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Darktrace vs Heimdal Email Security comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Mar 9, 2025

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...
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Ranking in Email Security
1st
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
49
Ranking in other categories
Advanced Threat Protection (ATP) (1st), Microsoft Security Suite (11th)
Darktrace
Ranking in Email Security
9th
Average Rating
8.2
Reviews Sentiment
7.2
Number of Reviews
79
Ranking in other categories
Intrusion Detection and Prevention Software (IDPS) (1st), Network Traffic Analysis (NTA) (1st), Network Detection and Response (NDR) (1st), Extended Detection and Response (XDR) (6th), AI-Powered Chatbots (2nd), Cloud Security Posture Management (CSPM) (15th), Cloud-Native Application Protection Platforms (CNAPP) (12th), Attack Surface Management (ASM) (3rd), AI-Powered Cybersecurity Platforms (2nd)
Heimdal Email Security
Ranking in Email Security
62nd
Average Rating
9.0
Reviews Sentiment
7.9
Number of Reviews
1
Ranking in other categories
Fraud Detection and Prevention (67th)
 

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 Darktrace is 3.1%, up from 1.1% compared to the previous year. The mindshare of Heimdal Email Security is 0.2%, up from 0.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security
 

Featured Reviews

Tolu Omolaja - PeerSpot reviewer
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.
Peter-Murphy - PeerSpot reviewer
Enables proactive threat detection and immediate response through AI monitoring
The most valuable feature of Darktrace is its ability to detect and counter threats before they occur. The autonomous response capability is always enabled, blocking threats immediately without hesitation. Additionally, the Darktrace email platform is a significant asset since it addresses incoming threats before they reach the network, enhancing our security measures. Protecting the business is essential, and ensuring security through 24/7 AI monitoring is invaluable.
Melvin Ong - PeerSpot reviewer
Straightforward to set up, reliable, and offers good functionality
We primarily use the solution for email security and general email management.  It's improved our productivity.  The solution works well overall. The functionality is very good.  The setup process is easy.  It is stable and reliable. It's scalable.  I don't have any specific areas that need…

Quotes from Members

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

Pros

"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."
"Does a thorough job of examining email and URLs for malicious content."
"Microsoft Defender for Office 365 facilitates efficient management and updates through the cloud. We do not have to worry about incompatibilities. It just works."
"The deployment capability is a great feature."
"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"The good part is that you don't have to configure it, which is very convenient."
"The product's scalability is good."
"I would say that 90% of the spam and phishing attack emails get blocked right off the bat."
"I have used multiple solutions, but its graphical user interface is quite interesting and quite descriptive. There are a lot of video animations, and we can easily see how the data is transferred between various points. That's something really interesting. It is also quite easy to understand for a new user."
"The features that are most valuable to me include detection, response with analytics, and network detection."
"The platform has many modules, and each module examines a different situation in the behavior."
"The autonomous response is also highly designed in Darktrace."
"I find it very good in the way that they show the past events, including the attack history."
"The investigative part of Darktrace is valuable, especially the automation features. It allows setting up checks and provides guidance on mitigating situations, which is very useful. There are different modules that you can add to the console for protection."
"The most valuable feature of this solution is that it does not require human intervention to eliminate a threat."
"The Antigena feature is most valuable. Once it learns your environment, Antigena can step in and block a denial of service attack, a ransomware attack, or just about anything that doesn't belong in the environment. It can detect any type of attack that hits the environment because it understands what normal looks like for the network. It is very useful for an autonomous response."
"It is stable and reliable."
 

Cons

"Microsoft sometimes has downtime, and we'll get several incidents coming in back to back. We have a huge backlog of notifications, many of which may be false positives. However, there might be serious alerts, so we can't risk dismissing all of them at once."
"Microsoft Defender for Office 365 should be more proactive."
"We need to be able to whitelist data at the backend."
"The changes to customer service, specifically the new model for support agreements, are not favorable."
"There's room for improvement regarding the time frame for retrieving emails."
"The XDR dashboard has room for improvement."
"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."
"There is room for improvement in terms of reporting."
"Darktrace is a closed technology, meaning we know very little about how it works, including the architecture, which is significant. As a result, when we implement the system and find we're getting many false positives, we have minimal insight into why it's happening and what we can do to fix it. We don't know how the solution is configured, the criteria for threats to be determined, or the product's inner workings. We understand that they have to ensure privacy and their copyright, but we want to see some documentation or public research into the security Darktrace provides."
"This is quite an expensive product so the pricing is something that can be improved."
"The price point for the product was too high for what our possible use case could be."
"The interface is too mathematical and it should be simplified."
"Darktrace needs significant improvement in its notification capabilities."
"Needs to improve its collaboration with local partners."
"One thing I would like is for Darktrace to flag SMB traffic more accurately. Currently, it only flags that SMB traffic has occurred, but it doesn't specify which file was being transferred. This makes it difficult to investigate incidents involving SMB traffic, as we don't have concrete evidence of what was being sent."
"The solution's user interface and stability could be improved."
"The solution could be less expensive."
 

Pricing and Cost Advice

"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"The pricing has become 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."
"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 pricing is normal. Considering its popularity, it's not overpriced."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"It's a user-base subscription."
"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 pricing is subscription-based and it is high."
"It was $3,600 a month or $2,000 plus or so. I am not sure. Its licensing is pretty simple."
"The cost of the solution is expensive for smaller businesses. They will not be able to afford it or might not need this type of security solution."
"Darktrace is quite an expensive solution."
"Darktrace is pricey, but the price is reasonable for what the solution does, and it's comparable to other products."
"This solution is expensive."
"All of the other modules, such as the licensing modules, are on par. It's one for one."
"The pricing is reasonable."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
8%
Manufacturing Company
8%
Government
6%
Computer Software Company
14%
Manufacturing Company
8%
Financial Services Firm
8%
Government
7%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

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 ...
How does Crowdstrike Falcon compare with Darktrace?
Both of these products perform similarly and have many outstanding attributes. CrowdStrike Falcon offers an amazing u...
Which is better - SentinelOne or Darktrace?
Which solution is better depends on which is more suitable specifically for your company. Darktrace, for example, is ...
What do you like most about Darktrace?
A very useful feature in Darktrace for real-time threat analysis is the packet inspection that analyzes the packet tr...
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Also Known As

MS Defender for Office 365
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MailSentry
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Irwin Mitchell, Open Energi, Wellcome Trust, FirstGroup plc, Virgin Trains, Drax, QUI! Group, DNK, CreaCard, Macrosynergy, Sisley, William Hill plc, Toyota Canada, Royal British Legion, Vitol, Allianz, KKR, AIRBUS, dpd, Billabong, Mclaren Group.
Brother, Symbion, CPH West
Find out what your peers are saying about Microsoft, Proofpoint, Cisco and others in Email Security. Updated: April 2025.
849,963 professionals have used our research since 2012.