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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Helped 849,686 peers since 2012

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 May 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.9%, down from 18.3% 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 6.7%, down from 9.1% 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

"The initial setup is straightforward. You just add the license, click it, and then you can set up the rules. It is quite simple."

"Defender for Office 365 has helped eliminate having to look at multiple dashboards and that is the aspect I like most about it. It is simpler, effective, and convenient. The users like the process efficiency."

"Our customers are satisfied with Defender for 365 because Microsoft products are easy to use and customize to meet the client's needs. Everything is in one place, so we can adjust policies as needed for phishing, DLP, ATP, or any other security features that our clients want to apply."

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

"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."

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

"One of the best features of the tool is its capability to aggregate insights from different workloads, basically from the Office 365 and endpoints part."

"There are several features that I consider valuable."

More Microsoft Defender for Office 365 pros

"We have achieved cost savings of up to thirty percent by using 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."

"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."

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

"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."

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

"The product's most valuable feature is third-party integrations."

"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."

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

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

"The initial setup of Microsoft Exchange Online Protection was easy."

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

"I rate Microsoft Exchange Online Protection (EOP) nine out of ten."

"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

"The visibility for the weaknesses in the system and unauthorized access can be improved."

"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."

"They have moved features from one console to another. Things have been moved around in the interface and it takes me time to find where certain features are."

"They can improve their security in a way where a customer can know if all their attachments are safe or not to open through a report. The solution does its job perfectly, but it never reports to the customer whether those attachments have been stopped before or not."

"We need to be able to whitelist data at the backend."

"In some situations, it has not been able to pick impersonated emails having no attachments. Technical support definitely has a scope for improvement."

"Microsoft should provide more documentation for users so they can self-educate. I would like to see more documentation for advanced security features."

"Microsoft Defender for Office 365's Mac functionality requires improvement to deliver the same level of protection found on Windows devices."

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."

"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."

"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."

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

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

"I would like to get reports about vulnerable connections from our clients with information about domains, public IPs, etc. That would be highly useful."

"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."

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

"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."

"The security compliance features need to be improved. Sometimes, a client's mailbox becomes full because of retained information and not because of mail. I would like to see improvement in block rules as well."

"The solution must improve the user experience."

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

"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

"The product is very expensive."

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

"I know that the product is incredibly expensive."

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

"It's a user-base subscription."

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

"The product is expensive."

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

More Microsoft Defender for Office 365 pricing and cost advice

"The solution is not expensive."

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

"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."

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

"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."

"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."

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

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

"Online Protection is fairly expensive."

"It is a low-price solution."

"It's a high price."

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

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849,686 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

14%

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?

Money-wise, it is a part of the Office 365 ( /products/office-365-reviews ) suite, making it slightly more expensive ...

What needs improvement with Microsoft Defender for Office 365?

The main area for improvement is simplifying the implementation and rollout process. There are many conditions to be ...

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

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

Compared 7% of the time

Mimecast Email Security vs Microsoft Defender for Office 365

Compared 5% of the time

Abnormal 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 34% of the time

Barracuda Email Security Gateway vs Kaspersky Security for Mail Server

Compared 13% of the time

Sophos Email vs Kaspersky Security for Mail Server

Compared 10% of the time

Fortinet FortiMail Cloud vs Kaspersky Security for Mail Server

Compared 8% 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 12% 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 10% of the time

Mimecast Email Security vs Microsoft Exchange Online Protection (EOP)

Compared 7% 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)