KerioConnect vs Mimecast Advanced Email Security comparison

Why PeerSpot?

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 #1 with an average rating of 8.6. GFI holds a 3.5% mindshare in EA, compared to Mimecast’s 12.7% 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

2,354 Views
541 Comparison Views

62% willing to recommend

Mimecast Advanced Email Sec...

Read 49 Mimecast Advanced Email Security reviews

11,790 Views
2,004 Comparison Views

92% willing to recommend

KerioConnect

Mimecast Advanced Email Sec...

Comparison Buyer's Guide

Download the report

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: September 2026).

Buyer's Guide

KerioConnect vs. Mimecast Advanced Email Security

September 2026

Download the complete report

Helped 918,169 peers since 2012

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

1st

Average Rating

8.2

Reviews Sentiment

5.9

Number of Reviews

Ranking in other categories

Email Security (4th), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)

Mindshare comparison

As of October 2026, in the Email Archiving category, the mindshare of KerioConnect is 3.5%, up from 1.2% compared to the previous year. The mindshare of Mimecast Advanced Email Security is 12.7%, down from 21.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Archiving Mindshare Distribution
Product	Mindshare (%)
Mimecast Advanced Email Security	12.7%
KerioConnect	3.5%
Other	83.8%

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.

Read full review

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

"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. 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 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."

"We use the solution as a mail server. It connects with Outlook and is used for calendaring and similar tasks."

"It's relatively simple to use."

"The most valuable features are its ease of use, excellent pricing, and it is platform agnostic."

"The user interface is good."

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

More KerioConnect pros

"The anti-spam handling is very good, as it picks up a lot of junk, malware, and other threats."

"It's good, it keeps the spam out."

"The solution is pretty straightforward to use and easy to set up."

"Overall, I consider Mimecast Advanced Email Security to be a reliable and effective security solution, with the highest value for organizations that face significant phishing and email-based threats and are willing to invest time in proper configuration and monitoring."

"Mimecast Advanced Email Security proves to be a useful tool, allowing me as security personnel to work in a more peaceful manner."

"In the current environment that the world is in, everyone is trying to hack everyone else, so Project+ definitely helps a lot there."

"It's good, it keeps the spam out, and it does a really good job at not allowing threats through."

"In terms of efficacy, Proofpoint is better than Mimecast, though it's a little difficult to manage."

More Mimecast Advanced Email Security pros

Cons

"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."

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

"Having a native Outlook map integration would make Kerio Connect better."

"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."

"I don't particularly like this solution. I would not recommend this solution to others."

"I would like to see better support from their support team."

"It could be simpler to use and install, but I still wouldn't use it because there isn't a compelling use case."

"KerioConnect is stable as long as you use a strong password."

More KerioConnect cons

"The interface isn't the best. How everything works on the back end is confusing."

"For improvement, I would say some of the catalogs, while navigating, were a little tricky."

"As for areas for improvement within Mimecast Web Security, I believe there is quite a lot that can be improved."

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

"Mimecast needs to reduce the number of false positive emails; a big pain point for us."

"The solution is complex and not easy to use."

"Many of our users complain that the system is blocking too many attachments. It's a good practice from a security perspective, but our users think Mimecast is doing too much. It might be something we'll have to adjust."

"Mimecast Email Security is somewhat expensive compared to the competition in the Indian market, and the local presence is lacking as they do not have a local representative currently."

More Mimecast Advanced Email Security cons

Pricing and Cost Advice

"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."

"KerioConnect has a first-time cost and yearly subscription. It is not expensive."

"The price of Kerio Connect is better when comparing it to others solutions."

"It's an expensive solution."

"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."

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

"I'm always going to say the price needs to be lower, but it's reasonable."

"The price of Mimecast Mailbox Continuity is expensive."

"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."

More Mimecast Advanced Email Security pricing and cost advice

See which vendors are best for you

Use our free recommendation engine to learn which Email Archiving solutions are best for your needs.

See recommendations

918,169 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Manufacturing Company

11%

Comms Service Provider

11%

Outsourcing Company

10%

Construction Company

Outsourcing Company

10%

Computer Software Company

Financial Services Firm

Construction 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	23
Midsize Enterprise	12
Large Enterprise	23

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 13% of the time

Zimbra Collaboration vs KerioConnect

Compared 10% of the time

IceWarp vs KerioConnect

Compared 9% of the time

Open-Xchange vs KerioConnect

Compared 9% of the time

Superhuman vs KerioConnect

Compared 4% of the time

More KerioConnect Competitors

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

Compared 12% of the time

Proofpoint Email Protection vs Mimecast Advanced Email Security

Compared 8% of the time

Microsoft Defender for Office 365 vs Mimecast Advanced Email Security

Compared 5% of the time

Barracuda Email Protection vs Mimecast Advanced Email Security

Compared 4% 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

October 2026

Download KerioConnect product report

Buyer's Guide

Mimecast Advanced Email Security

October 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 Email Security protects organizations against phishing, malware, business email compromise, and impersonation attacks, with detection built on 20 years of experience and over 1.3 billion emails inspected daily. It's available as a secure email gateway (MX-based) for full control over complex, multi-region environments, or via API integration with Microsoft 365, which deploys in hours with no MX changes. Administrators get a single console for policy management, monitoring external communications, and customizing configurations, and can pair it with Mimecast Cloud Archive for long-term email retention and compliance.

What key features should users explore?

Sandboxing: Full emulation sandboxing and AI-driven static analysis detect threats in attachments before delivery.
Spam and Phishing Protection: Multi-layered detection catches both payload-based attacks and payloadless, socially-engineered BEC attempts.
URL Inspection: Computer Vision AI analyzes destination pages to catch phishing and brand impersonation.
API Deployment Option: Deploys in hours without MX or mail flow changes, with 30-day historical scanning to show threats your current defenses missed.
Email Archiving (via Cloud Archive): Secure long-term storage supporting compliance needs.

What benefits can impact ROI?

Regulatory Compliance: Supports adherence to standards like HIPAA through retention and monitoring.
Integration: Deep integration with Microsoft 365, deployable as a gateway or via API depending on your environment.
Rapid Time to Value: API deployment proves protection value in hours, before any infrastructure commitment.
Threat Prevention: Detection engines refined daily against 1.3 billion emails, trusted by 42,000 customers globally.

Industries and use cases

Mimecast Email Security is used across industries, including healthcare and finance, to secure inbound and outbound communications and support compliance requirements. Enterprises use it as a gateway, an API-based layer on top of Microsoft 365, or both, depending on how much control versus deployment speed they need.

Mimecast

Sample Customers

Southern Tier Brewing Company, Innotta, Baustoff + Metall, Hamifleurs, Chanson TV, Ryman Stationery

Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport

Buyer's Guide

KerioConnect vs. Mimecast Advanced Email Security

September 2026

Free Report: KerioConnect vs. Mimecast Advanced Email Security

Find out what your peers are saying about KerioConnect vs. Mimecast Advanced Email Security and other solutions. Updated: September 2026.

DOWNLOAD NOW

918,169 professionals have used our research since 2012.

See our KerioConnect vs. Mimecast Advanced Email Security report.

See our list of best Email Archiving vendors.

We monitor all Email Archiving reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.