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Mimecast Advanced Email Security vs Symantec Messaging Gateway comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jun 2, 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 Advanced Email Sec...
Ranking in Secure Email Gateway (SEG)
3rd
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
44
Ranking in other categories
Email Archiving (2nd), Email Security (4th), Office 365 Protection (2nd)
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 August 2026, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Advanced Email Security is 14.6%, up from 12.6% compared to the previous year. The mindshare of Symantec Messaging Gateway is 2.8%, up from 2.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security14.6%
Symantec Messaging Gateway2.8%
Other82.6%
Secure Email Gateway (SEG)
 

Featured Reviews

Avinash Mishra - PeerSpot reviewer
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.
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

"We like Mimecast's spam filtering. The email signature feature is also a big plus for our users."
"The solution offers good technical support."
"The setup was easy."
"The reviewer gave Mimecast Email Security a rating of 10 out of 10."
"Mimecast Advanced Email Security has positively impacted our organization by securing our environment better than before compared to what we used to configure earlier to deliver the email."
"Based on overall experience, Mimecast Email Security is the best solution for traditional gateways."
"Mimecast Advanced Email Security is a good product and is very stable."
"I would rate Mimecast Email Security a nine out of ten."
"The solution is excellent at blocking spam."
"Symantec Messaging Gateway is stable and scalable."
"The solution is "set and forget". You pay for it and everything is done for you."
"Symantec’s spyware and malware signature database is very good compared to other products."
"Symantec is a secure product."
"I've been using Messaging Gateway for ten years."
"Since Symantec Messaging Gateway is a Linux-based solution it is stable."
"We use the solution for its advanced virus protection, phishing and other features."
 

Cons

"They could provide a unified licensing model, including all the security features."
"The solution should include more AI features instead of Mimecast's more general static configuration tooling."
"Its pricing can be improved. It is a bit expensive."
"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."
"I don't think it's ideally suited for maybe a smaller business environment, like, for example, for companies with less than 100 seats."
"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."
"It was not a good experience due to the fact that our main infrastructure had a problem for that entire time."
"External security features need improvement."
"Symantec Messaging Gateway should include better exclusions and exceptions for better administration."
"It is a nice product but is not user friendly in terms of the graphical interface. It is poor and is not rich in terms of the human interface."
"The biggest problem is it's an on-prem product and we're trying to get out of having equipment in data centers."
"We've had issues in the past where the user finds spam, and Symantec does not recognize it as spam."
"This product would benefit from better integration with Symantec Endpoint Protection."
"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 solution takes up a lot of memory."
"It will provide Excel reports and PDF reports, but it would be great if they supported the concept of Crystal Reports."
 

Pricing and Cost Advice

"The price of Mimecast Mailbox Continuity is expensive."
"The product price is moderate. I rate the pricing a five out of ten."
"The solution is expensive."
"I'm always going to say the price needs to be lower, but it's reasonable."
"The product has good pricing in terms of return on investment."
"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."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"For 150 users, we pay INR 1,60,000."
"Symantec Messaging Gateway’s pricing is very cheap."
"A subscription for technical support costs extra."
"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."
"They're a little costly compared to Microsoft."
"It's a bit expensive compared to its competitor Barracuda Email Security Gateway but cheaper than Sophos Email."
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Top Industries

By visitors reading reviews
Computer Software Company
10%
Financial Services Firm
9%
Outsourcing Company
9%
Construction Company
8%
Construction Company
16%
Financial Services Firm
16%
Outsourcing Company
14%
Marketing Services Firm
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise12
Large Enterprise20
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise1
Large Enterprise9
 

Questions from the Community

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...
Ask a question
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Also Known As

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

Overview

 

Sample Customers

Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport
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 Advanced Email Security vs. Symantec Messaging Gateway and other solutions. Updated: August 2026.
911,549 professionals have used our research since 2012.