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Fortinet FortiMail vs Sublime Security comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

ROI

Sentiment score
6.4
Fortinet FortiMail enhances email security with cost savings, reduced spam, efficient management, robust features, and improved productivity.
Sentiment score
4.4
Sublime Security cuts fraud and costs, speeds up email investigations, and reduces phishing risks with automatic analysis.
It offers cost savings compared to Cisco, which was very expensive.
System admin at Environment Fund
Importantly, we didn’t need to hire any additional staff; we were able to absorb this responsibility using our existing team.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Customer Service

Sentiment score
6.5
Fortinet FortiMail support is praised for responsiveness and expertise but criticized for variability based on region and tier.
Sentiment score
6.4
Sublime Security is praised for responsive, knowledgeable support, efficient setup, and effective communication, leading to positive client feedback.
I have direct communication with Kenyan system engineers and local support in Ethiopia, enabling good support.
CTO at Malam Engineering PLC
Mainly, they are focusing on Fortinet FortiMail and FortiAnalyzer, where the support engineers are very good.
Head of the IT Security Division at a tech services company with 11-50 employees
Fortinet's technical support offers high-quality support.
System admin at Environment Fund
We were able to get in touch with the person who constructed the LLM and its agentic aspects relatively quickly to address our questions.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Scalability Issues

Sentiment score
7.1
Fortinet FortiMail is scalable for various environments, suitable for mid-sized to enterprise users with virtual and on-premise options.
Sentiment score
7.4
Sublime Security excels in scalability, efficiently handling large volumes and threats with minimal resource use and seamless expansion.
The scalability of Fortinet FortiMail depends on whether you are buying a virtualized license, which allows for a scalable pay-as-you-go model, or if you are buying a box.
Head of the IT Security Division at a tech services company with 11-50 employees
Fortinet FortiMail is scalable and can be expanded in large environments.
Senior Cybersecurity Engineer at Kyndryl
Despite nearly doubling the number of mailboxes and adding significantly more detection rules, the service remains just as fast as it was when we first implemented it.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Stability Issues

Sentiment score
8.3
Fortinet FortiMail is highly rated for stability, reliability, effective spam handling, and seamless integration, requiring minimal fine-tuning.
Sentiment score
8.7
Sublime Security is praised for its exceptional stability, efficient performance, and reliable infrastructure, effectively satisfying demanding client expectations.
This stability is consistent across Fortinet products, including FortiGate firewall.
CTO at Malam Engineering PLC
Sublime Security acted quickly; once Microsoft alerted Outlook about the incoming email, Sublime Security managed to pull it from the stream before it had a chance to appear in the user's inbox.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Room For Improvement

Fortinet FortiMail requires interface refinement, improved features, better documentation, and enhanced integration with advanced threat detection and Fortinet’s ecosystem.
Sublime Security needs better reporting, integration, documentation, pricing, threat visibility, customization, automation, and performance to attract more users.
Providing comprehensive documentation on how to deploy and configure would improve the solution.
CTO at Malam Engineering PLC
The transition from on-premises devices to virtual appliances may be necessary as more organizations migrate email services to the cloud.
Head of computer systems at Indian Institute of Space Science & Technology(IIST)
There are also false positives issues, especially with signed PDF attachments.
Senior Cybersecurity Engineer at Kyndryl
While they do provide API-level access and web hooks, I believe more out-of-the-box integrations with SOAR platforms and SIEM tools would enhance Sublime's value.
Manager Security Operations Center at a educational organization with 10,001+ employees
One breach could potentially put a small company out of business, so having a tool such as this might save them from that fate.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
 

Setup Cost

Fortinet FortiMail offers competitive appliance-based pricing, with flexibility and reliability, though higher than open-source alternatives.
Enterprise buyers find Sublime Security competitively priced on AWS Marketplace, offering good value despite slightly higher costs than some alternatives.
Fortinet FortiMail is considered overpriced by Indian rupee standards.
Head of computer systems at Indian Institute of Space Science & Technology(IIST)
The setup cost is a little bit costly.
Senior Cybersecurity Engineer at Kyndryl
It's competitive with its peers, especially for the number of mailboxes we have.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Valuable Features

Fortinet FortiMail provides strong security, usability, scalability, and performance for email threat detection and content control in diverse environments.
Sublime Security enhances email protection with AI-driven phishing detection, customizable rules, and seamless integration with Microsoft and Google.
Its threat detection capabilities have been beneficial.
System admin at Environment Fund
The most valuable features are Fortinet FortiMail's ability to protect from advanced features of email-based attacks, including protection against ransomware and malware attacks.
CTO at Malam Engineering PLC
Fortinet FortiMail offers capabilities like settings for mail delivery, mail filtering, spam controls, and email bursting prevention.
Head of computer systems at Indian Institute of Space Science & Technology(IIST)
This level of detail is essential for analysts and anyone conducting evaluations, as it helps them understand the specific circumstances of their environment.
Manager Security Operations Center at a educational organization with 10,001+ employees
It adds a smarter layer that catches anything missed by Microsoft 365 or Google Workspace protection.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
 

Categories and Ranking

Fortinet FortiMail
Ranking in Email Security
5th
Average Rating
8.6
Reviews Sentiment
6.8
Number of Reviews
68
Ranking in other categories
No ranking in other categories
Sublime Security
Ranking in Email Security
19th
Average Rating
9.0
Reviews Sentiment
6.6
Number of Reviews
4
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Email Security category, the mindshare of Fortinet FortiMail is 2.7%, down from 4.0% compared to the previous year. The mindshare of Sublime Security is 1.2%, down from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Fortinet FortiMail2.7%
Sublime Security1.2%
Other96.1%
Email Security
 

Featured Reviews

Abhimanyu Das - PeerSpot reviewer
Senior Cybersecurity Engineer at Kyndryl
Targeted email filtering has reduced spam and phishing and now saves significant investigation time
The best features of Fortinet FortiMail include its techniques and tactics, which are highly effective compared to other solutions such as Microsoft 365. Although Fortinet FortiMail may not be as advanced in some aspects, it is well recognized for its strong performance in handling spam and phishing. It performs thorough mail scanning and also offers a sandboxing feature that enhances protection. Fortinet FortiMail has had a positive impact on my organization by significantly reducing unwanted email activities such as spam and phishing. It provides accurate detection and generates results that often exceed what can be achieved through manual analysis. Since deploying Fortinet FortiMail, I have observed a reduction in investigation time by at least 20 to 30 percent.
reviewer2764257 - PeerSpot reviewer
Manager Security Operations Center at a educational organization with 10,001+ employees
Improves decision-making with clear verdict explanations and works well across multiple environments
I know that a lot of time has been invested in improving the efficacy of the platform, and it shows; it performs very well. Moving forward, I think our focus should be on how to achieve better integration with other systems. While they do provide API-level access and web hooks, I believe more out-of-the-box integrations with SOAR platforms and SIEM tools would enhance Sublime's value. This would allow it to be integrated more closely with the workflows of various teams and could potentially increase its market appeal. From my perspective, the tool itself functions exceptionally well, which gives me confidence in the system. I want to see this functionality extend to other tools that I use, enabling faster automation and improved workflows for the team, particularly from a security operations standpoint. I have no critiques regarding the tool itself. They've done an outstanding job and are maintaining high quality throughout their development process. They have a great product, and it's essential that they continue to uphold that standard, even though it requires significant effort.
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Top Industries

By visitors reading reviews
Construction Company
9%
Financial Services Firm
8%
Manufacturing Company
8%
Computer Software Company
8%
Outsourcing Company
11%
Computer Software Company
9%
Financial Services Firm
9%
Marketing Services Firm
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business32
Midsize Enterprise23
Large Enterprise15
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise5
Large Enterprise7
 

Questions from the Community

What needs improvement with Fortinet FortiMail?
I think they should improve Fortinet FortiMail on-premises by enhancing its user interface. Additional features they could have in the future would include advanced analytics capabilities. I do thi...
What is your primary use case for Fortinet FortiMail?
I do have a partnership with Fortinet. I have been both a partner and reseller.
What is your experience regarding pricing and costs for Sublime Security?
My experience with pricing, setup cost, and licensing is limited, but I noticed that Sublime Security was slightly more expensive than Avanan or Defender, as Defender comes included with other Micr...
What needs improvement with Sublime Security?
I would say there are very minimal changes needed regarding Sublime Security; for first-time users, it can be difficult knowing how to write the tool. Having some templates available would improve ...
What is your primary use case for Sublime Security?
My main use case for Sublime Security is to test how this product works, so I am using this for that purpose. For a quick specific example of what I tested with Sublime Security, it detects the ema...
 

Also Known As

FortiMail
No data available
 

Overview

 

Sample Customers

Magromer Cueros y Pieles S.A.
Snowflake, Spotify, Anduril, Elastic, Compass, Encompass Health, Zscaler, Ovo Energy, Personio, Beneteler 
Find out what your peers are saying about Fortinet FortiMail vs. Sublime Security and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.