Kaspersky Security for Mail Server vs Microsoft Exchange Online Protection (EOP) comparison

Kaspersky Security for Mail Server vs. Microsoft Exchange Online Protection (EOP)

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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

Microsoft Defender for Offi...

Mindshare comparison

As of April 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 13.1%, down from 19.0% compared to the previous year. The mindshare of Kaspersky Security for Mail Server is 0.9%, down from 1.0% compared to the previous year. The mindshare of Microsoft Exchange Online Protection (EOP) is 6.8%, down from 9.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Security

Featured Reviews

Tolu Omolaja

Head of Department of Network Communications at Eko electricity

Great URL scanning and attachment scanning, but I would like more proactive threat analysis

The two main features that prove most beneficial for us are URL scanning and attachment scanning. URL scanning involves an automatic scan of links and emails. When a user clicks on a link within an email, the system promptly checks the link's safety. If the link is deemed safe, access is granted automatically. However, if it is flagged as unsafe, we receive feedback and notification to caution us about the potentially harmful link. At this point, we are presented with the option to proceed or return. I have personally witnessed the system identify a few unsafe links, making this the primary advantage of using the solution. The second crucial aspect is the scanning of attachments. When an email containing an attachment arrives, we receive a notification of the new email, along with information that the attachment is being scanned for threats. This additional layer of security provides peace of mind for our organization. While Microsoft Defender for Office 365 offers numerous features, these two stand out as particularly impressive and valuable to us.

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Taha Khaleel

Chief Operations Officer at PRO-VISION

A highly reliable solution that provides monitoring capabilities and protection to multiple types of devices

The initial setup of Kaspersky Security for Mail Server is very easy. The initial setup of Kaspersky Security for Mail Server takes around four minutes. The solution is deployed on the cloud and on-premises. For the deployment process, you can buy the solution in a CD form or purchase it directly from the company website and activate it. My company needs managers, engineers, and developers to deploy the solution. The number of people required for the deployment process changes from time to time, so all the staff are included not just for the deployment of the solution but also to make improvements to the solution in the future. You can contact Kaspersky to see if they can provide the solution with integration capabilities for your company by providing you with an open account, which I haven't tried yet, though I plan to try it in the future.

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Nur Mohammad

Deputy Manager at B-Trac Technologies Ltd.

An effective email security solution that provides DLP, Safe Attachment, and Safe Links

If you want extensive email security, you need to purchase a Plan 2 license. Plan 1 and Plan 2 are the two plans for Microsoft Exchange Online Protection. Some customers hesitate to purchase this product because it adds some costs to them, which is necessary for them. It would be helpful for customers if Plan 1 features were included with EOP. However, they still need to purchase Plan 2 for advanced security features. One of our clients recently requested to compare Zimbra's features with Microsoft Exchange Online Protection. Zimbra is open source, while Microsoft Exchange Online Protection is not. When I compare both the products, many free features are available in Zimbra because it is open-source software. It makes no sense to request Microsoft Exchange Online Protection add all the features people get on open-source software like Zimbra. Hence, I would say whatever features Microsoft Exchange Online Protection has are enough. Microsoft has a dedicated research team that should research and add new techniques like phishing and spamming solutions to the product.

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Quotes from Members

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

Pros

"There are several features that I consider valuable."

"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."

"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 solution is very easy to use. All you have to do is to assign the license to the end-user and it's done. The customer will only have the feature activated, and the solution will monitor the emails to determine if they are a threat or not."

"The technical support is good and quick to resolve issues."

"Since we have started using the solution, there have been fewer compromises."

"Microsoft Defender for Office 365 is a stable solution."

"Microsoft Defender has a feature to protect each and every attachment. Even if it's an encrypted attachment, it will check for any potential threats."

More Microsoft Defender for Office 365 pros

"I find the product valuable because it provides easy integration with other platforms like Fortinet firewalls."

"The integration rate is very high in Kaspersky, which is why most of our customers like it."

"The most valuable feature of the solution stems from the fact that it is a highly reliable and dependable solution."

"The most valuable feature is the straightforward setup."

"You can install the plugins on the same machine hosting your exchange solution. It's a good complement for Sophos security, which scans the traffic before it reaches your mail service. Kaspersky is on the mail server itself while Sophos handles the incoming traffic. With both of them working together, we have the perfect solution for mail."

"We have achieved cost savings of up to thirty percent by using Kaspersky Security for Mail Server."

"The most valuable features are the anti-phishing and anti-spam capabilities."

"It has a really nice web-based administration console."

"You can use the product to create special accounts."

"It offers great security against malware and other threats."

"The security features provided by Microsoft are robust."

"The threat management feature includes policies and alerts that are valuable."

"It is an easy solution."

"Microsoft Exchange Online Protection (EOP) is the best email solution with more features and robust security, making it ideal for corporate use."

"The solution's stability is very, very good. I didn't face any problems in the last year."

More Microsoft Exchange Online Protection (EOP) pros

Cons

"I'd like some additional features any product can give me to protect our environment in a better way."

"I am generally satisfied with how it currently is. If I could improve anything, I would reduce the cost."

"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."

"Microsoft Defender for Office 365 should be more proactive."

"The product must provide better malware detection."

"Sometimes, phishing emails manage to pass through the filter, so the system needs to enhance its phishing email detection capabilities."

"Microsoft Defender for Office 365 should improve the troubleshooting tools. It's unclear whether the device is blocked at the firewall level or at the device itself. The granularity needed for troubleshooting is currently lacking. From my perspective, Microsoft should address this issue to benefit many users who likely share the same sentiment."

"Microsoft Defender for Office 365 could improve by giving customers information on techniques to prevent threats. For example, information about best practices on how to protect their own devices against hackers and scammers, such as educational information or training. This would help others have a better understanding of cyber security. Additionally, there can be more security features added."

More Microsoft Defender for Office 365 cons

"The biggest problem in the solution is related to its license renewal since it is pretty hard in Kaspersky to find out the procedure to renew a license."

"Encrypted email attachments are not being monitored by this solution, which is an area that they need to work on."

"I rated the overall solution a five out of ten. If a user is looking for a low-budget solution with mid-level security without AI features, Kaspersky Security for Mail Server is suitable."

"The solution is not 100 percent stable and that can use improvement."

"It would be great if Kaspersky could do what Sophos does for us. However, we love having these two different technologies doing the same thing. Sometimes Sophos has the patch to block a novel threat, but Kaspersky doesn't."

"I have only made contact via email, and it is a little slow. I would give customer service a rating of six or seven. Improving Spanish support would greatly benefit users."

"Kaspersky lacks in the area of customization, so simpler customization options need to be provided to users."

"When you're using a Microsoft product solution, you can scale it, but if you're not, there are limitations."

"Microsoft has some training portals, but more could be developed."

"The management interface of Microsoft Exchange Online Protection (EOP) could be intuitive."

"Our company faces difficulty with Microsoft Exchange Online Protection (EOP) because it's too big, clunky, and difficult for a small client to implement quickly and easily."

"When the product is being updated, it changes some of the setups. The support team is also not good."

"The licensing can be on the expensive side, especially in the cloud space."

"The biggest issue that I experience is that Microsoft keeps moving things around, and it's very inconsistent as to where you find the information when you're trying to work on different pieces."

"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."

More Microsoft Exchange Online Protection (EOP) cons

Pricing and Cost Advice

"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."

"It's a user-base subscription."

"The license is expensive because the cost is based on the number of users."

"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."

"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."

"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."

"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."

"The pricing is normal. Considering its popularity, it's not overpriced."

More Microsoft Defender for Office 365 pricing and cost advice

"The solution offers one of the best prices possible to its users, making it even better than Barracuda. Kaspersky Security for Mail Server is ten times cheaper than Barracuda."

"My company makes annual payments towards the licensing costs solution."

"Price-wise, I would rate this product a four out of five. It could be a bit cheaper."

"The solution is not expensive."

"Microsoft Exchange Online Protection's pricing is a little bit more because its price has recently increased."

"The solution's pricing is subscription-based rather than a yearly licensing cost. Pricing is based on the size of the environment and company and can be expensive."

"The price could be lower."

"Regarding the price, it's comparable to other service providers. We've also looked at Check Point's offerings, and the pricing doesn't seem to be an issue."

"Apart from the license fee for the solution, there are no additional costs."

"The pricing of the solution is reasonable."

"The price of Microsoft Exchange Online Protection is reasonable."

"The solution should reduce the cost."

More Microsoft Exchange Online Protection (EOP) pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

16%

Financial Services Firm

Manufacturing Company

Government

Computer Software Company

16%

Financial Services Firm

13%

University

Manufacturing Company

Computer Software Company

15%

Government

Financial Services Firm

Manufacturing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

Questions from the Community

What do you like most about Microsoft Defender for Office 365?

Threat Explorer is an invaluable tool for me, and it plays a crucial role in helping me discern the origins of variou...

What is your experience regarding pricing and costs for Microsoft Defender for Office 365?

I don't have detailed specifics on pricing, setup cost, or licensing.

What needs improvement with Microsoft Defender for Office 365?

I am generally satisfied with how it currently is. If I could improve anything, I would reduce the cost.

What do you like most about Kaspersky Security for Mail Server?

The most valuable feature of the solution stems from the fact that it is a highly reliable and dependable solution.

What is your experience regarding pricing and costs for Kaspersky Security for Mail Server?

The pricing is moderate. It is not expensive but not cheap either. For Mexico, a good price is about 20 dollars per a...

What needs improvement with Kaspersky Security for Mail Server?

I believe integration with other platforms like Fortinet firewalls and a feature similar to a SIEM ( /categories/secu...

What do you like most about Microsoft Exchange Online Protection?

The initial setup was easy. The configuration process is very straightforward.

What needs improvement with Microsoft Exchange Online Protection?

Some of the searchability when looking for specifics in Exchange logs is tedious. Although eventually the information...

What is your primary use case for Microsoft Exchange Online Protection?

I use the tools to protect customers' emails, mostly utilizing Defender products to protect emails and links from Sha...

Proofpoint Email Protection vs Microsoft Defender for Office 365

Comparisons

Compared 14% of the time

Check Point Harmony Email & Collaboration vs Microsoft Defender for Office 365

Compared 7% of the time

Hornetsecurity 365 Total Protection vs Microsoft Defender for Office 365

Compared 5% of the time

Mimecast Email Security vs Microsoft Defender for Office 365

Compared 5% of the time

Trend Micro Email Security vs Microsoft Defender for Office 365

Compared 4% of the time

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Fortinet FortiMail vs Kaspersky Security for Mail Server

Compared 30% of the time

Barracuda Email Security Gateway vs Kaspersky Security for Mail Server

Compared 15% of the time

Sophos Email vs Kaspersky Security for Mail Server

Compared 9% of the time

Security Gateway vs Kaspersky Security for Mail Server

Compared 7% of the time

Fortinet FortiMail Cloud vs Kaspersky Security for Mail Server

Compared 7% of the time

More Kaspersky Security for Mail Server Competitors

Proofpoint Email Protection vs Microsoft Exchange Online Protection (EOP)

Compared 13% of the time

Cisco Secure Email vs Microsoft Exchange Online Protection (EOP)

Compared 11% of the time

Fortinet FortiMail vs Microsoft Exchange Online Protection (EOP)

Compared 9% of the time

Mimecast Email Security vs Microsoft Exchange Online Protection (EOP)

Compared 6% of the time

Symantec Messaging Gateway vs Microsoft Exchange Online Protection (EOP)

Compared 4% of the time

More Microsoft Exchange Online Protection (EOP) Competitors

Product Reports

Microsoft Defender for Office 365

Download Microsoft Defender for Office 365 product report

Microsoft Defender for Office 365 report

Email Security

Download Kaspersky Security for Mail Server product report

Kaspersky Security for Mail Server report

Microsoft Exchange Online Protection (EOP)

Download Microsoft Exchange Online Protection (EOP) product report

Microsoft Exchange Online Protection (EOP) report

Also Known As

MS Defender for Office 365

No data available

Microsoft EOP, MS Exchange Online Protection

Overview

Microsoft Defender for Office 365 is a comprehensive security solution designed to protect organizations against advanced threats in their email, collaboration, and productivity environments. It combines the power of Microsoft's threat intelligence, machine learning, and behavioral analytics to provide real-time protection against phishing, malware, ransomware, and other malicious attacks.

With Microsoft Defender for Office 365, organizations can safeguard their email communication by detecting and blocking malicious links, attachments, and unsafe email content. It employs advanced anti-phishing capabilities to identify and prevent sophisticated phishing attacks that attempt to steal sensitive information or compromise user credentials.

This solution also offers robust protection against malware and ransomware. It leverages machine learning algorithms to analyze email attachments and URLs in real-time, identifying and blocking malicious content before it reaches users' inboxes. Additionally, it provides advanced threat-hunting capabilities, allowing security teams to proactively investigate and respond to potential threats.

Microsoft Defender for Office 365 goes beyond email protection and extends its security features to other collaboration tools like SharePoint, OneDrive, and Teams. It scans files and documents stored in these platforms, ensuring that they are free from malware and other malicious content. It also provides visibility into user activities, helping organizations detect and mitigate insider threats.

Furthermore, this solution offers rich reporting and analytics capabilities, providing organizations with insights into their security posture and threat landscape. It enables security administrators to monitor and manage security incidents, track trends, and take proactive measures to enhance their overall security posture.

Microsoft

Email is the number one vector used by cybercriminals to penetrate and attack enterprise IT systems.

Kaspersky Security for Mail Server uses Next Generation technologies including advanced heuristics, machine learning and sandboxing to detect and protect against ransomware, spam, phishing, data loss and even unknown threats penetrating your IT systems through emails and malicious attachments.

Kaspersky

Microsoft Exchange Online Protection (EOP) is a comprehensive email filtering and security service designed to protect organizations from spam, malware, and other email-based threats. It provides advanced threat protection, anti-malware and anti-spam filtering, and data loss prevention capabilities.

With EOP, organizations can ensure the security and integrity of their email communications. It uses multiple layers of filtering and scanning to detect and block malicious content, including phishing attempts, viruses, and ransomware. EOP also leverages machine learning and artificial intelligence to continuously improve its threat detection capabilities.

In addition to its robust security features, EOP offers advanced anti-spam filtering to reduce unwanted and unsolicited emails. It uses a combination of reputation-based filtering, content filtering, and sender authentication techniques to identify and block spam messages.

EOP also includes data loss prevention (DLP) capabilities to prevent sensitive information from being leaked or shared inappropriately. It allows organizations to define policies to detect and prevent the transmission of sensitive data, such as credit card numbers or social security numbers, via email.

Furthermore, EOP integrates seamlessly with Microsoft Exchange Online and other Office 365 services, providing a unified and integrated email security solution. It can be easily managed through the Exchange admin center, allowing administrators to configure and monitor security settings, review reports, and manage quarantined emails.

Microsoft

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.

Vimpel Com, Estrella Galicia, Krombacher

Information Not Available

Kaspersky Security for Mail Server vs. Microsoft Exchange Online Protection (EOP)