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Cisco Secure Email vs Trend Micro Deep Discovery Email Inspector [EOL] comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 26, 2026

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

Cloudflare One
Sponsored
Average Rating
8.6
Reviews Sentiment
6.5
Number of Reviews
23
Ranking in other categories
Email Security (20th), Secure Web Gateways (SWG) (12th), Data Loss Prevention (DLP) (22nd), Cloud Access Security Brokers (CASB) (12th), Distributed Denial-of-Service (DDoS) Protection (8th), Software Defined WAN (SD-WAN) Solutions (13th), Access Management (12th), Bot Management (3rd), ZTNA as a Service (8th), ZTNA (4th), Secure Access Service Edge (SASE) (9th), Remote Browser Isolation (RBI) (2nd)
Cisco Secure Email
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
63
Ranking in other categories
Email Security (6th), Cisco Security Portfolio (9th)
Trend Micro Deep Discovery ...
Average Rating
8.0
Reviews Sentiment
7.1
Number of Reviews
8
Ranking in other categories
No ranking in other categories
 

Featured Reviews

CV
Network Architect at IP Dimension
Cloud security has improved remote access and has reduced costs for smaller client sites
I have used Cloudflare One's Identity-Aware Proxy, and it is quite straightforward from what I have seen so far. The app registration on the Azure side integrates fully into Cloudflare, and I am very satisfied with that part because it is easy to set up. The integration of Cloudflare One's Secure Web Gateway and Zero Trust Network Access works without any issues. That part is pretty automatic, and if you complete the rest of the setup, it comes together by itself with no issues from my side. What makes it nice is that we can actually start replacing on-site firewalls at this stage for the smaller clients because it does not matter if they go to a coffee shop or work from home; they are still secured by the same connection. The hops get shorter and you get better latency. We have done testing to see if it is better. One thing that we did notice with our proof of concept with our current client is that they have people connecting from the UK. When they used their previous VPN solution, uploading CAD drawings and other files to the server took a long time. They mentioned that it is much quicker on Cloudflare One's solution. I definitely believe that is part of the improved performance, and I am satisfied with that as well. What is nice about Cloudflare One is that it makes the setup easier and also easier to train technicians to maintain it. Compared to legacy systems, we do not need to get fancy firewalls in place that are costly. That is definitely also a cost-saver with Cloudflare One.
KS
Technical Associate Network Security at Valuepoint Systems
Email security has protected financial data and provides clear tracking for every branch message
The areas of Cisco Secure Email that could be improved or enhanced are the slowness in the console. I don't think it was a database error or something, but we feel some slowness in configuring DLP and other content filters compared to other consoles. It may have been due to on-premises, but it was much noisy at some times while configuring DLP. When we tried to configure a DLP policy, the console became much slower. In that case, we cannot see what had happened in the mail which was blocked at that time. It may take nearly an hour to get back to normal while configuring policies. That is the major issue in the product.
Bilal Saleem - PeerSpot reviewer
Manager Pre Sales NI at Nera Philippines Inc.
Reliability and threat intelligence make this solution competitive, but AI improvements can further enhance its effectiveness
The best features of Trend Micro Deep Discovery Email Inspector include its reliability. The second valuable feature is its built-in sandbox feature, allowing for inspection of incoming emails and attachments. The sandbox is an appliance that opens any attachment in an enclosed environment to assess its impact and potential for viruses. This protects the network from harmful threats. Trend Micro has a very large R&D team with excellent threat intel, allowing them to provide better solutions than some competitors. They understand emerging threats based on the information from their EDR. The key strengths can be summarized as reliability, a good integrated one-box solution that includes a sandbox, and their R&D capabilities and good ratings, which lead to better threat intelligence. The detailed threat intelligence provided by Trend Micro Deep Discovery Email Inspector is valuable in understanding the behavior and tactics of potential email threats.

Quotes from Members

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

Pros

"Cloudflare One has assisted in securing my remote workforce through a SASE solution with Cloudflare One and the Workers part, although I am not currently using the Workers component."
"Cloudflare is simple to use."
"Cloudflare DDoS mitigates DDoS attacks."
"It's the endpoint exposition. We don't need to expose our VPN server to the internet and need a zero-test solution. I can apply some conditional access to the endpoint that's connecting to our network to check their security policies or the security condition of their workstation. Once the workstation is trying to connect to my internal network, then I would like to check the discrete condition of these endpoints that are trying to access my internal network. We created some conditional access. We have CrowdStrike, to check if the CrowdStrike is installed, to check if it's updated, and to check for Windows updates. We created some conditional policies to check it."
"Cloudflare Access is a stable solution."
"Cloudflare is by far the most effective solution that I have come across."
"Clover is the best product globally."
"The best feature is rate limiting. If I'm expecting 500 visits per hour, Cloudflare will limit the requests if I suddenly get 50,000."
"At one point, there was a zero-day attack. The Cisco appliance detected it and stopped it, helping us out. We avoided the attack and potential damage."
"Anti-Spam and Advanced Malware Protection are the most valuable features; they provide protection from most email threats and we also have the option to block Zero-day attacks."
"I can customize the configuration and policies."
"The solution is very configurable. It has enabled us to configure some specific filters to stop emails that general configurations didn't stop. It's a powerful solution. It can analyze a lot of emails simultaneously, with no problems of capacity or system load."
"The logs are easily readable and help diagnose problems, although they can be difficult to find initially. The solution addresses our email security, but for the rest of our security, we would use multiple vendors. It covers everything through email, like antivirus, IDS, and IPS."
"The reasons I chose Cisco Secure Email Gateway are the interface is - it's easy to use - and the support is great."
"Cisco's Secure Email integrates with Cisco Firewalls, utilizing the AMP as their anti-malware engine, which allows for information sharing between devices."
"It does a great job of preventing spam, malware, and ransomware."
"Trend Micro is a very good product."
"It can effectively monitor outbound and inbound devices."
"The solution's most valuable features include visibility into the network and fast sandboxing technology for alerts, though response time can vary."
"The most valuable feature of Trend Micro Deep Discovery Email Inspector is the simple analysis of phishing emails."
"I highly recommend Trend Micro Deep Discovery Email Inspector due to its security and scalability features."
"I find Trend Micro to be a good solution for security purposes."
"I would rate the solution's stability at ten out of ten."
"I like that it is very user-friendly and easy to install."
 

Cons

"The initial onboarding was causing us some confusion."
"Automation could be improved where you can easily add a TLS and SSL certificate to an application or web app if the developer did not include it."
"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."
"I would like them to include a VPN feature to provide a secure connection to the data center."
"The onboarding process can be improved a little bit."
"Cloudflare DDoS has poor technical support."
"The pricing is an area that can be improved. Pricing, as far as I recall, was the source of our problems."
"Operating and tuning the product is difficult."
"The hardware is not up to the mark. Two to three times a year we have complete downtime."
"I use the search all the time. Sometimes, it is hard to search for things and things are hard to find. People come to me all the time, saying, "This email didn't get through." Then, I go searching and don't find it on the first search. You have to think about alternative searches. I don't know if there is an easier way that they could help to find things. I don't know how they could simplify it, because now everybody else is using the cloud and everything is coming from Office 365, or whatever. It is just not the same environment from years ago where everybody had their own server and you could search easier."
"If you are not a technical guy, it is hard to maneuver, but as soon as you work on it, it gets better and better. If there was a better way to know how to do things or how to find things, it would be good."
"They can do it better with web links, with the URLs."
"Cisco is already providing a very good environment with the IronPort solution, but there could be some more integration with other products. For instance, an integration with the EDR solution could be there to raise an alert."
"Cisco is not good in dealing proactively or even reactively, so we end up relying on partners."
"The reporting functionality needs to be improved."
"My opinion on the licensing of this solution is that it is a mess that needs sorting out. I am not particularly bothered by pricing as I administer it and make recommendations for people to buy or not to buy."
"The product's feature for message processing and blocking devices for bulk emails needs improvement."
"The tool needs to incorporate faster response times for issue detection, more detailed reports, and better compatibility with older operating systems (e.g., Windows 7, 8, Server 2012)."
"Trend Micro's technical support has room for improvement. More efficient support should be provided, especially for standard support."
"The dashboard could be improved to match the quality of Check Point Harmony's dashboard."
"It could be more user-friendly, easier to install, and lighter on the network. I would say that for all products because you do not need technical expertise to take care of it. When you have a user-friendly solution, it makes it easier for the vendors or companies like us. We do not have to go to the client's site to attend to issues all the time. Because it is user-friendly, they can take care of it after some training."
"To improve Trend Micro Deep Discovery Email Inspector, it should have updates with better AI and ML-based integration."
"Trend Micro Deep Discovery Email Inspector could improve by making it easier to use. Microsoft solutions are easier to use."
"I would like to be able to send emails to a specific sandbox. This is a feature I would like to see added to the next release."
 

Pricing and Cost Advice

"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."
"The prices are slightly expensive."
"The pricing of the solution is cheap. The licensing cost is also very low. I rate the cost and pricing a three out of ten."
"My company has to make yearly payments towards the licensing costs attached to the solution. There are no hidden charges apart from the licensing costs of the solution."
"Cloudflare Zero Trust Platform's pricing is good."
"The solution is not that expensive."
"The solution's pricing lacks transparency."
"The price tag is no longer $200,000, but rather $300,000 to $400,000. It's twice."
"Cisco Secure Email is expensive, but we get what we pay for."
"As per market availability, this solution is more expensive than other vendors."
"I would rate the pricing a ten out of ten, where one is cheap, and ten is expensive."
"It is a super big router that costs a few hundred thousand dollars."
"The license was not per user, the license model was per feature. You could choose anti-virus, anti-spam, etc. It was feature-based and charged yearly."
"We were using Proofpoint and then we switched to Cisco... reportability was one of the main reasons we switched, but the biggest one was cost. If you can get an equivalent functionality for a better price it's wise to do so. That's what our primary decision came down to: We could get equivalent functionality at a lower price point."
"Cisco Secure Email is more expensive than other products. I rate it a five out of ten. There are no additional costs. You only need to pay the subscription amounts."
"We do annual licensing for Cisco Secure Email Gatewayand SMA together, and possibly SmartNet support. Packaged together, the cost is just under $38,000."
"We pay for an annual subscription for this email security solution."
"The solution's pricing is high, and I would rate it an eight out of ten."
"The price of Trend Micro Deep Discovery Email Inspector is less expensive than Microsoft solutions."
"It's an expensive solution, and you may not see a return on investment in a short period of time. However, you will see a return over a long period of time."
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Top Industries

By visitors reading reviews
Construction Company
18%
Comms Service Provider
10%
Outsourcing Company
9%
Financial Services Firm
9%
Financial Services Firm
12%
Manufacturing Company
9%
Outsourcing Company
7%
Computer Software Company
7%
Performing Arts
11%
Outsourcing Company
9%
Financial Services Firm
9%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise1
Large Enterprise12
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise18
Large Enterprise27
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise1
 

Questions from the Community

What needs improvement with Cloudflare Zero Trust Platform?
In my opinion, Cloudflare One can be improved mainly through compatibility, as the integration should be much simpler...
What is your primary use case for Cloudflare Zero Trust Platform?
Cloudflare One's primary use case for my organization is to protect servers and to provide remote access with the VPN...
What is your experience regarding pricing and costs for Cisco Secure Email?
The pricing structure is good as it is user-based or email client-based, which is positive for clients.
What needs improvement with Cisco Secure Email?
The areas of Cisco Secure Email that could be improved or enhanced are the slowness in the console. I don't think it ...
What is your primary use case for Cisco Secure Email?
We are using Cisco Secure Email to monitor the outgoing and incoming mail traffic in our financial institute. We have...
What is your experience regarding pricing and costs for Trend Micro Deep Discovery Email Inspector?
On the pricing side, Trend Micro Deep Discovery Email Inspector is not the cheapest, but it's not the highest either....
What needs improvement with Trend Micro Deep Discovery Email Inspector?
To improve Trend Micro Deep Discovery Email Inspector, it should have updates with better AI and ML-based integration...
What is your primary use case for Trend Micro Deep Discovery Email Inspector?
The main use case for using Trend Micro Deep Discovery Email Inspector is for the anti-spam solution. Different enter...
 

Also Known As

Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform
Cisco Email Security, IronPort, Cisco Email Security, ESA, Email Security Appliances
Deep Discovery Email Inspector
 

Overview

 

Sample Customers

23andMe
SUNY Old Westbury, CoxHealth, City of Fullerton, Indra
Bank Saint Petersburg, CEITEC S.A., Dar Al-Handasah, Mitsubishi Electric Information Systems, Motilal Oswal Financial Services Ltd, OKWAVE, Oman Arab Bank, VakifBank
Find out what your peers are saying about Proofpoint, Microsoft, Check Point Software Technologies and others in Email Security. Updated: July 2026.
908,344 professionals have used our research since 2012.