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Fortra's Alert Logic MDR vs Tenable Nessus comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Oct 9, 2024

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

Zafran Security
Sponsored
Ranking in Vulnerability Management
16th
Average Rating
9.6
Reviews Sentiment
7.8
Number of Reviews
6
Ranking in other categories
Continuous Threat Exposure Management (CTEM) (1st)
Fortra's Alert Logic MDR
Ranking in Vulnerability Management
28th
Average Rating
8.0
Reviews Sentiment
6.9
Number of Reviews
11
Ranking in other categories
SOC as a Service (3rd), Managed Detection and Response (MDR) (19th)
Tenable Nessus
Ranking in Vulnerability Management
1st
Average Rating
8.4
Reviews Sentiment
6.0
Number of Reviews
86
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2025, in the Vulnerability Management category, the mindshare of Zafran Security is 1.1%, up from 0.1% compared to the previous year. The mindshare of Fortra's Alert Logic MDR is 0.6%, up from 0.3% compared to the previous year. The mindshare of Tenable Nessus is 7.7%, down from 11.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management Market Share Distribution
ProductMarket Share (%)
Tenable Nessus7.7%
Zafran Security1.1%
Fortra's Alert Logic MDR0.6%
Other90.6%
Vulnerability Management
 

Featured Reviews

Israel Cavazos Landini - PeerSpot reviewer
Weekly insights and risk analysis facilitate informed security decisions
I appreciate the weekly insights Zafran provides, which include critical topics for networks and IT security, allowing us to evaluate which insights apply to our environment. The organization score feature is valuable to keep the leadership team updated on how our infrastructure fares security-wise. The applicable risk level versus base risk level feature is beneficial because prior to Zafran, we only used the base risk level, but now understand that risk depends on the asset itself. Zafran is an excellent tool.
reviewer2191746 - PeerSpot reviewer
It's a highly mature, competitively priced solution that provides total visibility into your ecosystem. FORTRA's Alert Logic has the only Cybersecurity Platform that integrates XDR+WAF+VM+DLP in one.
Alert Logic offers total visibility into the client's IT ecosystem. The solution's intrusion detection system inspects 100 percent of the network packets and installs universal agents on all physical and virtual servers for log collection. Alert Logic also aggregates logs of the client's various 3rd Party security tools into a single pane of glass. All of the analytics from those data feeds got to a 24/7 SOC with sophisticated resources. Alert Logic has massive threat intelligence resources to provide additional context to the incident response declarations. They do all the heavy lifting for clients who lack the technology and resources to operate their own SOC. The client is solely responsible for the incident response component. The macro analytics resides on Alert Logic's cloud. You have the ECM response and business application team on the client side. Everything works in tandem, which is the only way you can deal with the advanced threats we face today, especially the ransomware families. If you don't respond in minutes, you're in trouble.
HarshBhardiya - PeerSpot reviewer
Provided increased visibility across the organization's servers
The user interface of Tenable Nessus feels outdated and could be more user-friendly. Additionally, the documentation is not well-organized, which can be confusing when searching for solutions or specific information related to Tenable Nessus Professional. The reporting feature could be improved by allowing users to create their own templates instead of relying on predefined ones.

Quotes from Members

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

Pros

"We are able to see the real risk of a vulnerability on our environment with our security tools."
"Overall, we have seen about eighty-seven percent reduction of the number of vulnerabilities that require urgency to remediate, specifically the number of criticals."
"We saw benefits from Zafran Security almost immediately after deploying it."
"Zafran has become an indispensable tool in our cybersecurity arsenal."
"Zafran is an excellent tool."
"Everything is in one dashboard; I'm notified when there's an incident and advised on what steps to take."
"It improves our security. Before, we didn't have anything scanning our containers. We had software scanning all the physical servers, but we had nothing to scan our containers. With Alert Logic, we can do that."
"Notifications and the detail of notifications are most valuable. It is a user-friendly solution."
"The quicker implementation of changes to our infrastructure from Alert Logic tell us if there are any problems."
"The most valuable aspect of Alert Logic is its technology platform. They have SOCs in the US and Europe, giving them global visibility of the threat landscape. They detect and respond to threats in minutes. Their biggest value is human expertise. You're being attacked by a human, and you cannot respond to it unless you have a human on the other side. They have the human and technological resources to respond."
"The installation and configuration were slick."
"We receive infrastructure security warnings from it. So, we know what is going on and what needs to be addressed."
"It is a very stable product."
"The most valuable feature of Tenable Nessus is website scanning."
"The results are not that bad, but the key selling point is that it is an affordable tool set."
"It does exactly what you expect it to do, and its pricing is great. We couldn't really ask for a better deal."
"The trial version is very good for testing whether it will suit your needs."
"Tenable Nessus is cheap and flexible."
"The most valuable feature of Tenable Nessus is vulnerability detection."
"The most valuable feature of Tenable Nessus is the support it provides for any new vulnerabilities quickly."
"I like this solution because it is complete. It can scan and check many types of vulnerabilities. It can also check for compliance."
 

Cons

"The dashboarding and reporting functionality of Zafran Security is an area that definitely could use some improvements."
"Initially, we were somewhat concerned about the scalability of Zafran due to our large asset count and the substantial amount of information we needed to process."
"I think the ability to have some enhanced reporting capabilities is something they can improve on, as they have good reports but we have asked for some specific reporting enhancements."
"As a user involved with the user interface, I believe there is a need to continue improving it based on feedback from our customers."
"The product needs to mature. We don't want to be bombarded with unnecessary issues and have the real ones slip through."
"Its menu is not very intuitive. I would like to see the user menu expanded a bit. The user menu is very layered, and because of the layers, you have to go down a path that is not very intuitive."
"I would like more data on the alert payload. It would be good to have the ability to customize the alert payload to add whatever data that we want on there. Right now, it is a bit limited."
"I would like to see it do initial scans and start capturing data, which it will truly analyze, not just be a reporting system saying, "Here is an email. Here is an email. Here is an email.""
"Could be more of an endpoint protector."
"The setup process was complex."
"Alert Logic needs to expand its SOCs to serve more markets, such as the Middle East and Asia. There should be infrastructure that covers more time zones. The company should also develop an EDR that is natively integrated into their solution. Currently, a client must buy another EDR solution like CrowdStrike or Sophos. I think Alert Logic is developing this. Built-in email security could also be developed and integrated."
"This is still a maturing product. Tenable is only a scanner for one ability, while other solutions like Rapid7 have more tools for verification. We still have to manually verify to see if the vulnerability is a false positive or not."
"It would be nice for the professional module to include some of the reports available in the expert module."
"Model OS costs (and its segregation schema for individual modules)."
"The scalability of Tenable Nessus is good. However, it could be more flexible."
"You can scale Nessus to the extent that you can afford it. You need to have a license for every device you scan. As long as you can afford the increased costs, you won't have a problem scaling it."
"The price and scalability of the solution could improve."
"We have had some false positives in the past, which we hope can improve in the future."
"Tenable Nessus could improve by having more steady updates which will reduce the vulnerabilities."
 

Pricing and Cost Advice

Information not available
"Alert Logic has better competitive pricing than some of its competitors."
"Almost any product that is on the AWS Marketplace is super easy to subscribe to."
"Its pricing is very reasonable considering what you get for what you pay. There is quite a good value there. Its licensing is also very logical. They've got the licensing price points at a reasonable level. It is on a monthly license but a yearly contract. There are no additional costs to the standard licensing fees."
"Price of the solution was very reasonable considering the size of our organization at the time, and so it worked out perfectly."
"Our ROI would probably be zero. We don't even use it. It sits in there. We get emails and just delete them. Around the world, we don't even use it."
"We incurred a single cost for a perpetual license, although I cannot comment on the price as this is above my management level."
"Our organization is huge so our license costs $30,000."
"Its price is high for Libya. The companies here in Libya don't have the awareness of and a good budget for cybersecurity services. If you want them to go for a product, you need to provide something different. This differentiation is related to the price. They should give about 40% to 45% discount per person on the current cost."
"I rate the product's price seven or eight on a scale of one to ten, where one is low price and ten is high price."
"I would like to see better discounts."
"The price of Tenable Nessus could improve, it is expensive."
"Nowadays, your vulnerability applications are going to be kind of pricey because lots of them, including Rapid7, are based upon a base price, but then they add in the nodes. That's where they get you. If you're a big network, obviously, you need to scan everything. Therefore, it's going to be costly. The risk and insurance money associated with having ransomware on my networks is going to cost me more money, time, and marketing than the price of the tool. That's why I'm speaking only as an information security officer to security operations. This is the tool that is there in my toolbox to say whether we vulnerable or not. At this point, I don't care about how much it costs my company to have it because if I wasn't able to report it and we got ransomware, then who cares? I'm probably going to be out of business because it happened. That's why I don't care about the price. I have it, and I could use it effectively and do my report. At the end of the day, even if we get ransomware, as long as I reported it, followed my protocol, and put in the change, irrespective of whether it was ignored or denied, I did my job."
"The cost is around $4,300 per year. Use is unlimited. You don't pay more if you want to use it for another IP."
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Top Industries

By visitors reading reviews
Financial Services Firm
11%
Computer Software Company
9%
Manufacturing Company
8%
Government
6%
Computer Software Company
24%
Manufacturing Company
14%
Educational Organization
6%
Performing Arts
5%
Computer Software Company
12%
Financial Services Firm
10%
Government
10%
Manufacturing Company
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise2
Large Enterprise6
By reviewers
Company SizeCount
Small Business38
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

What is your experience regarding pricing and costs for Zafran Security?
Since we stood Zafran Security up in our private cloud, we handle the maintenance on our side. As we opted not to use...
What needs improvement with Zafran Security?
In terms of areas for improvement, Zafran Security is doing a really great job as a new and emerging company. Oftenti...
What is your primary use case for Zafran Security?
My use cases for Zafran Security revolve around two primary areas. One is around vulnerability management and priorit...
Ask a question
Earn 20 points
How would you choose between Rapid7 InsightVM and Tenable Nessus?
You have full visibility across cloud, network, virtual, and containerized infrastructures with Rapid7 Insight VM. Yo...
What's the difference between Tenable Nessus and Tenable.io Vulnerability Management?
Tenable Nessus is a vulnerability assessment solution that is both easy to deploy and easy to manage. The design of ...
What do you like most about Tenable Nessus?
We have around 500 virtual machines. Therefore, we conduct monthly scans and open tickets for our developers to addre...
 

Also Known As

No data available
Alert Logic MDR, Alert Logic Managed Detection and ResponseAlert Logic Threat Manager, Alert Logic Cloud Defender, Critical Watch FusionVM
No data available
 

Overview

 

Sample Customers

Information Not Available
Information Not Available
Bitbrains, Tesla, Just Eat, Crosskey Banking Solutions, Covenant Health, Youngstown State University
Find out what your peers are saying about Fortra's Alert Logic MDR vs. Tenable Nessus and other solutions. Updated: September 2025.
868,787 professionals have used our research since 2012.