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Microsoft Exchange Online Protection (EOP) vs Mimecast Advanced Email Security comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 8, 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

Cloudflare One
Sponsored
Ranking in Email Security
20th
Average Rating
8.6
Reviews Sentiment
6.5
Number of Reviews
23
Ranking in other categories
Secure Web Gateways (SWG) (12th), Data Loss Prevention (DLP) (23rd), Cloud Access Security Brokers (CASB) (12th), Distributed Denial-of-Service (DDoS) Protection (8th), Software Defined WAN (SD-WAN) Solutions (13th), Access Management (12th), Bot Management (3rd), ZTNA as a Service (8th), ZTNA (4th), Secure Access Service Edge (SASE) (9th), Remote Browser Isolation (RBI) (2nd)
Microsoft Exchange Online P...
Ranking in Email Security
8th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
42
Ranking in other categories
Anti-Malware Tools (14th)
Mimecast Advanced Email Sec...
Ranking in Email Security
4th
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
44
Ranking in other categories
Email Archiving (2nd), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)
 

Mindshare comparison

As of August 2026, in the Email Security category, the mindshare of Cloudflare One is 1.7%, up from 1.4% compared to the previous year. The mindshare of Microsoft Exchange Online Protection (EOP) is 3.0%, down from 5.7% compared to the previous year. The mindshare of Mimecast Advanced Email Security is 4.0%, down from 5.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security4.0%
Microsoft Exchange Online Protection (EOP)3.0%
Cloudflare One1.7%
Other91.3%
Email Security
 

Featured Reviews

CV
Network Architect at IP Dimension
Cloud security has improved remote access and has reduced costs for smaller client sites
I have used Cloudflare One's Identity-Aware Proxy, and it is quite straightforward from what I have seen so far. The app registration on the Azure side integrates fully into Cloudflare, and I am very satisfied with that part because it is easy to set up. The integration of Cloudflare One's Secure Web Gateway and Zero Trust Network Access works without any issues. That part is pretty automatic, and if you complete the rest of the setup, it comes together by itself with no issues from my side. What makes it nice is that we can actually start replacing on-site firewalls at this stage for the smaller clients because it does not matter if they go to a coffee shop or work from home; they are still secured by the same connection. The hops get shorter and you get better latency. We have done testing to see if it is better. One thing that we did notice with our proof of concept with our current client is that they have people connecting from the UK. When they used their previous VPN solution, uploading CAD drawings and other files to the server took a long time. They mentioned that it is much quicker on Cloudflare One's solution. I definitely believe that is part of the improved performance, and I am satisfied with that as well. What is nice about Cloudflare One is that it makes the setup easier and also easier to train technicians to maintain it. Compared to legacy systems, we do not need to get fancy firewalls in place that are costly. That is definitely also a cost-saver with Cloudflare One.
NancyHartman - PeerSpot reviewer
Business Process Manager/ Educational Technologist at a educational organization with 1,001-5,000 employees
Layered email security has protected sensitive research and still flags phishing in real time
The valuable features of Microsoft Exchange Online Protection (EOP) include providing an additional layer of protection, as it builds on the basic Exchange level of security that allows us to get our work done. Another feature I appreciate is the ability to question things, as our Exchange server allows us to identify in real-time if an email is a phishing email or spam email. It really helps us identify risks, especially through our external exchanges via email or through our cloud-based platforms. Our Exchange system blocks any embedded AI from all our applications and products, so we cannot use embedded AI in our daily work from our official laptops because we have secure information. The system is quite locked down.
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.

Quotes from Members

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

Pros

"Cloudflare Access is a stable solution."
"Cloudflare, in my opinion, was easy to implement."
"Clover is the best product globally."
"Cloudflare is simple to use."
"What makes it nice is that we can actually start replacing on-site firewalls at this stage for the smaller clients because it does not matter if they go to a coffee shop or work from home; they are still secured by the same connection."
"The solution has different options that can be used to differentiate DDoS attacks."
"It is a stable solution."
"The best feature is rate limiting. If I'm expecting 500 visits per hour, Cloudflare will limit the requests if I suddenly get 50,000."
"The initial setup of Microsoft Exchange Online Protection was easy."
"The scalability is pretty good; it does what it is supposed to do."
"We use the solution to receive emails. We do not use the calendar function as our clients are slow adaptors to the latest features."
"The email policy configuration options in Microsoft EOP are satisfactory."
"It is an easy solution."
"Microsoft EOP's most valuable feature is a shared mailbox."
"With Microsoft Exchange Online Protection, if malware is attached to a mailer, it's very easy to go into the incident alert and find out what's happening with that identity and the mail."
"The threat management feature includes policies and alerts that are valuable."
"My advice for others looking into using Mimecast Advanced Email Security is that they can strengthen their security very well if they choose to go with it."
"Its administration console is very easy to use. The administration console is absolutely important because you interact with the platform through it."
"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."
"The reviewer gave Mimecast Email Security a rating of 10 out of 10."
"The solution offers good technical support."
"It has all the features required for distribution, such as the ability to mail."
"The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature."
"Email security is the most valuable feature of the solution."
 

Cons

"For the topic of improvement, providing some training material is one of my suggestions."
"Our subscription plan for the solution has a limitation of bot signatures."
"The pricing is an area that can be improved. Pricing, as far as I recall, was the source of our problems."
"The onboarding process can be improved a little bit."
"Cloudflare One is not very powerful, but for what we require, it is basic and sufficient."
"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."
"The response time for support must be reduced."
"I would like them to include a VPN feature to provide a secure connection to the data center."
"The user interface of Microsoft Exchange Online Protection (EOP) has room for improvement, as at times it doesn't make sense where to go to access certain features."
"We would like the solution to have more in-built intelligence in the way that it reviews potential security risks, rather than our team constantly having to update the policies."
"Microsoft 365 Defender and EOP policies are stable with the proper license. However, with the basic policy, it's hard to say it's stable due to configuration limitations."
"The price of Microsoft Exchange Online Protection could be reduced to make it more competitive."
"The security features could be better and more secure in the next release."
"The management interface of Microsoft Exchange Online Protection (EOP) could be intuitive."
"The solution can be complex at times. It would be nice to have the on-server version. It needs to improve the stability as well."
"Performance and speed should continue to be improved."
"Mimecast need to ensure that the body text format is correctly handled and that images are properly embedded in the body text."
"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."
"While it's quick and easy, the initial setup could be more user-friendly."
"The interface isn't the best. How everything works on the back end is confusing."
"The feature that should be included is to remove the block on the encrypted files."
"Their support should be improved. They are notorious for sending you to knowledge-based articles rather than actually talking to you, but that is, unfortunately, kind of becoming a trend with everything. In terms of features, I haven't had any complaints. However, I don't like the fact they moved to a paid training subscription model. They used to have a lot of free webinars for training, but they have started to charge for them in the past year."
"The price could be better, it should be reduced."
"The differentiation between bulk spam mail and campaign-related mail could be improved."
 

Pricing and Cost Advice

"The solution is not that expensive."
"Cloudflare Zero Trust Platform's pricing is good."
"The price tag is no longer $200,000, but rather $300,000 to $400,000. It's twice."
"The pricing of the solution is cheap. The licensing cost is also very low. I rate the cost and pricing a three out of ten."
"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."
"The solution's pricing lacks transparency."
"My company has to make yearly payments towards the licensing costs attached to the solution. There are no hidden charges apart from the licensing costs of the solution."
"The prices are slightly expensive."
"The solution falls on the higher or more expensive side of the spectrum."
"Apart from the license fee for the solution, there are no additional costs."
"The pricing for the solution depends on what you are trying to achieve with the use of the product, but I know that it is not a cheaply priced product. Yearly payments have to be made towards the licensing fees of the solution."
"The price could be lower."
"Microsoft Exchange Online Protection is a good solution at an affordable price. It is a good investment."
"The solution should reduce the cost."
"The pricing of the solution is reasonable."
"The solution is expensive but is backed by Microsoft's reputation."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a ten."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"The product has good pricing in terms of return on investment."
"The licensing costs are per-user for the product that you get with them."
"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."
"For what it is, the product is overpriced."
"The customers can select the license packages as per their requirements."
"The product price is moderate. I rate the pricing a five out of ten."
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Top Industries

By visitors reading reviews
Construction Company
18%
Comms Service Provider
11%
Outsourcing Company
9%
Financial Services Firm
8%
Financial Services Firm
11%
Manufacturing Company
9%
Computer Software Company
8%
Government
8%
Computer Software Company
10%
Financial Services Firm
9%
Construction Company
8%
Outsourcing Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise1
Large Enterprise12
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise7
Large Enterprise11
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise12
Large Enterprise20
 

Questions from the Community

What needs improvement with Cloudflare Zero Trust Platform?
In my opinion, Cloudflare One can be improved mainly through compatibility, as the integration should be much simpler...
What is your primary use case for Cloudflare Zero Trust Platform?
Cloudflare One's primary use case for my organization is to protect servers and to provide remote access with the VPN...
What needs improvement with Microsoft Exchange Online Protection?
From an end-user point of view, I am quite happy with Microsoft Exchange Online Protection (EOP) because my favorite ...
What is your primary use case for Microsoft Exchange Online Protection?
Microsoft Exchange Online Protection (EOP) serves as the main use case for my company because, as a research company,...
What advice do you have for others considering Microsoft Exchange Online Protection?
My experience with Microsoft Exchange Online Protection (EOP) is from an end-user perspective, and I do not have admi...
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 w...
 

Also Known As

Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform
Microsoft EOP, MS Exchange Online Protection
Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Email and Collaboration Threat Protection
 

Overview

 

Sample Customers

23andMe
Information Not Available
Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport
Find out what your peers are saying about Microsoft Exchange Online Protection (EOP) vs. Mimecast Advanced Email Security and other solutions. Updated: August 2026.
909,647 professionals have used our research since 2012.