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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
10th
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 July 2026, in the Application Infrastructure category, the mindshare of Azul Zulu is 3.7%, down from 4.9% compared to the previous year. The mindshare of IIS is 6.8%, down from 11.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Infrastructure Mindshare Distribution
ProductMindshare (%)
IIS6.8%
Azul Zulu3.7%
Other89.5%
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 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."
"We've had no issues with stability."
"My experience with the technical support by Microsoft at large is satisfactory."
"It is an easy-to-use and secure program."
"The product is easy to configure."
"Stability-wise, I rate the solution a nine out of ten...Scalability-wise, I rate the solution a nine out of ten."
"The product is stable."
"IIS works natively with Windows Server without any issues in publishing certificates."
"It is a Microsoft product that is easy to use and to host local and public websites."
"What I like the most is that it is easy to use."
 

Cons

"It needs a better update daemon. At this time the process is manual and could be an issue on multiple desktop deployments."
"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."
"Performance-wise, certain improvements in IIS are needed...IIS is not scalable. Its scalability is less."
"IIS's memory management could be improved."
"The platform's stability could be better."
"Scalability issues: No issues encountered but always go for two machines as one isn't enough and isn't fault redundant."
"The solution's scalability needs improvement."
"Presently, some developers do not have technical knowledge of managing IIS, so that needs to be improved in the next release."
"The solution's black box is not fast."
"The only issue I've encountered is with certificates not working fine sometimes. It's influenced by the server's service performance."
 

Pricing and Cost Advice

Information not available
"The solution’s pricing is yearly. The pricing is affordable and not high."
"IIS's pricing is reasonable."
"The tool's pricing is on a yearly basis."
"I give the price of the solution a five out of ten."
"I didn't need to get an additional license for the solution since it was included in my server."
"The solution provides multiple licensing options."
"We pay a yearly licensing fee for the solution."
"There is a license needed for the solution."
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Top Industries

By visitors reading reviews
Financial Services Firm
29%
Construction Company
11%
Manufacturing Company
10%
Retailer
8%
Financial Services Firm
15%
Manufacturing Company
10%
Construction Company
9%
Computer Software Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business29
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: June 2026.
902,988 professionals have used our research since 2012.