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A10 Networks Thunder SSL Insight (SSLi) vs F5 BIG-IP Local Traffic Manager (LTM) comparison

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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:
 

Categories and Ranking

A10 Networks Thunder SSL In...
Average Rating
9.0
Number of Reviews
3
Ranking in other categories
SSL/TLS Decryption (2nd)
F5 BIG-IP Local Traffic Man...
Average Rating
8.2
Reviews Sentiment
6.8
Number of Reviews
124
Ranking in other categories
Application Delivery Controllers (ADC) (1st)
 

Mindshare comparison

A10 Networks Thunder SSL Insight (SSLi) and F5 BIG-IP Local Traffic Manager (LTM) aren’t in the same category and serve different purposes. A10 Networks Thunder SSL Insight (SSLi) is designed for SSL/TLS Decryption and holds a mindshare of 22.3%, down 31.8% compared to last year.
F5 BIG-IP Local Traffic Manager (LTM), on the other hand, focuses on Application Delivery Controllers (ADC), holds 11.6% mindshare, down 16.1% since last year.
SSL/TLS Decryption Mindshare Distribution
ProductMindshare (%)
A10 Networks Thunder SSL Insight (SSLi)22.3%
Symantec SSL Visibility Appliance25.0%
Fidelis Elevate19.0%
Other33.7%
SSL/TLS Decryption
Application Delivery Controllers (ADC) Mindshare Distribution
ProductMindshare (%)
F5 BIG-IP Local Traffic Manager (LTM)11.6%
NetScaler11.6%
HAProxy8.3%
Other68.5%
Application Delivery Controllers (ADC)
 

Featured Reviews

KM
Data Center Network Engineer at BRIDGETON PUBLIC SCHOOLS
Enables our content filter to do its job without any noticeable delay
Its most valuable feature is its ability to do its job accurately, effectively, and very quickly. The amount of traffic that we have going through our system is astounding. We have 6,900 students and about 1,100 staff members. Most of our teachers and staff are connecting through our system. You add to that all the cell phones, the iPads, and all the computers, and then each individual website's connection, that's a lot of traffic in a period of one second. The delay with the SSL decryption turned on is almost unnoticeable. That is great because most SSL decryption solutions — a couple of competitors we did try — their devices crashed as soon as we turned decryption on.
edshyaa - PeerSpot reviewer
Network Engineer at Stryker
Load balancing has improved traffic distribution and currently supports high availability upgrades
F5 BIG-IP Local Traffic Manager (LTM) offers effective load balancing methods that help distribute traffic across our servers, whether we have two or several. This load balancing feature stands out as it is the fundamental work we do with F5 BIG-IP Local Traffic Manager (LTM). While I recognize there are many features, such as iRules, which I have not explored yet, we primarily work on VIPs, pool members, and traffic distribution. The load balancing algorithms' flexibility makes them very useful for our team, enabling us to choose different servers and manage load effectively. We use various methods based on user or application requirements, making the algorithms set up by F5 in the backend quite helpful. F5 BIG-IP Local Traffic Manager (LTM) positively impacts our organization primarily through its load balancing capabilities. We avoid traffic overload on individual servers by placing backend servers behind F5 BIG-IP Local Traffic Manager (LTM) VIP. This load balancing helps us manage traffic effectively. Since the configuration of the I-series, we have had smooth performance, and with the recent migration to the R-series, it is working faster than before, providing positive outcomes for our operations. Since moving to the R-series, I notice improved performance; it is user-friendly and handles traffic efficiently. The upgrading process is different as we create tenants and a main host. R-series has better CPU and memory, leading to higher throughput with minimal downtime, making it a significant improvement over the I-series.

Quotes from Members

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

Pros

"Its most valuable feature is its ability to do its job accurately, effectively, and very quickly. The amount of traffic that we have going through our system is astounding... The delay with the SSL decryption turned on is almost unnoticeable."
"With the Thunder SSLi, we're better protected; we can stop use of VPN and proxies, are better protected against dirty traffic coming back to our schools, and having a secure decrypt zone with the equipment lowers the chances that our security infrastructure could possibly miss an attack."
"By not renewing six proxy boxes, rather just three of them, it saved over $100,000."
"This is one of those devices that, once you turn it on and it's functioning properly, you'll forget that you have it."
"We have several proxies in our environment, so we localized internet traffic between these proxies. Instead of getting a really huge proxy box, according to our size, we can use three boxes and share the traffic with A10's load-balancer feature."
"It is a stable product but sometimes we have some issues."
"The main reason that we suggest this product to our clients is the great integration with other security tools, such as IBM Guardium."
"LTM."
"The impact of SSL offloading on reducing server load and latency is very much positive because whatever traffic we receive, we encrypt at our F5 BIG-IP Local Traffic Manager (LTM) level, which has definitely reduced the additional load and SSL decryption load on the servers, so it has very much helped us and it is very smooth; it will not take much time and will not impact our regular traffic."
"It is a scalable solution."
"I like that F5 BIG-IP Local Traffic Manager (LTM) is a product that comes with valuable features, but what stands out from all features is load balancing."
"F5 delivers a full range of solutions that simplify service providers’ security architectures while mitigating threats."
"This is a very stable solution; I've been using their products for years and have never had any issues."
 

Cons

"SSLi is a very powerful device. It has many features and to get them configured is kind of tough."
"It would be great if it supported SSL operations according to Active Directory users. For example, if we want to bypass one of the servers or a client's internet access for SSL interception, we have to do it according to the IP address. It would be better if we could do it according to the Active Directory username. A10 says they kind of support that but we haven't tested it."
"I would like them to have a better UI (better universal design)."
"There is one thing I would like to see changed. In their features for setting things up, there is a templating system that would normally assist clients. However, we had a better time setting up the device either through the command line or through the interface and not using the templates that were pre-installed. So there is room for improvement to the templates for initial installation."
"Technical support could be improved."
"For example, if you have an E 2000 or I 4000, you might have a lot of traffic and the device cannot handle it very well."
"The analytics should provide insight into latency across various traffic routes and virtual servers."
"I used GitHub for autoscaling CloudFormation, and I found two bugs and I submitted them. Their implementation in GitHub could be cleaner and allow for a bit more customization."
"BIG-IP LTM is taking a long time to mature in cloud environments. They plan to improve cloud integration in the next version, but it isn't out yet. It's essential because more companies are moving to the cloud these days and using things like Kubernetes or microservices. F5 needs to improve in that direction, and they are."
"For a future release, I would like to see more features in the cloud."
"Needs to provide a visual interface to follow a customer's activity (from client to BIG-IP to SNAT IP to the chosen server, then back). Today, we are still performing packet captures."
"A lot of functions that are attributed to iRules can actually be simple profile changes. iRules do have a certain performance impact. Therefore, instead of writing simple iRules, they can create certain profiles for classes that will perform the same function."
 

Pricing and Cost Advice

"We always pay for support. Any organization of our size who doesn't is asking for problems."
"When you purchase the equipment, you purchase the licensing and warranty. It's all fairly standard. We haven't been caught with anything surprising."
"Our licensing costs, yearly, are just under $15,000. Your initial cost of acquisition is obviously going to be more than $15,000..."
"We have found the pricing and licensing on AWS to be competitive."
"This is a high-priced tool. We pay for its license yearly."
"It could be priced a little less, especially on the virtual side. It gets a bit expensive, but you get what you pay."
"There are no additional fees to the standard licensing fee; everything is paid once."
"I found F5 BIG-IP Local Traffic Manager (LTM) an expensive product. The costs would depend on the appliance and infrastructure size. However, my company didn't have to pay extra to use additional features."
"Though functionality is high, its cost can be considered slightly higher than its competitors​."
"When we purchased additional licenses for our other locations, we received a discount of between 20% and 25%."
"The pricing is inclusive of many features."
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Top Industries

By visitors reading reviews
Outsourcing Company
14%
Comms Service Provider
9%
Manufacturing Company
9%
Construction Company
7%
Financial Services Firm
14%
Outsourcing Company
12%
Manufacturing Company
8%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business62
Midsize Enterprise32
Large Enterprise86
 

Questions from the Community

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What needs improvement with F5 BIG-IP?
F5 BIG-IP Local Traffic Manager (LTM) could improve file upload speeds when opening cases and attaching files; sometimes, downloading files like QKView takes time, depending on size. I expect faste...
What is your primary use case for F5 BIG-IP?
My main use case for F5 BIG-IP Local Traffic Manager (LTM) is placing our applications on F5 and the backend servers on the pool. We also regularly renew SSL certificates before they expire, usuall...
 

Also Known As

Thunder SSLi
F5 BIG-IP, BIG-IP LTM, F5 ASM, Viprion, F5 BIG-IP Virtual Edition , Crescendo Networks Application Delivery Controller, BIG IP
 

Overview

 

Sample Customers

Klein Independent School District
Riken, TransUnion, Tepco Systems Administration, Daejeon University, G&T Bank, Danamon, CyberAgent Inc.
Find out what your peers are saying about Broadcom, A10 Networks, Gigamon and others in SSL/TLS Decryption. Updated: October 2026.
918,970 professionals have used our research since 2012.