stationery
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Buyer's Guide
KerioConnect vs. Mimecast Advanced Email Security
June 2026
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