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Kaspersky Security for Internet Gateway 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
8.6
Reviews Sentiment
6.5
Number of Reviews
23
Ranking in other categories
Secure Web Gateways (SWG) (12th), Data Loss Prevention (DLP) (22nd), 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)
Kaspersky Security for Inte...
Ranking in Email Security
29th
Average Rating
8.6
Reviews Sentiment
6.4
Number of Reviews
9
Ranking in other categories
Advanced Threat Protection (ATP) (31st), Anti-Malware Tools (39th), Secure Email Gateway (SEG) (11th)
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) (3rd), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (2nd)
 

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 Kaspersky Security for Internet Gateway is 0.1%, up from 0.0% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 5.7%, down from 11.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3655.7%
Cloudflare One1.7%
Kaspersky Security for Internet Gateway0.1%
Other92.5%
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.
reviewer2736225 - PeerSpot reviewer
Program Manager at a outsourcing company with 51-200 employees
Effective threat protection with room for cost and usability improvements
There are some drawbacks that I would mention. To be frank, enterprises always look for cost benefits, so Kaspersky could implement some price benefits. Additionally, regarding know-how, if I am an experienced person it's fine, but when someone novice is working with it, they need information about why certain actions are required. Security is a field that is very vast, and implications are not known to everyone. In future updates, a quick walk-through and know-how features would be beneficial, such as information text at relevant places. This will increase usability. Feature-wise, an impact analysis would be a really good addition.
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

"Cloudflare, in my opinion, was easy to implement."
"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."
"The tool also offers good scalability, and the dashboard, along with real-time analytics, is very good."
"The blocking feature is very good."
"The capabilities of the software are strong enough for me to do what it's supposed to do. For me, we don't need to do a lot of configuration on our site. We just enable it and monitor it."
"Cloudflare Access is part of the Zero Trust philosophy."
"Cloudflare is by far the most effective solution that I have come across."
"I'm very satisfied with the environment and the dashboard."
"I would recommend it to others as it's easy to use."
"The most valuable feature of Kaspersky Security for Internet Gateway is the antivirus."
"The password thing is very good, and the overall URL protection."
"The most valuable features of the solution are the antivirus and child protection features."
"The most valuable aspect for me is the user-friendly interface."
"When it comes to threat detection, it is very strict with file downloads and uploads. It sends reports and quarantines suspicious files."
"Kaspersky Security for Internet Gateway has positively impacted our organization by helping us control unwanted attacks and limiting our exposure to risks."
"The most valuable features of this solution are its ease of use and operation efficiency."
"The deployment capability is a great feature, and we're able to activate this feature throughout France with a click."
"The initial setup is straightforward. You just add the license, click it, and then you can set up the rules. It is quite simple."
"The stability of Microsoft Defender for Office 365 is fantastic."
"The deployment capability is a great feature."
"The risk level notifications are most valuable. We get to know what kind of intrusion or attack is there, and we can fix a problem on time."
"Since we have started using the solution, there have been fewer compromises."
"The most valuable feature of Microsoft Defender for Office 365 is its spam filter."
"I like its investigation capabilities, as that is what is most important to me. It is fairly simple with a user-friendly interface."
 

Cons

"Operating and tuning the product is difficult."
"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."
"Automation could be improved where you can easily add a TLS and SSL certificate to an application or web app if the developer did not include it."
"The free plan has limitations. For example, I can only set up three rules, and the application firewall is unavailable."
"From a logging perspective, it is still a bit difficult to see exactly what users are being blocked with the current views."
"The initial onboarding was causing us some confusion."
"I would like them to include a VPN feature to provide a secure connection to the data center."
"Feedback could be enhanced."
"I believe the absence of a procedure is the main issue."
"In different locations, they're priced differently, but that's mainly marketing rather than the product features."
"When I do a configuration, I do not know what implication it will have downstream."
"The customer support of the product is an area with shortcomings where improvements are required."
"The initial setup of Kaspersky Security for Internet Gateway is complex. The full deployment took approximately two weeks."
"There is room for improvement in terms of the pricing."
"It might be helpful to have notifications on mobile devices, especially if the same browser profile is used on both mobile and laptop."
"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."
"Sometimes I have to recategorize things when it takes the wrong step and I do not want it to classify something as suspicious."
"We are waiting for better software to block viruses."
"This product's effectiveness could be improved, in terms of detecting unwanted spam or even malware between the emails, compared to other products."
"Microsoft Defender for Office 365 could improve by giving customers information on techniques to prevent threats."
"About eight months ago, we started to measure the quantity of phishing and spam that we have been receiving, and it has been increasing a lot. That means that protection for our email is not as good as we were expecting."
"One area for improvement is support, in terms of being able to reach them and, especially, technical support for configuration."
"I was looking for some advanced features, like if I would receive an email that contains a legitimate file type, but the content is malicious, how I can protect against that?"
 

Pricing and Cost Advice

"The prices are slightly expensive."
"The solution's pricing lacks transparency."
"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."
"The price tag is no longer $200,000, but rather $300,000 to $400,000. It's twice."
"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 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 solution is not that expensive."
"Cloudflare Zero Trust Platform's pricing is good."
"I rate the product's price an eight on a scale of one to ten, where one is very cheap, and ten is very expensive."
"Personal computer licenses can be expensive if you were to scale the solution extensively. However, large companies will most likely use Endpoint solutions and not this one."
"I am okay with the pricing."
"I would rate the pricing a seven out of ten, with ten being very expensive and one being cheap. It's neither too cheap nor too expensive."
"It is expensive."
"The cost is relatively high, and as a licensed product, there are restrictions on the number of users permitted per license."
"While Microsoft Defender for Office 365 necessitates pricier E3 or E5 subscriptions, the extensive functionality offered by these licenses across various Microsoft products justifies the investment."
"For licensing, it's usually a yearly package for customers who are subscribed to Office 365, but they can also pay on a monthly basis."
"It's a user-base subscription."
"The pricing is normal. Considering its popularity, it's not overpriced."
"I know that the product is incredibly expensive."
"The license is expensive because the cost is based on the number of users."
"The pricing has become expensive."
"The product is very expensive."
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Top Industries

By visitors reading reviews
Construction Company
19%
Comms Service Provider
11%
Outsourcing Company
9%
Financial Services Firm
8%
Outsourcing Company
14%
Construction Company
14%
Pharma/Biotech Company
11%
Computer Software Company
11%
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
9%
Comms Service Provider
7%
 

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 Business6
Midsize Enterprise1
Large Enterprise2
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
 

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 is your experience regarding pricing and costs for Kaspersky Security for Internet Gateway?
Regarding pricing, I'll be exactly on the brink, neither for it nor against it because being a small company, it's a ...
What is your primary use case for Kaspersky Security for Internet Gateway?
We work with a cloud solution. The product that we use is developed as a SaaS model. In this case, we work with AWS a...
What advice do you have for others considering Kaspersky Security for Internet Gateway?
That's a very generic feedback. I would not have much information about threat intelligence metrics through Kaspersky...
What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
My experience with pricing, setup, and licensing is that it's actually quite reasonable even on the licensing side as...
What needs improvement with Microsoft Defender for Office 365?
I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking ...
What is your primary use case for Microsoft Defender for Office 365?
My main use cases for Microsoft Defender for Office 365 include email hygiene.
 

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
Tael, Insolar, Goods.ru, Republic of Serbia
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Kaspersky Security for Internet Gateway vs. Microsoft Defender for Office 365 and other solutions. Updated: August 2026.
908,800 professionals have used our research since 2012.