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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
8.2
Reviews Sentiment
5.9
Number of Reviews
49
Ranking in other categories
Email Archiving (1st), 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 October 2026, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Advanced Email Security is 14.1%, up from 12.7% compared to the previous year. The mindshare of Symantec Messaging Gateway is 3.1%, up from 2.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security14.1%
Symantec Messaging Gateway3.1%
Other82.8%
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.
Dennis O'Reilly - PeerSpot reviewer
Cyber SecOps Principal at Dotcom Security
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 Large File Send feature comes in handy when you have to send fairly large attachments."
"Mimecast Advanced Email Security blocks everything effectively and provides an update indicating whether you want to release or delete it."
"URL inspection works pretty well."
"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 reviewer gave Mimecast Email Security a rating of 10 out of 10."
"Mimecast Mailbox Community is an email gateway required for every organization, regardless of size."
"If I had to mention one or two things that bring the biggest benefit, I would say the security of the emails and dealing with everything."
"Mimecast Advanced Email Security proves to be a useful tool, allowing me as security personnel to work in a more peaceful manner."
"Since Symantec Messaging Gateway is a Linux-based solution it is stable."
"Symantec Messaging Gateway is stable and scalable. Installation is easy, and the deployment and maintenance can be done by one administrative person."
"Symantec’s spyware and malware signature database is very good compared to other products."
"My advice to others who plan to use Symantec Messaging Gateway is that it's a very good product, it's very stable, and it's user-friendly, but the only problem is that it doesn't have good partner support here in Bolivia, where I'm located."
"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."
"We use the solution for its advanced virus protection, phishing and other features."
"The setup is pretty simple."
"Symantec Messaging Gateway has a huge knowledge base about phishing, spamming, spoofing, etc."
 

Cons

"Moving forward, there is concern about AI and security."
"It analyzes patterns but sometimes overlooks suspicious indicators."
"They should improve the cookies management feature."
"Mimecast Advanced Email Security needs to improve in this area because they are only focusing on a particular set of problems which is on email and human risk, whereas companies that need a slightly bigger picture will look elsewhere."
"Improvements for Mimecast Advanced Email Security include enhancing the user interface and accessibility, particularly regarding admin capabilities to add or modify user accounts."
"It was not a good experience due to the fact that our main infrastructure had a problem for that entire time."
"As for areas for improvement within Mimecast Web Security, I believe there is quite a lot that can be improved."
"The interface and the documentation could be improved."
"Symantec Messaging Gateway should include better exclusions and exceptions for better administration."
"Sometimes the solution picks up false positive for viruses during scans."
"In a later release, it would be nice if the messaging gateway supported the cluster feature."
"Since it was purchased by Broadcomm, we've found there's been a general slide in terms of the local services we have access to and we are considering replacing them."
"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 false positive submissions must be improved."
"This product would benefit from better integration with Symantec Endpoint Protection."
"Support could be better. What's also 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."
 

Pricing and Cost Advice

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

By visitors reading reviews
Outsourcing Company
10%
Computer Software Company
9%
Financial Services Firm
9%
Manufacturing Company
8%
Outsourcing Company
19%
Construction Company
15%
Financial Services Firm
11%
Transportation Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise12
Large Enterprise23
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
Earn 20 points
 

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: September 2026.
919,894 professionals have used our research since 2012.