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Mimecast Email and Collaboration Threat Protection vs Symantec Messaging Gateway comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Feb 11, 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

Mimecast Email and Collabor...
Ranking in Secure Email Gateway (SEG)
4th
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
39
Ranking in other categories
Email Archiving (2nd), Secure Web Gateways (SWG) (20th), Office 365 Protection (3rd)
Symantec Messaging Gateway
Ranking in Secure Email Gateway (SEG)
12th
Average Rating
8.2
Reviews Sentiment
6.8
Number of Reviews
20
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of February 2026, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Email and Collaboration Threat Protection is 16.6%, up from 11.6% compared to the previous year. The mindshare of Symantec Messaging Gateway is 2.3%, down from 3.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Advanced Email Security16.6%
Symantec Messaging Gateway2.3%
Other81.1%
Secure Email Gateway (SEG)
 

Featured Reviews

HS
Email Security Engineer at Logic Infosecurity
Experience high detection and user-friendly policies with reliable email security implementation
The system is not user-friendly because you have to create policies that are mapped in a dictionary. As an IT engineer, I understand how it works, but explaining it to another IT person can be difficult. Having more user-friendly dashboards would improve the work experience. In Mimecast Email Security, checking policies in the dictionary or gateway is very complicated, and not everyone understands this process. If you examine the Check Point portal, it's user-friendly with easily accessible tabs that anyone can explore. With Mimecast Email Security, making changes might impact existing mailboxes. The portal is complicated compared to Check Point's user-friendly interface.
Girish Vijay - PeerSpot reviewer
Deputy Manager IT at Carl Bechem Lubricants India Pvt. Ltd.
A stable and reasonably priced solution that performs well and has a very good malware database
Since Symantec merged with Broadcom, they might have lost some good technical engineers. Maybe that’s the reason why the product is performing poorly. When we have a good marketing and sales team, even though our product cannot perform, we will sell it at a high price because of the buzzwords. However, at the end of the day, the product should perform. Most of the products might not perform. Symantec is a very good product, but the services are basic. I rate the technical features of the product a nine out of ten. However, I would rate the services provided by the solution a six out of ten. Overall, I rate the tool an eight out of ten.

Quotes from Members

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

Pros

"The platform's most valuable features are journaling and email archiving, effectively stopping phishing attacks."
"The Large File Send feature comes in handy when you have to send fairly large attachments."
"Mimecast has some good support services in place."
"I would rate Mimecast Email Security a nine out of ten."
"The solution offers good technical support."
"URL inspection works pretty well."
"The most valuable feature of Mimecast Mailbox Continuity is real-time alerts."
"The most valuable feature is the DMARC Analyzer."
"Symantec’s spyware and malware signature database is very good compared to other products."
"The solution is "set and forget". You pay for it and everything is done for you."
"The solution is highly customizable. You can make rules for domains and configure policies for spam or malware. Messaging Gateway is an on-prem solution, so it's useful for companies without a cloud presence."
"It has very good capabilities for managing malware."
"Symantec is a secure product."
"Symantec Messaging Gateway has a good GUI, and it is very powerful in detecting viruses and spam."
"The cloud-based interface is very user-friendly."
"The setup is pretty simple."
 

Cons

"Certainly, the primary area needing improvement is Mimecast's customer support. Our experience as Mimecast customers has been less than satisfactory. Even when raising a priority ticket, the response time is unacceptably long, often taking around five to six hours. This level of service is disappointing. Additionally, there have been recurring service disruptions in the UK region, leading to extended email delays due to various service issues. This year alone, we've encountered such problems on approximately four occasions."
"External security features need improvement."
"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."
"Lately, Mimecast's outbound mail servers have been regularly blocklisted by spam filters. That didn't happen a few years back, but it seems to be a more frequent problem these days. When a server is blocklisted, it means all of my outgoing mail ends up in the recipient's junk mail. That affects my reputation and business confidence."
"The installation is not so straightforward."
"The interface isn't the best. How everything works on the back end is confusing."
"The detection rates are an area for improvement."
"Technical support has been slower than it was in the past, likely due to the pandemic."
"Sometimes the solution picks up false positive for viruses during scans."
"The solution takes up a lot of memory."
"This product would benefit from better integration with Symantec Endpoint Protection."
"The product must improve the user dashboards."
"What's lacking when you compare it with Proofpoint and other threat protection solutions is that it does the basic stuff, but we need more advanced threat handling."
"Messaging Gateway's advanced malware detection could be improved."
"Symantec Messaging Gateway should include better exclusions and exceptions for better administration."
"Symantec Messaging Gateway can improve detection because most of them are false negatives or false positives that we are trying to troubleshoot. Additionally, we are having routing problems and they are somehow connected to DNS issues."
 

Pricing and Cost Advice

"The price of Mimecast Mailbox Continuity is expensive."
"The product has good pricing in terms of return on investment."
"The customers can select the license packages as per their requirements."
"It is a bit expensive."
"I'm always going to say the price needs to be lower, but it's reasonable."
"For what it is, the product is overpriced."
"The solution is expensive."
"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 cost of Symantec Messaging Gateway is too expensive in general. However, the appliance also includes the price of the license in the same bundle."
"Symantec Messaging Gateway’s pricing is very cheap."
"It's a bit expensive compared to its competitor Barracuda Email Security Gateway but cheaper than Sophos Email."
"A subscription for technical support costs extra."
"For 150 users, we pay INR 1,60,000."
"They're a little costly compared to Microsoft."
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Top Industries

By visitors reading reviews
Computer Software Company
13%
Financial Services Firm
8%
Manufacturing Company
6%
Comms Service Provider
5%
Financial Services Firm
18%
Computer Software Company
11%
Manufacturing Company
7%
Marketing Services Firm
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise11
Large Enterprise13
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise1
Large Enterprise8
 

Questions from the Community

What do you like most about Mimecast Email Security with Targeted Threat Protection?
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.
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...
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Also Known As

Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Mimecast Advanced Email Security
Symantec.cloud, Symantec Email Security.cloud
 

Overview

 

Sample Customers

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Doric, Joblink Plus, Our Lady of Mercy College, Parramatta, PPB Advisory, Slater & Gordon Lawyers, Sydney Adventist Hospital Ltd.
Find out what your peers are saying about Mimecast Email and Collaboration Threat Protection vs. Symantec Messaging Gateway and other solutions. Updated: February 2026.
882,813 professionals have used our research since 2012.