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Coro vs Microsoft Defender for Office 365 comparison

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Comparison Buyer's Guide

Executive Summary

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
8.8
Reviews Sentiment
6.7
Number of Reviews
22
Ranking in other categories
Secure Web Gateways (SWG) (15th), Data Loss Prevention (DLP) (21st), Cloud Access Security Brokers (CASB) (11th), Distributed Denial-of-Service (DDoS) Protection (7th), Software Defined WAN (SD-WAN) Solutions (13th), Access Management (12th), Bot Management (3rd), ZTNA as a Service (8th), ZTNA (3rd), Secure Access Service Edge (SASE) (10th), Remote Browser Isolation (RBI) (3rd)
Coro
Ranking in Email Security
48th
Average Rating
0.0
Reviews Sentiment
3.1
Number of Reviews
1
Ranking in other categories
Data Loss Prevention (DLP) (70th), Endpoint Protection Platform (EPP) (51st), Endpoint Detection and Response (EDR) (57th)
Microsoft Defender for Offi...
Ranking in Email Security
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (1st)
 

Mindshare comparison

As of March 2026, in the Email Security category, the mindshare of Cloudflare One is 1.5%, down from 1.8% compared to the previous year. The mindshare of Coro is 0.4%, down from 0.5% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 8.8%, down from 13.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3658.8%
Cloudflare One1.5%
Coro0.4%
Other89.3%
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.
Vignesh  K - PeerSpot reviewer
Practice Engineer at Cloudunicorn.in
Auto scanning and enhanced security but re-adding protections need improvement
At that time, we observed certain issues with the product. The functionalities could be improved, such as the isolation feature. If we remove our protection, we cannot easily add it back. If, in our organization, we need to remove a specific system for a particular time, we cannot add it back for security after doing so. This is one thing we have experienced. Scalability is also lacking. If we want to do the same thing repeatedly, there's not much the solution offers; it isn't very strong.
Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.

Quotes from Members

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

Pros

"It's the endpoint exposition. We don't need to expose our VPN server to the internet and need a zero-test solution. I can apply some conditional access to the endpoint that's connecting to our network to check their security policies or the security condition of their workstation. Once the workstation is trying to connect to my internal network, then I would like to check the discrete condition of these endpoints that are trying to access my internal network. We created some conditional access. We have CrowdStrike, to check if the CrowdStrike is installed, to check if it's updated, and to check for Windows updates. We created some conditional policies to check it."
"It is a stable solution."
"The simplicity of the solution is its valuable features as almost no effort was needed to learn the configurations. It is also one of the cheapest firewalls available in this category."
"This solution is easy to understand and easy to configure."
"The blocking feature is very good."
"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."
"For Cloudflare Access, I am using the free plan...The most valuable feature is their protection."
"Clover is the best product globally."
"The auto-scanning feature is quite beneficial."
"The auto-scanning feature is quite beneficial."
"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."
"Defender for 365 is a comprehensive cloud-based solution. The value of the cloud is that you aren't alone. Threat intelligence and analytics are shared in the cloud. We don't have to find the solution alone. If you face an unknown threat with traditional solutions like Trend Micro and Symantec, you need to open a case and send your information to them to analyze forensically and identify the source of the attack."
"The technical support is good and quick to resolve issues."
"Defender is a SaaS platform, so it offers more flexibility. Managing the permissions is easier. The solution's automated detection and response features are scalable."
"Microsoft Defender for Office 365 helps people to work remotely. It is a secure solution. We don't need to use our company's computers or get VPN connections to the networks. I can control how they share screens and what they send to the devices. It keeps our organizations confidential and sensitive information safe."
"The stability of Microsoft Defender for Office 365 is fantastic."
"Defender enables us to secure all 365-related activity from a single place. It gives us visibility into everything happening in Outlook, protecting us against phishing and other email-based threats. Defender helps us detect any suspicious behaviors."
"It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment."
 

Cons

"The free plan has limitations. For example, I can only set up three rules, and the application firewall is unavailable."
"Feedback could be enhanced. While I work efficiently with Clover as a partner in Mexico City, sometimes the information and requests are easier to manage with more concrete solutions."
"Our subscription plan for the solution has a limitation of bot signatures."
"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."
"Our customers no longer use Cloudflare because its service is subpar."
"The software has automated alerts, but the automated alerts are not available in the mobile app."
"The response time for support must be reduced."
"For the topic of improvement, providing some training material is one of my suggestions."
"Scalability is lacking. If we want to do the same thing repeatedly, there's not much the solution offers; it isn't very strong."
"The functionalities could be improved, such as the isolation feature."
"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."
"Microsoft Defender for Office 365 should be more proactive."
"One area for improvement is integration. For example, when it comes to external SaaS platforms, we were not able to get a lot of information on integrations with such apps for security and authentication."
"The pre-sales cost calculations could be more transparent."
"The GUI is sometimes slow to fetch the device report and could be improved."
"The cost of Security Copilot is up there right now, and I think it needs to come down for more people to adopt."
"There is room for improvement in terms of reporting."
"There needs to be an improvement in integrating the product to work across multiple operating systems, and to have better support for non-Microsoft file types."
 

Pricing and Cost Advice

"Cloudflare Zero Trust Platform's pricing is good."
"The solution's pricing lacks transparency."
"The prices are slightly expensive."
"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."
"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 solution is not that expensive."
Information not available
"The pricing has become expensive."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"The license is expensive because the cost is based on the number of users."
"The product is very expensive."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"Defender for 365 comes in various plans and licenses, along with other Microsoft security solutions. Purchasing this kind of package or security bundle gives good value for money, and that's what I recommend."
"The solution could be better by simplifying the business model of their licensing. It was hard to figure out how to get the licensing done for the environment, initially."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
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Top Industries

By visitors reading reviews
Comms Service Provider
10%
Computer Software Company
9%
Financial Services Firm
8%
Manufacturing Company
8%
Computer Software Company
10%
Manufacturing Company
9%
Comms Service Provider
8%
Retailer
7%
Computer Software Company
13%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise2
Large Enterprise10
No data available
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise10
Large Enterprise31
 

Questions from the Community

What needs improvement with Cloudflare Access?
Cloudflare Access has strong integration with Microsoft, among other platforms. However, when it comes to Kaspersky, ...
What is your primary use case for Cloudflare Access?
Cloudflare Access provides secure access to internal applications for employees, external members of the organization...
What advice do you have for others considering Cloudflare Access?
Cloudflare Access is one of the best integrations available. While about two hundred vendors offer similar services, ...
What is your experience regarding pricing and costs for Coro?
The cost is reasonable because it is aimed at SMB customers, not enterprise customers. The prices are reasonable. We ...
What needs improvement with Coro?
At that time, we observed certain issues with the product. The functionalities could be improved, such as the isolati...
What is your primary use case for Coro?
We have not sold the product to any customers as of now. We are still in the testing phase, which means we, along wit...
What needs improvement with Microsoft Defender for Office 365?
The inbuilt analysis of false positives can be faster. It's not slow, but it can be faster.
What is your primary use case for Microsoft Defender for Office 365?
My use case for Microsoft Defender for Office 365 is for email protection, safe links, protection of links, documents...
 

Also Known As

Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform
No data available
MS Defender for Office 365
 

Overview

 

Sample Customers

23andMe
Lenovo, Dropbox, T-Systems
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Proofpoint, Microsoft, Check Point Software Technologies and others in Email Security. Updated: February 2026.
884,873 professionals have used our research since 2012.