F5 Networks is still clearly the leader in the application delivery market — but, you should definitely consider other options. And the obvious alternative to F5 is Citrix...

A blog comparing Citrix and F5 would be fairly pointless, it comes down to your own ideology. However, do you really need either of these high end solutions?

Yes, sometimes — but let's explore why with a simple comparison of Kemp Technologies and Citrix NetScaler ADC. They are clearly at opposite ends of the market — and yet they offer similar benefits.

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When you want to scale — bring out the heavy iron...

The size of your business and your application will play a key part when making your decision on which load balancer to choose. You need to ensure that new load balancers will deliver return on your investment and not quickly be out-grown when your business requirements change.

Typically, Citrix NetScaler customers have a few hundred load-balanced clusters, with 3+ Gbps and 10,000+ SSL transactions per second (TPS). Whereas your typical Kemp customer will have 2-5 load balanced clusters with less than 100 Mbps throughput and less than 5 SSL TPS.

Obviously, there are exceptions with both products, but these figures probably sum up your typical customer for each vendor.

Why is the typical customer deployment size important?

Because although Kemp has load balancer models that easily handle high throughput... do you really think it is as heavily tested and proven as the Citrix?

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Kemp Technologies would like you to focus on the price...

Load balancers with similar features can have surprisingly large price differentials. High end load balancers like Citrix ADC and F5 LTM are very mature products with strong brands. They both have extensive feature sets and a broad range of hardware performance options.

NetScaler ADC is one of the most expensive in the market whilst the Kemp LoadMaster is at the opposite end with cheaper pricing. Each vendor provides different features and benefits — but a suprisingly similar end result.

Simply comparing performance specifications and declaring the cheapest one the winner is just lazy thinking. Unless, throughput is your ONLY requirement.

Which features are most important to you?

The NetScaler ADC has all the features and benefits you could ever need — but probably won't ever use. Whereas Kemp offers a solid feature set which easily meets the vast majority of customer requirements.

Make sure that you don't end up paying a high price for features you don't need.

Why is the typical customer usage of your features important?

Because, if you are doing something unusual (such complex scripting), then wouldn't it reassure you that lots of other people were successfully using the same features? After all — Layer 7 load balancing is a LOT more likely to be buggy than Layer 4 load balancing. This is also a strong argument for open source code (but that's another story).

Is this the support you were looking for?

Each vendor provides a support service with it's own packages. NetScaler and Kemp both provide a solid support offering. But whoever you choose, make sure that they can support your business and your applications. I always recommend testing the pre-sales support offering before you buy.

Do you trust them to help you achieve zero downtime?

If you can't get the help you need to resolve unexpected issues it could be catastrophic for your business and your customers.

NetScaler's support options are pricey, but that is probably fair — as they have a complex product range and a large in-house global support team.

Kemp however, relies on it's resellers to provide first-line support: This can lead to confusion, poor initial responses and slow escalation. How much pain will this cause you when your site is down?

Let's weigh them up...

NetScaler ADCs are generally suited to larger organizations. Typically they are deployed on the edge of the network. They comply with nearly every industry standard and they can securely scale and optimise hundreds of applications for the largest global companies.

In contrast, The Kemp product range has all the basic features that you would need, and they are perfectly capable of handling most requirements. However, most companies will deploy Kemp for a small number of internal clusters. They lack the enhanced security and optimization technology that an enterprise would require on the edge of the network.

So, if you don't need a big iron ADC on the edge of your enterprise network. Then a relatively simple load balancer, like one from Kemp, may just be right for your requirements — and it will certainly be cheaper!

The NetScaler will probably take longer to procure and implement and you may need a special team in house as well as technical (or on site) suppport from NetScaler to manage and maintain the set up.

Kemp's products are both easier in terms of procurement and implementation and should be easily manageable in house. With both vendors you have the choice of hardware, virtual and cloud load balancers to choose from.

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Should you look anywhere else before buying a KEMP?

Kemp and Loadbalancer.org use the exact same open-source code base, making the products very similar. In fact the performance and features are almost identical.

Loadbalancer.org vs Kemp - features not included?

Did you know that (unlike Kemp), all of our products come with WAF and GSLB as standard? There are no additional or hidden costs for advanced features. And of course, we also have no performance restrictions.

Our team of experts can provide the best solution for your infrastructure or if you need something very specific, we can even customize our load balancers to suit your needs.

Loadbalancer.org vs Kemp - sales targets or free consultancy?

What makes us different from Kemp is that you can buy direct. Purchasing directly allows you to save time and money. But more importantly, we want to ensure that you implement the right solution for your business.

Have you ever been up-sold to the wrong product by a reseller?
That would never happen with us — ever.

Our free consultancy at the start of the sales process guides you in the right direction and helps you avoid any costly design mistakes.

But, don't be surprised when we talk you out of the most expensive option - that's because our sales guys don't get a bonus for ripping you off! You can trust us to give you the best solution, at the right price, no matter what your load balancing requirements are.

We take great pride in our application specific documentation. We are also more than happy to guide you through the deployment process. If your requirements are slighlty more complex, we're also very happy to arrange technical calls between you and our in-house infrastructure specialists — as many as you need, as and when you need them.

Loadbalancer.org vs Kemp - direct access to an engineer?

Our support team is available 24 hours a day, 365 days a year via online chat, email or phone giving you peace of mind that we're always on hand to help no matter how complex the issue is.

Our engineers have in-depth knowledge of our products and provide partner solutions too. They carry out extensive testing and training and provide a fully documented solution to ensure painless deployments.

Don't just take my word for it though - take a look for yourself here.

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So, final thoughts?

Although you were originally reading this blog because you were making a decision between NetScaler and Kemp - don't forget that there are other load balancer vendors in the market to choose from.

And if you're still struggling to make a decision, then check out this application delivery controller comparison on Gartner.

In the meantime though, if you have any questions about any of the above, feel free to contact us on info@loadbalancer.org or if you want to know more about what we can offer then check out our free trial (which, by the way, comes with unlimited free 24/7 support!).

Or far quicker — you could just leave a comment below.