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Azul Zing vs IIS comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Mar 5, 2025

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 Zing
Ranking in Application Infrastructure
12th
Average Rating
9.6
Reviews Sentiment
5.9
Number of Reviews
10
Ranking in other categories
AI Customer Experience Personalization (24th)
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 October 2026, in the Application Infrastructure category, the mindshare of Azul Zing is 2.8%, down from 3.3% compared to the previous year. The mindshare of IIS is 6.2%, down from 10.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Infrastructure Mindshare Distribution
ProductMindshare (%)
IIS6.2%
Azul Zing2.8%
Other91.0%
Application Infrastructure
 

Featured Reviews

Mohakhan Khan - PeerSpot reviewer
Software Technical Expert at a tech vendor with 10,001+ employees
Real-time charging has stayed consistent and cuts GC incidents while reducing cloud costs
The best features Azul Zing offers include no stop-the-world during the full GC. No stop-the-world pauses during full GC, and we hit higher TPS with fewer JVMs -- a real win for maintenance and cost. As an online charging system, we can't afford crashes or latency spikes. Before Zing, JVMs would hang and drop from the grid on missed heartbeats. GC tuning is also out-of-the-box -- no more time consuming manual tuning like with Oracle/OpenJDK with no significant outcome.
Frederic Hautecoeur - PeerSpot reviewer
Senior System Integrations Architect at bs-team
Integrated web hosting has simplified secure services and has supported long-term growth
To be honest, I do not see any major areas for improvement. Perhaps something simple and minor. It should not go more complex than it is at the moment. The only disadvantage I see is that the documentation is a bit difficult to find. There is a lot of configuration that is very hard to get information about.

Quotes from Members

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

Pros

"With minimal effort, Zing has helped us improve our latency performance drastically."
"The non-stop garbage collector (C4 - Continuously Concurrent Compacting Collector) is the most valuable feature."
"With minimal effort, Zing has helped us improve our latency performance dramatically."
"Performance of the JVM, especially the C4 Pauseless Garbage Collection, for continuous application execution is the most valuable feature."
"After using Azul Zing, it is almost a zero-incident situation because of the GCs."
"GC Pause times are maintained in low milliseconds, which is beneficial for applications with high volume, high memory allocation rate, and a high memory footprint, and it also increases throughput by approximately 20-25% as compared to Oracle Java Development Kit based on some tests that I have done with real applications."
"With Zing, we've now been able to re-allocate those tuning resources to general product development."
"With minimal effort, Zing has helped us improve our latency performance dramatically."
"IIS works natively with Windows Server without any issues in publishing certificates."
"The solution is easy to use and connects with Microsoft, and the solution is very robust."
"IIS is quite easy to set up as it comes pre-configured, so I don't have to install anything."
"We use the solution for our customer's web applications."
"The interface, simplicity, and ease of management are all good features that make this user-friendly."
"The product's most valuable features are performance and security."
"The solution has been reliable."
"Authentication for network appliances, load balancing products and wireless devices became easy to do."
 

Cons

"The licensing over non-production environments considerably affects the cost of our solution as a software vendor."
"It is extremely expensive."
"However, like every other great product, there is always something that can be improved."
"The profiling tools included with Zing lag behind those available for Oracle's Java implementation."
"Although Azul claims to have a fast warmup, we still experience higher latency for the first trade when our system starts up on Sundays."
"We have encounter stability issues and that has been a source of frustration at times."
"Although Azul claims to have a fast warmup, we still experience higher latency for the first trade when our system starts up on Sundays."
"The solution should improve the cluster environment and load balancing."
"IIS could improve the error logging. There are times we are not able to see the errors."
"IIS could improve by having some features related to URL rewrite, ARR (Application Request Routing) and HTTPS certificate generation."
"Finding the correct options are not more intuitive, and it should be."
"IIS has some stability issues and needs restarting."
"It is not compatible with other platforms due to limitations."
"We've never had any issues with the solution, but it's still nice to have overall improvements on it. It could be easier and faster to use, for example."
"Microsoft products can only work within the Windows environment, which limits their versatility."
 

Pricing and Cost Advice

Information not available
"There is an annual license to use this solution and the price could be better."
"IIS is expensive."
"The solution’s pricing is yearly. The pricing is affordable and not high."
"The tool is included with Windows."
"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 cost for IIS is already included in Windows services. We don't have to pay anything extra."
"The licensing cost is dependent on the usage."
"Users can get a subscription-based license or a perpetual license for IIS."
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Top Industries

By visitors reading reviews
Financial Services Firm
20%
Manufacturing Company
12%
Construction Company
11%
Outsourcing Company
8%
Financial Services Firm
14%
Manufacturing Company
11%
Comms Service Provider
9%
Construction Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise4
Large Enterprise3
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise12
Large Enterprise22
 

Questions from the Community

What is your experience regarding pricing and costs for Azul Zing?
Setup cost isn't significant, the documentation is clear and straightforward, and licensing is simple. I'm not directly involved in pricing negotiations, but given we run it across many production ...
What needs improvement with Azul Zing?
Nothing major, but one nuance: Zing auto-adjusts internal config based on available CPUs, which can cause brief CPU spikes every few minutes. These are harmless, but can give ops/monitoring teams a...
What is your primary use case for Azul Zing?
We run a large in-memory data grid to store millions of customers -- clusters of up to 30-40 JVMs, each with ~90GB heap, deployed across a variety of infrastructure including Azure, AWS, and on-pre...
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

Priceline, RBS, Credit Suisse, ING, Creditex, Nielsen, Workday, Saks Fifth Avenue, Entergy, Quotix, Puma and many more.  Visit azul.com for more.
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 Zing vs. IIS and other solutions. Updated: September 2026.
917,433 professionals have used our research since 2012.