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 8.5. GFI holds a 3.2% mindshare in EA, compared to Mimecast’s 14.2% mindshare. Additionally, 62% of GFI users are willing to recommend the solution, compared to 90% of Mimecast users who would recommend it.

KerioConnect

Read 11 KerioConnect reviews

2,095 Views
398 Comparison Views

62% willing to recommend

Mimecast Advanced Email Sec...

Read 44 Mimecast Advanced Email Security reviews

9,473 Views
1,705 Comparison Views

90% willing to recommend

KerioConnect

Mimecast Advanced Email Sec...

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.

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

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

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
Product	Mindshare (%)
Mimecast Advanced Email Security	14.2%
KerioConnect	3.2%
Other	82.6%

Email Archiving

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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Avinash Mishra

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.

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

"We have contacted technical support a handful of times and received some assistance."

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

"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."

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

"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."

"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."

"Kerio Connect is secure, flexible, and easy to control from the user interface."

More KerioConnect pros

"I have always found Mimecast to be very responsive; for example, if we see something come through, they address it and it helps to sort out the issues."

"The positive impact of Mimecast Advanced Email Security on our organization is evident in how it has drastically reduced spam emails and improved our data security."

"The platform's most valuable features are journaling and email archiving, effectively stopping phishing attacks."

"We're now certain business-critical mail is perfectly protected in multiple ways."

"We like Mimecast's spam filtering. The email signature feature is also a big plus for our users."

"The product's most valuable features are impersonation protection and phishing countermeasures."

"Mimecast is pretty good, even if you're on Office 365."

"My advice for others looking into using Mimecast Advanced Email Security is that they can strengthen their security very well if they choose to go with it."

More Mimecast Advanced Email Security pros

Cons

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

"You cannot integrate with other services like Google Docs, Google Assistant, Google Calendar, etc."

"This is just a cost, it's not something that's driving our business forward; it's just foundational."

"Most of our clients use Outlook and Kerio Connect. Occasionally, Kerio can be a bit slow."

"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."

More KerioConnect cons

"I'd like to have better support from the product in the future."

"Mimecast need to ensure that the body text format is correctly handled and that images are properly embedded in the body text."

"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."

"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."

"The differentiation between bulk spam mail and campaign-related mail could be improved."

"They could provide a unified licensing model, including all the security features."

"The attachment scanning feature doesn't work properly."

"This solution can be frustrating. It blocks many things that should be going through."

More Mimecast Advanced Email Security cons

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."

"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."

"The licensing costs are per-user for the product that you get with them."

"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."

"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."

"The product has good pricing in terms of return on investment."

"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."

"The product price is moderate. I rate the pricing a five out of ten."

"The customers can select the license packages as per their requirements."

More Mimecast Advanced Email Security pricing and cost advice

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Top Industries

By visitors reading reviews

Comms Service Provider

13%

Manufacturing Company

10%

Construction Company

Performing Arts

Computer Software Company

11%

Financial Services Firm

Construction Company

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	12
Large Enterprise	18

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

Compared 17% of the time

Zimbra Collaboration vs KerioConnect

Compared 11% of the time

Open-Xchange vs KerioConnect

Compared 9% of the time

IceWarp vs KerioConnect

Compared 9% of the time

Superhuman vs KerioConnect

Compared 5% of the time

More KerioConnect Competitors

Check Point Email Security (formerly Harmony Email & Collaboration) vs Mimecast Advanced Email Security

Compared 16% of the time

Proofpoint Email Protection vs Mimecast Advanced Email Security

Compared 10% of the time

Microsoft Defender for Office 365 vs Mimecast Advanced Email Security

Compared 7% of the time

Barracuda Email Protection vs Mimecast Advanced Email Security

Compared 6% of the time

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

July 2026

Download KerioConnect product report

Buyer's Guide

Mimecast Advanced Email Security

June 2026

Download 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

Free Report: KerioConnect vs. Mimecast Advanced Email Security

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