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

Mindshare comparison

SSL/TLS Decryption Mindshare Distribution
ProductMindshare (%)
A10 Networks Thunder SSL Insight (SSLi)27.3%
Symantec SSL Visibility Appliance23.2%
GigaSMART21.3%
Other28.200000000000003%
SSL/TLS Decryption
Application Delivery Controllers (ADC) Mindshare Distribution
ProductMindshare (%)
F5 BIG-IP Local Traffic Manager (LTM)13.0%
NetScaler12.1%
HAProxy8.9%
Other66.0%
Application Delivery Controllers (ADC)
CDN Mindshare Distribution
ProductMindshare (%)
Fastly5.6%
Cloudflare16.4%
Akamai12.6%
Other65.4%
CDN
 

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.
Pranay Jain - PeerSpot reviewer
Senior software developer at Simplifyvms
Edge caching has transformed response times and delivers faster candidate data globally
Fastly can be improved in certain areas such as VCL, which is powerful but has a steep learning curve for normal users. A more user-friendly, UI-based configuration could simplify the experience, alongside better templates for common use cases and dashboard improvements, as the current dashboard feels complex for beginners, and pricing can be hard to predict for smaller companies. I chose 8 out of 10 because it has excellent performance and low latency delivery, making it suitable for larger applications, with strong Edge Caching and instant purging capabilities. However, VCL complexity and pricing predictability, especially for smaller companies, along with a user-friendly dashboard are areas impacting my score.

Quotes from Members

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

Pros

"With the Thunder SSLi, we're better protected. We can stop use of VPN and proxies. We are better protected against dirty traffic coming back to our schools. Having a secure decrypt zone with the equipment lowers the chances that our security infrastructure could possibly miss an attack."
"This is one of those devices that, once you turn it on and it's functioning properly, you'll forget that you have it."
"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."
"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."
"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."
"The most valuable feature of this solution is IP Intelligence."
"We chose F5 BIG because of its technical support as well as its documentation."
"In terms of stability, it is stable."
"The most valuable feature of F5 BIG-IP LTM is it helps our delivery team to make policies and rules for application."
"iRule feature is useful."
"Where we are finding the AWS version helpful is when we are trying to scale up new environments. AWS Marketplace helps here a lot."
"When I look to work with a vendor like this, I look for vendors that are responsive, certainly ones that have a good reputation, and ones that when you get their products, they actually do what they tell you they're going to do."
"For our internal use we went with F5 because it's the best tool."
"Rate limiting is a good feature that protects from volumetric attacks."
"The product's initial setup phase is straightforward."
"The product helps our organization to access sites located in different regions quickly."
"Fastly combines both the CDN side and the Signal Sciences next-generation WAF, which is closely integrated with the CDN, allowing us to use both products seamlessly."
"Initially, we faced load time issues, but after deploying Fastly and optimizing our queries, we achieved a response time cut to less than 1 millisecond from an initial 3 to 4 seconds."
"Its initial setup process is straightforward."
"Compute@Edge features are valuable to me."
"Fastly uses configuration versioning, where you can deploy a new version in less than one minute."
 

Cons

"I would like them to have a better UI (better universal design)."
"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."
"SSLi is a very powerful device. It has many features and to get them configured is kind of tough."
"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."
"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."
"I would like there to be more device security. I would like the tool to support SSL links, along with SSL and TLS."
"The GUI needs improvement."
"There are not very many areas for improvement, but the price is high."
"A more hybrid approach would be beneficial for users."
"The auto logout feature after three minutes is terrible. I wish they would make that longer, since it is not a feature that we can change."
"The pricing of the product is a bit too high."
"It would be good to have better traffic and better data. It would be nice to have more granularity to see packets in terms of the header details, the analytics, etc. It would be nice if that was also part of it and to have analytics added to the traffic."
"Its GUI could be a bit better. Other than that, it's already pretty good. We don't use it in a high-performance environment. So, we don't really care so much about too many features."
"It's not easy to start with Fastly if you don't have VCL knowledge, so it appears very complex at the beginning."
"The product should provide improved bot detection and management."
"Support is not that great."
"Fastly can be improved in certain areas such as VCL, which is powerful but has a steep learning curve for normal users."
"It is missing a "staging" platform to deploy a test configuration with all of the real settings, which would allow us to properly test before putting it into production."
"What I don't like about Fastly is that they charge a heavy price."
"We are not getting quick responses from Fastly technical support engineers. Sometimes they depend on their D3 developers."
"The solution's pricing could be better."
 

Pricing and Cost Advice

"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."
"When you purchase the equipment, you purchase the licensing and warranty. It's all fairly standard. We haven't been caught with anything surprising."
"F5 is expensive."
"It is a little pricey. I wish the pricing was cheaper, but I wish the pricing was cheaper for everything."
"The licensing pricing seems relatively easy enough to get your head around. I would advise anyone to ensure that you have a conversation with an F5 consultant before purchasing, as you would with most products."
"F5 is more expensive than other solutions, so you have to be sure F5 is the best solution to fit the requirements."
"This is a high-priced tool. We pay for its license yearly."
"If your IT budget is good, go for it."
"The solution is more expensive than one of its competitors."
"Purchasing through the AWS Marketplace was good. We chose to go through the AWS Marketplace because everything that we needed was a soft appliance. We needed something to work in Amazon, and this product was available there."
"I've generally found Fastly to be very competitive in pricing, especially around Compute@Edge."
"The pricing has been very competitive."
"In my opinion, Fastly is priced competitively."
"You need to pay a premium price for the tool."
"The solution is cheaper than other products in the market."
"Fastly is less expensive than one of its competitors."
"It is an expensive solution."
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Top Industries

By visitors reading reviews
No data available
Financial Services Firm
16%
Computer Software Company
7%
Manufacturing Company
7%
Government
7%
Comms Service Provider
12%
Financial Services Firm
11%
Computer Software Company
9%
Healthcare Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business62
Midsize Enterprise32
Large Enterprise86
By reviewers
Company SizeCount
Small Business6
Large Enterprise6
 

Questions from the Community

Ask a question
Earn 20 points
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; someti...
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 ...
What is your experience regarding pricing and costs for Fastly?
The pricing of Fastly can be hard to predict because it is primarily usage-based with minimal setup costs and flexibl...
What needs improvement with Fastly?
Fastly can be improved in certain areas such as VCL, which is powerful but has a steep learning curve for normal user...
What is your primary use case for Fastly?
Fastly serves as an Edge Cloud platform and CDN that we use for real-time Edge Caching and instant caching purging, a...
 

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
No data available
 

Overview

 

Sample Customers

Klein Independent School District
Riken, TransUnion, Tepco Systems Administration, Daejeon University, G&T Bank, Danamon, CyberAgent Inc.
Twitter, Airbnb, Alaska Airlines, Pinterest, Vimeo, The Guardian, The New York Times, Ticketmaster, The Drupal Association, Opera, about.com, imgur, Etsy, Foursquare, GitHub, New Relic, shopify, Shazam, Firebase
Find out what your peers are saying about Broadcom, A10 Networks, Gigamon and others in SSL/TLS Decryption. Updated: May 2026.
896,510 professionals have used our research since 2012.