We primarily use the solution for a publishing website.
DevOps at a comms service provider with 11-50 employees
A stable, somewhat scalable solution that needs lots of training when elements are upgraded
Pros and Cons
- "The solution is the easiest way to publish applications which have been designed by older development tools."
- "The scalability depends on how you have set it up. If you're running IIS on a single server, it might not be as capable as if you are on many in a cluster or with load balancing and so on."
What is our primary use case?
What is most valuable?
The solution is the easiest way to publish applications which have been designed by older development tools.
What needs improvement?
Different parameters in this product can be a bit difficult. As soon as you introduce something new, and especially in the Microsoft environment, you always need to do new training sessions to understand what are new functionalities are. Finding the correct options are not more intuitive, and it should be.
For how long have I used the solution?
I've been using the solution pretty much since it was first released.
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What do I think about the stability of the solution?
The solution is very stable.
What do I think about the scalability of the solution?
The scalability depends on how you have set it up. If you're running IIS on a single server, it might not be as capable as if you are on many in a cluster or with load balancing and so on.
How are customer service and support?
We don't a contact for technical support, so I mostly have to cross my fingers and hope that nothing goes wrong.
How was the initial setup?
I wasn't around for the initial setup, but I can say that we started fairly simple, and it's grown more and more complex as time has gone on.
What other advice do I have?
We use the on-premises deployment model.
The solution is stable, it is working, and you can do a lot with this, but it is not my favorite product. I would prefer to use something that was open-source instead. I would rate it seven out of ten.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Systems Analyst/DBA at Vecima Networks
For us it's a lightweight web host that is easy to configure for simple webpages
Pros and Cons
- "It is a lightweight web host that is easy to configure for simple webpages."
- "Finding different settings can be difficult if you don't know where to look."
How has it helped my organization?
It allowed us to set up and use a Windows Server we had in place already to host our internal web page.
What is most valuable?
It is a lightweight web host that is easy to configure for simple webpages.
What needs improvement?
Finding different settings can be difficult if you don't know where to look.
For how long have I used the solution?
More than five years.
What do I think about the stability of the solution?
Stability seems good.
What do I think about the scalability of the solution?
We have not needed to scale out with it, as we use it for very lightweight things.
How are customer service and technical support?
I have not needed to contact technical support.
Which solution did I use previously and why did I switch?
I have tried other tools (such as Apache), and found that IIS is more stable and easier on the memory for low resource systems.
How was the initial setup?
Initial setup is straightforward for a basic setup (e.g. one host hosting HTTP traffic), but can get more complicated the more features you want to add (e.g. Windows Authentication, HTTPs, web farm, etc.).
What's my experience with pricing, setup cost, and licensing?
It is licensed with your Windows installation which makes it relatively cheap if you already have a Windows Server sitting around.
Which other solutions did I evaluate?
We also evaluated Apache, but found that IIS was easier to set up for what we wanted.
What other advice do I have?
Give it a shot. The features are included for free with Windows, so test it out. If you are unhappy, it is easy to disable and switch to a different solution.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Buyer's Guide
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September 2025

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Solutions Architect at a transportation company with 1,001-5,000 employees
It needs a more compact configuration, but the clustering feature is valuable.
What is most valuable?
- Clustering
- Application isolation
What needs improvement?
It needs a more compact configuration.
For how long have I used the solution?
I've used it for one year.
What was my experience with deployment of the solution?
No issues encountered.
What do I think about the stability of the solution?
It depends on the load of the server, but we have not had an issue.
What do I think about the scalability of the solution?
No issues encountered.
How are customer service and technical support?
Customer Service:
I've not used customer service.
Technical Support:I've not used technical support.
Which solution did I use previously and why did I switch?
We switched because of the nature of the application and technology.
How was the initial setup?
I always design my systems simple and keep them simple as possible.
What about the implementation team?
We implemented it with in-house team. We like to keep the knowledge in-house.
What was our ROI?
It was crucial and it definitely paid off.
What's my experience with pricing, setup cost, and licensing?
Keep the systems simple. Try to work with open-source solutions and pay for technical support and subscription to support the projects.
Which other solutions did I evaluate?
Yes, I always and regularly evaluate. In case of Java we evaluated all applications servers which support JEE full profile.
What other advice do I have?
I was using Apache Tomcat, JBoss AS (RedHat), WebMethods (Software AG) and IIS (Microsoft). All of them have they specialities, but depending on the goals and purpose it’s quiet easy to make a choice. Products based on Microsoft .NET do not give companies lot of options; either with Server Operating System shipped IIS, or the developer version called IIS Express. Applications written in Java, n opposite, can be accommodated on several fully profiled or non-fully-profiled application or web servers.
Only have one application per server if possible. Do not over complicate it, and keep the variance in the configuration simple as possible.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Senior System Engineer with 1,001-5,000 employees
Authentication for network appliances became easy to do but the monitoring needs improvement
What is most valuable?
- Easy to set-up
- Good to maintain
How has it helped my organization?
This made the security set-up easier and authentication simplified.
What needs improvement?
- Logging
- Monitoring
For how long have I used the solution?
I've used Microsoft NPS for four years.
What was my experience with deployment of the solution?
No issues encountered.
What do I think about the stability of the solution?
No issues encountered.
What do I think about the scalability of the solution?
No issues encountered but always gor for two machines as one isn't enough and isn't fault redundant.
How are customer service and technical support?
Customer Service:
Haven't needed it yet.
Technical Support:Haven't needed it yet.
Which solution did I use previously and why did I switch?
Yes, we used RSA Radius. It was very hard to maintain and outdated.
How was the initial setup?
Straightforward, it's a feature of Windows Server and a basic knowledge of the radius principles are enough.
What about the implementation team?
In-house implementation.
What was our ROI?
Pretty good. Authentication for network appliances, load balancing products and wireless devices became easy to do.
What's my experience with pricing, setup cost, and licensing?
It came with the Microsoft contract.
Which other solutions did I evaluate?
No, we were unhappy with RSA Radius so we went for the 'free' solution.
What other advice do I have?
It has many features, make sure they satisfy your needs.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Engineer at a tech vendor with 10,001+ employees
IIS is a reliable Web Server
Valuable Features:
IIS in windows 2003 onwards has become more secure by allowing the users to choose only the required components / features to install thereby reducing the surface area.
High performance and stability by isolating worker processes, application pools.
Essential for products like Exchange and SharePoint.
Comes with Windows OS, no separate licenses.
Room for Improvement:
Can be difficult to set up for new users and complex to troubleshoot.
Other Advice:
IIS is a reliable and secure product, works very well along side other components such as SQL and dotnet.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
IT Administrator at a tech consulting company with 51-200 employees
MS IIS- A good web server
Valuable Features:
1. It is Microsoft product that is easy to use and to host local and public websites.
2. Unfamiliar users can work on this product. No license required because it is integrated with the OS.
3. IIS has the ability to limit the bandwidth of your web pages.
4. If the application crashes then the server and other applications continue to run and the failed application restarts the next time with the request.
Room for Improvement:
1. It is not compatible with other platforms due to limitations.
2. Users can not change the source code as per the requirements because source code is not editable.
3. Compatibility issue with other applications.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
I'd like to add that it was mostly the licensing that kept me from using IIS. Microsoft licensing is not very clear; I ended up talking to an MS agent. They told me that if you are running IIS, you don't need an additional license for each person to connect and view a web page, but you will need a CAL for each person using AD authentication. If you choose to not use AD authentication, such as a database username and password, then you will need an external authentication license. Most sites will have some sort of permissions and security, even if it's just logging into an admin panel of some sort (all CMS')
I asked exactly how a CAL works, and I was told that it was a piece of paper to tell MS that you are in compliance if they decide to audit you. Each license is around $40.
Apache doesn't require you to purchase a license. Microsoft does and if you don't think so, you haven't read enough or talked to the right person (even MS agents have been known to provide inaccurate licensing information).
I hope someone finds this useful. I spent about 2 hours of my time getting solid answers. A few online MS resources, MS agents, and other forums have been in agreement with what I said above.
Penetration tester at a tech services company with 1-10 employees
A scalable solution with easy setup but needs to have a fast black box
Pros and Cons
- "The product is scalable."
- "The solution's black box is not fast."
What needs improvement?
The solution's black box is not fast.
What do I think about the stability of the solution?
I would rate the solution's stability a six out of ten.
What do I think about the scalability of the solution?
The product is scalable.
How was the initial setup?
The tool's setup is straightforward.
What's my experience with pricing, setup cost, and licensing?
The product's price is not high.
What other advice do I have?
I would rate the solution a five out of ten.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Software Engineer at Apmosys Technology Pvt. Ltd.
A stable and scalable solution with straightforward setup
Pros and Cons
- "The tool shows us the operating systems where our servers and applications are running."
- "There is an issue with the network. The tool's price is also high."
What is our primary use case?
The tool shows us the operating systems where our servers and applications are running.
What needs improvement?
There is an issue with the network. The tool's price is also high.
For how long have I used the solution?
I am using the tool for one year.
What do I think about the stability of the solution?
I would rate the tool's stability a ten out of ten.
What do I think about the scalability of the solution?
The solution is fully scalable. We have around 10-20 users for the solution.
How was the initial setup?
The solution's setup is straightforward. The deployment took around two to three weeks to complete.
What about the implementation team?
The tool's deployment can be done in-house.
What's my experience with pricing, setup cost, and licensing?
The tool's pricing is on a yearly basis.
What other advice do I have?
I would rate the product a nine out of ten.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company does not have a business relationship with this vendor other than being a customer.

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I agree with you about the worker processes and setting up separate application pools!
I love the ability to recycle an application pool without effecting any other pools/sites!