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Heimdal Email Security vs IRONSCALES comparison

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Executive Summary

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
52
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (10th), Secure Email Gateway (SEG) (1st)
Heimdal Email Security
Ranking in Email Security
65th
Average Rating
9.0
Reviews Sentiment
7.9
Number of Reviews
1
Ranking in other categories
Fraud Detection and Prevention (72nd)
IRONSCALES
Ranking in Email Security
17th
Average Rating
9.2
Reviews Sentiment
7.6
Number of Reviews
13
Ranking in other categories
Advanced Threat Protection (ATP) (20th), Secure Email Gateway (SEG) (8th)
 

Mindshare comparison

As of June 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.6%, down from 17.6% compared to the previous year. The mindshare of Heimdal Email Security is 0.2%, up from 0.1% compared to the previous year. The mindshare of IRONSCALES is 1.8%, down from 2.4% 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.
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…
Orion Trist - PeerSpot reviewer
Saved us a big deal by catching malicious links and attachments sent directly to our staff and has also been helpful for educating our staff
It has helped immensely because it has gotten rid of malicious links and malicious attachments that have been targeted at our different staff members. It has definitely protected us on more than one occasion. Their integrated approach of combining email security and employee awareness training is excellent because the training is a reminder for staff to continually be on their feet and look out for the ever-changing landscape. It also lets us know who has been trained, who hasn't been trained, and what they're like. It integrates a risk ratio for all our employees. Its artificial intelligence and machine learning capabilities are very important because I don't want to have to manage 24/7. Having the AI to do a lot of the work for me is invaluable. Its automated detection and response capabilities are excellent. It does a wonderful job. They provide all the stats on what it has done. It gives you information about how much time is saved and all that kind of good information. Its automated detection and response capabilities have massively decreased the time we spend manually reviewing email events. Since May, it has taken care of 170 hours. So, it has saved 88 hours per analyst. It is very good in terms of the customization of the automated detection and response capabilities. It is granular, and you can adjust it however you want. If it is too high, you can turn it down. If it is too low, you can turn it up.

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."
"The ability to respond to threats if very important."
"My experience deploying Microsoft Defender for Office 365 was seamless."
"Does a thorough job of examining email and URLs for malicious content."
"Scalability-wise, I do not think there are any issues so far."
"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."
"The most valuable feature of Microsoft Defender for Office 365 is data backups that we can provide through ticket requests."
"The product's scalability is good."
"It is stable and reliable."
"AI-driven phishing detection and incident remediation are valuable. It saves time from having to do manual analysis and investigation, and we also get alerts for phishing emails."
"For me, the mobile app is most valuable. All other features are also very useful, but the mobile app makes it really easy for me to manage on the go. I don't have to be at my desk. I could be at the shops, or it could be in the evening when I am out, and I can get a notification on my phone that there is an incident that has been raised. I can sort it out very quickly without having to be at my work PC."
"The solution captures a bit more of the unknown, quantifies it, and applies intelligence to it to pick out and stop a lot of phishing emails that come through."
"There is buzz around phishing awareness training. When I make a campaign, all of a sudden people in our organization are talking, thinking, and wondering about it. Therefore, it keeps people on their toes. That is perfect because it does exactly what we want it to do."
"For what was being offered with IRONSCALES, I feel like we got an incredible deal."
"I would say the most valuable feature is what they call Themis. It's like a virtual analyst that uses the decisions that system admins make to generate a score for whether an email is legitimate, spam, or phishing. It gets better based on the decisions that we make over time. The automation piece is great as well. The integrated approach of email security combined with employee awareness training is excellent."
"The most valuable features of the solution are that it is easy to set it up, install, and manage the product."
"It is a totally stable solution."
 

Cons

"In some situations, it has not been able to pick impersonated emails having no attachments. Technical support definitely has a scope for improvement."
"I am generally satisfied with how it currently is. If I could improve anything, I would reduce the cost."
"The visibility into threats is not up to the mark, as I do not have control. I rate my experience with Microsoft Defender for Office 365 as six out of ten due to troubleshooting and pricing concerns."
"The custom alerts have to improve a lot."
"In the areas of improvement for Microsoft Defender for Office 365, the console is the biggest challenge for me."
"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."
"The changes to customer service, specifically the new model for support agreements, are not favorable."
"Too many false positives and lacks an accurate capability to detect malicious SharePoint sites."
"The solution could be less expensive."
"The only thing that I could say is that some of the reporting features could be better."
"There's room for improvement in the campaign management. IRONSCALES has many built-in templates that I use, but you can also build templates from scratch. However, the interface for creating custom templates needs to be updated."
"Even though they have been continuously improving it, it is not 100% there. We have had a few incidents where legitimate emails were getting blocked, and we had to manually remove those emails from quarantine. It is 90% effective or accurate because, on rare occasions, some emails from customers were not getting delivered. In one or two instances, their emails got blocked by IRONSCALES, and we had to manually remove the emails from quarantine. I would like them to improve their algorithm to avoid flagging genuine emails as malicious. I would also like to be able to whitelist certain email addresses. I'd love to be able to whitelist a particular customer."
"I think the tool can continue to hone the product to ensure the detections are accurate."
"I would love to see the indication of compromise and how the solution utilizes open source resources. It would be good to see that included in the paid versions. It would be a small addition but add a lot of value for clients."
"The tool supports 15 to 16 languages, but the content it uses in the training in Spanish has certain limitations."
"There is a feature called Account Takeover, which isn't what I want it to be able to do. I know that they're working on that, but when they first started the Account Takeover feature in incident management, it didn't have much information. It didn't have any usability to it. I already had tools in place that were better."
"The integration with Google Suite needs to be better. it's something they can work on."
 

Pricing and Cost Advice

"It's a user-base subscription."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
Information not available
"There is an installation cost. Since we have this as a managed service, we pay for licensing and the managed service itself. Other than that, there are no additional costs."
"Considering the value it provides, it is definitely worth the cost. We don't have to do manual analysis and remediation of phishing emails, which saves us a lot of hours. Its licensing is based on the number of users being supported and the number of email addresses being protected. I'm not aware of any additional costs."
"IRONSCALES is an expensive solution."
"The product is available as a middle-priced tool. I think it is not the cheapest solution."
"They are pretty much the same as all the other competitors in the market."
"We pay $3000 plus a little more a year for the number of employees we have, and we're not even that big. The solution is at the higher end in terms of cost. It's not the most expensive product, but I would say it's worth the price if you have a high volume of email traffic. In our case, the solution has inspected over 162,000 emails between three and four months. It saved us a lot of time and money. It's a worthwhile investment because a bad actor only has to succeed once; we must defend against everything in our business. IRONSCALES offers a sense of security and confidence from being well protected."
"As compared to everything else we looked at, it was good. It was the best value for the dollars."
"I don't know about its pricing because I don't run the budget or pay the bills, but if it was extortionate, we probably would be looking to scrap it, and because we are not, I assume its price is okay."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
9%
Manufacturing Company
8%
Government
6%
No data available
Computer Software Company
19%
Manufacturing Company
8%
Financial Services Firm
6%
University
6%
 

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?
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...
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What do you like most about IRONSCALES?
The solution captures a bit more of the unknown, quantifies it, and applies intelligence to it to pick out and stop a...
What is your experience regarding pricing and costs for IRONSCALES?
The product is available as a middle-priced tool. I think it is not the cheapest solution. There are other solutions ...
What needs improvement with IRONSCALES?
I think maybe on the side of the awareness training, the tool can improve a little more information and have some oth...
 

Also Known As

MS Defender for Office 365
MailSentry
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Brother, Symbion, CPH West
Allegheny Millwork, Ayrshire College, Nium, Orris, Paramount School District, Pres Les, PRT Staffing, Recovery Unplugged, Telit, WebHelp
Find out what your peers are saying about Microsoft, Proofpoint, Cisco and others in Email Security. Updated: June 2025.
856,873 professionals have used our research since 2012.