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Mimecast Email Security vs Symantec Messaging Gateway comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 5, 2024

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 Security
Ranking in Secure Email Gateway (SEG)
4th
Average Rating
8.0
Reviews Sentiment
6.1
Number of Reviews
31
Ranking in other categories
Office 365 Protection (3rd)
Symantec Messaging Gateway
Ranking in Secure Email Gateway (SEG)
9th
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 October 2025, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Email Security is 12.5%, down from 15.0% compared to the previous year. The mindshare of Symantec Messaging Gateway is 2.6%, up from 2.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Email Security12.5%
Symantec Messaging Gateway2.6%
Other84.9%
Secure Email Gateway (SEG)
 

Featured Reviews

Frank Rawson - PeerSpot reviewer
It gives clients peace of mind and helps them educate their users about threats
A few years ago, our team found the implementation to be somewhat challenging. It has gotten easier as we've grown more experienced. The difficulty depends on the expertise of the person doing it. I don't work with Mimecast every day, so it might be more difficult for me than it is for one of my techs who regularly does Mimecast implementations. It requires some specific in-depth product knowledge and an understanding of email solutions. The deployment time varies. In South Africa, it depends on who you use to deploy it. If you use one of Mimecast's local partners, it can take up to two weeks because of their process. However, it's only about four to eight hours of work. After deployment, there isn't much maintenance aside from supporting and educating your customers. Users require constant education on how to use the Mimecast client and release an email that has been blocked.
Dennis O'Reilly - PeerSpot reviewer
The product provides good content filtering options, but the false positive submissions must be improved
The tool is very stable. I rate the stability a seven out of ten. It's an on-premise application that runs on a virtual machine. It has dependencies on the hypervisor host that we're running it on. If it's not configured, the application can be influenced by it. Sometimes, there is a service stop error while the service is still running. Sometimes, the service just stops. Some policies do not act the way that we intend them to respond.

Quotes from Members

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

Pros

"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 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."
"I would rate Mimecast Email Security a nine out of ten."
"In terms of efficacy, Proofpoint is better than Mimecast, though it's a little difficult to manage."
"It offers an easy initial setup."
"It's good, it keeps the spam out."
"Email security is the most valuable feature of the solution."
"The solution is scalable."
"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."
"The most valuable feature of the solution is the content filtering policies because the solution offers huge options for configuration, such as hardware manipulation, et cetera, and the dictionaries make the work easier."
"The cloud-based interface is very user-friendly."
"It is a solid and stable product."
"The solution is "set and forget". You pay for it and everything is done for you."
"Symantec Messaging Gateway has a huge knowledge base about phishing, spamming, spoofing, etc."
"The most valuable features of Symantec Messaging Gateway are advanced content filtering, malware, and antivirus defense."
"Symantec Messaging Gateway has a good GUI, and it is very powerful in detecting viruses and spam."
 

Cons

"The filtering needs more flexibility."
"I'd like to have better support from the product in the future."
"The solution is very expensive."
"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."
"While it's quick and easy, the initial setup could be more user-friendly."
"External security features need improvement."
"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."
"The tool can be challenging because it relies on rule-based configurations, especially for addressing impersonation threats. This approach requires setting up numerous rules to ensure filtering. It should work based on behavior-based analytics."
"They really need to create a good package that competes with Microsoft."
"What needs to be improved in Symantec Messaging Gateway is its local partner support, as it's not as technical. The support my company gets from the partner isn't good. Vendor support is good, but local partner support isn't. I'm happy with Symantec Messaging Gateway as a solution, but the problem is with its partner support. To me, Symantec Messaging Gateway is a complete solution, but it can be very difficult to search the web for resolutions to issues or problems you experience from it. If this could be improved or resolved in the next release of Symantec Messaging Gateway, then that would be good."
"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."
"The documentation could have more detailed examples of how to use the product in various situations. As more companies shift to the cloud, they could better integrate the on-prem and cloud versions through an on-prem client."
"The product must improve the user dashboards."
"In a later release, it would be nice if the messaging gateway supported the cluster feature."
"It could be more scalable."
"Sometimes the solution picks up false positive for viruses during scans."
 

Pricing and Cost Advice

"We pay monthly fees to our provider."
"The licensing costs are per-user for the product that you get with them."
"I'm always going to say the price needs to be lower, but it's reasonable."
"It's an expensive solution."
"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 product price is moderate. I rate the pricing a five out of ten."
"It is a bit expensive."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"It's a bit expensive compared to its competitor Barracuda Email Security Gateway but cheaper than Sophos Email."
"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."
"For 150 users, we pay INR 1,60,000."
"A subscription for technical support costs extra."
"They're a little costly compared to Microsoft."
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
6%
Financial Services Firm
23%
Computer Software Company
15%
Government
8%
Manufacturing Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise7
Large Enterprise11
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?
Mimecast Email Security can be improved by adding some API integrations. Instead of remaining a traditional gateway, Mimecast Email Security needs to provide API solutions similar to Check Point.
What needs improvement with Symantec Messaging Gateway?
The solution takes up a lot of memory. The system becomes slow. The performance must be improved.
What is your primary use case for Symantec Messaging Gateway?
We use the solution to secure our data and emails.
 

Also Known As

Mimecast Email Security with Targeted Threat Protection
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 Security vs. Symantec Messaging Gateway and other solutions. Updated: September 2025.
868,787 professionals have used our research since 2012.