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Azul Zulu vs IIS 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

Azul Zulu
Ranking in Application Infrastructure
11th
Average Rating
8.6
Reviews Sentiment
7.7
Number of Reviews
2
Ranking in other categories
AI Customer Experience Personalization (24th), AI Content Creation (11th)
IIS
Ranking in Application Infrastructure
1st
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
61
Ranking in other categories
Application Server (4th)
 

Mindshare comparison

As of August 2026, in the Application Infrastructure category, the mindshare of Azul Zulu is 3.7%, down from 4.6% compared to the previous year. The mindshare of IIS is 6.6%, down from 11.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Infrastructure Mindshare Distribution
ProductMindshare (%)
IIS6.6%
Azul Zulu3.7%
Other89.7%
Application Infrastructure
 

Featured Reviews

BasilJiji - PeerSpot reviewer
System engineer at a retailer with 10,001+ employees
Standardized our Java estate and have reduced licensing costs while maintaining strong support
Azul Zulu's ability to allow us to standardize our Java estate on a single and well-supported platform stands out as one of its best features. This standardization simplifies our compliance audits and ensures all our applications receive timely security updates.Azul Zulu positively impacts our organization by providing a platform that allows us to standardize Java on a well-supported platform. Without the high cost associated with other proprietary vendors, Azul Zulu provides an excellent platform for running our applications.
Krishnakumar Natarajan - PeerSpot reviewer
Systems Engineer at Atos
Designs and manages multiple websites while ensuring data backup and disaster recovery
I have experience with AWS, and I am most familiar with the server environment, as we just use the server environment and then use Microsoft products on an AWS environment. I have experience with Windows Server IIS, which I ran on my own on-premise data center. The website was developed and then hosted, and through IIS, we managed the servers. The manageability within the IIS environment is not very difficult. For server management, you need to ensure data backup, data restore, and you have a DR configured to keep the database intact. It was done on-premises, so I had no problem doing that. If you have to go to the cloud, then you should have the storage connected to the IIS server and also have a DR set up for that. I didn't use Microsoft Azure tools, but since it is a Microsoft product, Azure has all the portability, so you don't have to worry about compatibility on the cloud. On a scale of 1-10, I would rate this solution a 10.

Quotes from Members

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

Pros

"We've had no issues with stability."
"We achieved specific outcomes from using Azul Zulu by reducing our Java licensing and support costs by approximately 70% when compared to our previous Oracle contract."
"IIS is quite easy to set up as it comes pre-configured, so I don't have to install anything."
"The most valuable feature of IIS is it does not consume a lot of resources. It does not consume a lot of resources, such as memory."
"The solution has been reliable."
"The product's most valuable features are performance and security."
"What I like most about this program is the fact that it's built into Windows, and then I also like the interface and the support."
"The graphical user interface makes it easy for users to configure the sites."
"IIS is the best option on Microsoft Windows Server for hosting and deployment of .NET applications, either in a local environment or on the web."
"IIS is a stable solution for .NET applications."
 

Cons

"Improvements for Azul Zulu could include more automated tools for unused code visibility integrated directly into the standard portal to help further optimize our cloud footprints."
"It needs a better update daemon. At this time the process is manual and could be an issue on multiple desktop deployments."
"The price of the solution could be less to improve."
"It lacks a few performance improvement tools."
"Performance-wise, certain improvements in IIS are needed...IIS is not scalable. Its scalability is less."
"IIS needs to improve its security. Its support needs to be faster and clear. The tool's licensing could be cheaper as well."
"The only issue I've encountered is with certificates not working fine sometimes. It's influenced by the server's service performance."
"Scalability issues and security concerns need attention from Microsoft."
"The initial setup could be made easier."
"It should be more user-friendly because unless you know how IIS works as a Microsoft product, a system admin cannot just manage it."
 

Pricing and Cost Advice

Information not available
"IIS's pricing is reasonable."
"The yearly licensing cost is very high. The solution is very expensive."
"IIS comes along with an OS license from Microsoft. Others can opt for a perpetual-based licensing model to be able to use the system."
"There is a license needed for the solution."
"It is licensed with your Windows installation which makes it relatively cheap if you already have a Windows Server sitting around."
"I think it's part of the Windows Server, so you won't have any other costs to add in order to use the IIS service."
"The tool's pricing is on a yearly basis."
"The solution’s pricing is yearly. The pricing is affordable and not high."
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Top Industries

By visitors reading reviews
Financial Services Firm
29%
Construction Company
13%
Manufacturing Company
11%
Retailer
8%
Financial Services Firm
14%
Manufacturing Company
10%
Comms Service Provider
10%
Construction Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise11
Large Enterprise22
 

Questions from the Community

What needs improvement with Azul Zulu?
Improvements for Azul Zulu could include more automated tools for unused code visibility integrated directly into the standard portal to help further optimize our cloud footprints. The other core J...
What is your primary use case for Azul Zulu?
Azul Zulu serves as our primary Java runtime, providing a stable, 100% open-source, and certified solution for our production microservices. We utilize it to ensure cross-platform compatibility acr...
What advice do you have for others considering Azul Zulu?
My advice for others looking into using Azul Zulu is to perform a pilot migration with one non-critical application first. You will likely find that it is truly a drop-in replacement, which will gi...
Which is better - IIS or NGINX Plus?
IIS is a flexible, secure, and manageable web server to host anything on the web. IIS’s scalable and open architecture can handle the most demanding tasks. From media streaming to web applications,...
What is your experience regarding pricing and costs for IIS?
For the pricing, setup cost, and licensing for IIS, as a Microsoft product, I didn't think much about separately purchasing an IIS product as it is part of Microsoft Windows. We bought a developmen...
What needs improvement with IIS?
I see that IIS has maintained the same interface for a long time, so they could potentially use more automation or integrate Copilot into it to make it easier to use. I have not accessed or checked...
 

Comparisons

 

Also Known As

No data available
Windows Server IIS
 

Overview

 

Sample Customers

Microsoft, Kyocera, OKI, Alcatel-Lucent Enterprise, Voya Financial
Erste Bank Group, NJVC, Samsung Electronics, Sheraton Hotels and Resorts, Tata Steel Europe, Urban Software Institute
Find out what your peers are saying about Azul Zulu vs. IIS and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.