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

"Does a thorough job of examining email and URLs for malicious content."

"Some of the valuable features on the email side are anti-phishing, anti-malware, and Safe Links."

"I would say that 90% of the spam and phishing attack emails get blocked right off the bat."

"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 product is not resource-intensive."

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

"The most valuable feature of Microsoft Defender for Office 365 is data backups that we can provide through ticket requests."

"Scalability-wise, I do not think there are any issues so far."

More Microsoft Defender for Office 365 pros

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

"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."

"The most valuable feature is the straightforward setup."

"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."

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

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

"It's all running in the backend, so it doesn't affect the app functionality."

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

"Online Protection's most valuable feature is its admin interface."

"Microsoft EOP's most valuable feature is a shared mailbox."

"In general, my company is happy with Microsoft support...My company hasn't faced any stability issues with the solution."

"The email policy configuration options in Microsoft EOP are satisfactory."

"It's definitely scalable."

More Microsoft Exchange Online Protection (EOP) pros

Cons

"The XDR dashboard has room for improvement."

"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."

"One area for improvement is support, in terms of being able to reach them and, especially, technical support for configuration."

"The UI needs to be more user-friendly."

"The changes to customer service, specifically the new model for support agreements, are not favorable."

"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."

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

"We are always looking for others tools to increase automation on tasks. There can be better integration with other solutions, such as PowerPoint and email."

More Microsoft Defender for Office 365 cons

"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."

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

"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."

"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."

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

"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 product could be more stable. Microsoft products could be more stable because sometimes, even though they are updating some things, we cannot find those updates."

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

"Some features, like encryption, are not available."

"The reporting needs a little bit of improvement."

"It would be helpful for customers if Plan 1 features were included with EOP."

"Performance and speed should continue to be improved."

"The product's end-of-life cycle could be extended."

"The security features could be better."

More Microsoft Exchange Online Protection (EOP) cons

Pricing and Cost Advice

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

"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."

"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."

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

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

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

"I know that the product is incredibly expensive."

"Defender is a little bit more expensive as compared to others. We are in the manufacturing environment. So, we don't have a high budget for all of our endpoint devices. Its cost is a major concern for us."

More Microsoft Defender for Office 365 pricing and cost advice

"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."

"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."

"It's a high price."

"It is a low-price solution."

"The solution falls on the higher or more expensive side of the spectrum."

"The solution is priced high and could be less expensive compared to other solutions."

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

"The product is bundled with Microsoft 365."

"The price could be lower."

"The tool's pricing is excellent."

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

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

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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)