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 July 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.3%, down from 16.9% compared to the previous year. The mindshare of Kaspersky Security for Mail Server is 0.8%, down from 1.0% compared to the previous year. The mindshare of Microsoft Exchange Online Protection (EOP) is 6.3%, down from 8.8% 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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Amber Worth

General Manager at Ambient iT

Retrieves data from quarantines and easy to read logs with robust security features

Some of the searchability when looking for specifics in Exchange logs is tedious. Although eventually the information is located, it can be difficult if detailed information is lacking. Improving the search process by allowing searches with different types of parameters and facilitating searches within emails would be advantageous. Simplifying interfaces would also be appreciated.

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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

"It gives us visibility into threats and, for endpoints, it helps us to prioritize threats. We used to have a lack of visibility, but now our time to detect and respond has decreased."

"There are several features that I consider valuable."

"The most valuable feature of Microsoft Defender for Office 365 is its spam filter."

"The most valuable feature is the integration. It's a single console, so we don't have to switch around between multiple products. Another valuable feature is the ease of operations and maintenance."

"It also gives the vulnerability status according to the versions you have selected. Let's say you have Google Chrome. It mentions the versions it has, and it updates. Within two hours of an update, it is reflected in the dashboard. That's really nice to have."

"It’s easy to handle integrations, and we don't need a lot of people in our IT team."

"I like its investigation capabilities, as that is what is most important to me. It is fairly simple with a user-friendly interface."

"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."

More Microsoft Defender for Office 365 pros

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

"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."

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

"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."

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

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

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

"We like the holding facility that is available for potentially suspicious URL's. This allows a real-time review to be performed before the email reaches a users inbox."

"We use the solution in all our environments. We use it for remedy tickets and give them updates. It was our main communication point."

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

"It is scalable."

"Microsoft Exchange Online Protection has features like DLP (data loss protection), Safe Attachment, and Safe Links."

"It is easy to configure, easy to use, easy to add exclusions, easy to track, and easy to add anything else if you want."

More Microsoft Exchange Online Protection (EOP) pros

Cons

"Configuring the default strategies and policies in Microsoft Defender for Cloud Apps generates a lot of noise and false positives."

"It would be better if it were more scalable. It depends on the architecture, but we would like to make it more scalable for both data centers."

"The pre-sales cost calculations could be more transparent."

"In the areas of improvement for Microsoft Defender for Office 365, the console is the biggest challenge for me."

"We noticed that from time to time, Microsoft's stability does have problems. Sometimes the service goes up and down. Sometimes they change without prior notice."

"The product must provide better malware detection."

"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."

"There is a different console for different things; I just want one consolidated console."

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."

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

"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."

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

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

"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 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 tool's classification for bulk email is cumbersome."

"The solution must improve the user experience."

"Not all settings can be configured automatically and most still require manual configuration. However, there is an automation tool available that can be used to input all the configurations either as a script or a tool it would be helpful."

"It wasn't easy or intuitive enough for me to start using it. So, the reason was that the solution changed."

"We have experienced issues while migrating from on-prem to the cloud. The tool needs to improve its stability."

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

"Some of the searchability when looking for specifics in Exchange logs is tedious."

"Having orchestration features added to Microsoft Exchange Online Protection, particularly automation and remediation, would be quite useful."

More Microsoft Exchange Online Protection (EOP) cons

Pricing and Cost Advice

"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."

"It's a user-base subscription."

"The pricing has become expensive."

"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."

"The product is expensive."

"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."

"The product is very expensive."

"I was working in the government and it was too expensive for us to use our Microsoft products."

More Microsoft Defender for Office 365 pricing and cost advice

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

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

"The solution is not expensive."

"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."

"It's a high price."

"The price could be lower."

"The pricing of the solution is reasonable."

"Microsoft Exchange Online Protection is a good solution at an affordable price. It is a good investment."

"On a scale of one to ten, where one is cheap, and ten is very expensive, I rate the pricing a six. For licensing, we can make monthly or yearly payments. Right now, we pay 5 USD per month to secure a person's license."

"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 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 product's pricing is competitive for the US market."

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

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860,592 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Computer Software Company

16%

Financial Services Firm

Manufacturing Company

Government

Computer Software Company

13%

Financial Services Firm

12%

University

10%

Retailer

Computer Software Company

15%

Financial Services Firm

Government

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?

Microsoft is quite affordable with a lot of features available for any size organization.

What needs improvement with Microsoft Defender for Office 365?

Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS recor...

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?

I would like to improve the setting of rules in Microsoft Exchange Online Protection (EOP) as it is currently working...

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

I am using Microsoft Exchange Online Protection (EOP) ( /products/microsoft-exchange-online-protection-eop-reviews ) ...

Proofpoint Email Protection vs Microsoft Defender for Office 365

Comparisons

Compared 13% of the time

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

Compared 7% of the time

Barracuda Email Protection vs Microsoft Defender for Office 365

Compared 6% of the time

Mimecast Email Security vs Microsoft Defender for Office 365

Compared 5% of the time

Cisco Secure Email vs Microsoft Defender for Office 365

Compared 4% of the time

More Microsoft Defender for Office 365 Competitors

Fortinet FortiMail vs Kaspersky Security for Mail Server

Compared 31% of the time

Fortinet FortiMail Cloud vs Kaspersky Security for Mail Server

Compared 11% of the time

Security Gateway vs Kaspersky Security for Mail Server

Compared 11% of the time

Barracuda Email Security Gateway vs Kaspersky Security for Mail Server

Compared 10% of the time

Check Point Harmony Email & Collaboration 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 11% of the time

Cisco Secure Email vs Microsoft Exchange Online Protection (EOP)

Compared 10% of the time

Fortinet FortiMail vs Microsoft Exchange Online Protection (EOP)

Compared 10% of the time

Mimecast Email Security vs Microsoft Exchange Online Protection (EOP)

Compared 7% of the time

Barracuda Email Security 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)