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

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 26.3%, up 25.0% compared to last year.
F5 BIG-IP Local Traffic Manager (LTM), on the other hand, focuses on Application Delivery Controllers (ADC), holds 12.4% mindshare, down 15.3% since last year.
SSL/TLS Decryption Mindshare Distribution
ProductMindshare (%)
A10 Networks Thunder SSL Insight (SSLi)26.3%
Symantec SSL Visibility Appliance22.5%
GigaSMART20.4%
Other30.80000000000001%
SSL/TLS Decryption
Application Delivery Controllers (ADC) Mindshare Distribution
ProductMindshare (%)
F5 BIG-IP Local Traffic Manager (LTM)12.4%
NetScaler11.5%
Fortinet FortiADC8.4%
Other67.7%
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

"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."
"By not renewing six proxy boxes, rather just three of them, it saved over $100,000."
"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."
"The value and impact of using F5 BIG-IP LTM for application delivery control in our organization are significant."
"The feature I find the most valuable is the support infrastructure."
"it has TCP LAN and WAN optimization features. It has has caching."
"You can't go wrong with F5 because F5 and Citrix ADC are like the most advanced BMW in the market."
"Most important is that it stops very common attacks which can be performed by a simple hacker, and up to the advanced level."
"The integration and configuration are great, and using the F5 provider with Terraform to create new nodes, pools, and servers has made the integration seamless for us."
"Traffic Learning is the most valuable feature."
"The F5 GTM/BIGIP DNS (Global Traffic Manager) is a valuable feature. This feature allows for DNS load balancing, which means that high availability and load sharing can be done across services locally, as well as across datacenters with advanced capabilities​."
 

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."
"A more intuitive interface would be helpful."
"I don't think that this product really provides value for the money."
"The setup is a little bit complex."
"F5 BIG-IP LTM can improve on the SSL loading which includes the authentication of certificates. Although, most of these issues have been solved there are still some issue that persists."
"F5 has another solution to load balance servers on the cloud, which they got after the purchase of NGINX. It is deployed as Kubernetes or something like that, but the problem now is that they have two solutions for two situations. They should make F5 deployable on the cloud."
"Reporting could be improved and configuration made easier."
"Bugs are the part of program and they are fixed with every release, as with any vendor."
"The GUI of F5 BIG-IP Local Traffic Manager (LTM) could be improved."
 

Pricing and Cost Advice

"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 always pay for support. Any organization of our size who doesn't is asking for problems."
"The cost is high for this product, so it's not suitable for small customers, e.g. those with small environments."
"Great product for the money. But they can get really expensive, so get what meets your needs."
"F5 pricing is too high, compared to Citrix."
"There are additional costs depending on what modules or what functionality is required."
"It is the best solution, but that comes with an increased price."
"The price is little bit on higher side compared to the cost of NGINX."
"It is a little pricey. I wish the pricing was cheaper, but I wish the pricing was cheaper for everything."
"It's not a cheap product, but there are no other replacements for what we do with it."
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Top Industries

By visitors reading reviews
Financial Services Firm
11%
Manufacturing Company
9%
University
9%
Comms Service Provider
9%
Financial Services Firm
15%
Manufacturing Company
9%
Construction Company
7%
Computer Software 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: June 2026.
903,147 professionals have used our research since 2012.