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IIS vs NGINX Plus comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 12, 2025

Review summaries and opinions

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

ROI

Sentiment score
7.1
IIS enhances security and load balancing, boosting ROI with improved authentication and flexible cloud options.
Sentiment score
7.4
NGINX Plus improved website speed, reduced costs, and enhanced application accessibility, offering varied returns despite higher costs than alternatives.
 

Customer Service

Sentiment score
6.6
IIS support offers mixed reviews, with effective critical issue handling but needing improvement in response times and basic support.
Sentiment score
6.8
Most users rely on community resources and documentation, but those who use technical support rate it effective despite variable response times.
There are typically no significant issues.
 

Scalability Issues

Sentiment score
7.1
IIS scalability varies based on setup and infrastructure, with improvements in newer versions but challenges remain in larger contexts.
Sentiment score
8.0
NGINX Plus is highly scalable, adaptable to configurations, and efficiently manages load balancing, especially on AWS or GCP.
It depends on the server environment and the presence of a UPS for power backup.
While some people use NGINX for web servers, my current use case focuses on networking and tunneling, which does not necessitate much scaling.
 

Stability Issues

Sentiment score
7.8
IIS is stable and reliable for most, with high ratings and low maintenance, despite some compatibility challenges.
Sentiment score
7.9
NGINX Plus is stable and reliable with minor concerns, often attributed to configuration, performing well in production environments.
I would rate IIS's stability as an eight out of ten.
I require ninety-nine point nine percent uptime, and NGINX has been pivotal in helping me achieve this along with our other DNS services.
 

Room For Improvement

IIS struggles with compatibility, security, and support, needing improved documentation, monitoring, intuitive interface, and broader platform integration.
NGINX Plus needs improvements in scalability, ease of use, pricing, performance, security integration, and standalone deployment options.
It's influenced by the server's service performance.
NGINX could provide a means to generate self-signed SSL certificates.
As with any application, there were initial issues, however, after receiving support, everything was rectified.
 

Setup Cost

IIS pricing is affordable with Windows Server but can incur extra costs like licensing fees and SSL publishing.
NGINX offers a free version, while NGINX Plus requires a paid license with flexible, feature-based pricing options.
If you have a Windows license, there is no additional cost for IIS.
My use case involves using the free and open-source version of NGINX, making it cost-effective as I haven't incurred any costs.
The solution offers a cost advantage.
 

Valuable Features

IIS integrates seamlessly with Windows, offering stability, performance, intuitive management, and ideal hosting for Exchange and SharePoint.
NGINX Plus provides efficient load balancing, caching, and security with high performance, modularity, and seamless integration for flexible traffic management.
It is easy to publish websites with SSL, and it integrates well within the local environment and cloud.
For API management, the WebSocket, and the WebServer, NGINX provides a cost advantage, value addition, and effective support.
 

Categories and Ranking

IIS
Ranking in Application Infrastructure
1st
Average Rating
8.0
Reviews Sentiment
7.0
Number of Reviews
56
Ranking in other categories
Application Server (4th)
NGINX Plus
Ranking in Application Infrastructure
2nd
Average Rating
8.6
Reviews Sentiment
7.2
Number of Reviews
31
Ranking in other categories
Application Delivery Controllers (ADC) (6th)
 

Mindshare comparison

As of March 2025, in the Application Infrastructure category, the mindshare of IIS is 12.4%, down from 13.2% compared to the previous year. The mindshare of NGINX Plus is 11.1%, down from 11.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Infrastructure
 

Featured Reviews

VikramSingh6 - PeerSpot reviewer
A simple and easy-to-use solution but not recommended for public apps
I would rate the overall solution a six out of ten. We have around five to six developers and engineers for the solution’s deployment and maintenance. You can use the solution if your website is not too big or complicated. However, if it is big and complicated, then you need to use Apache or Red Hat. This tool can be used for internal purposes. But if you plan to host a public app, then I wouldn’t recommend the tool.
Ritesh-Bakhru - PeerSpot reviewer
Quick installation and very easy to manage while doing orchestration or automation
NGINX cannot be a replacement for your traditional load balancer with what we use in the network today. However, with applications going toward microservices, NGINX is definitely a way forward. F5 has many traditional load balancing features, so they still need to bring some of those features to NGINX. NGINX is a very basic load balancer and cannot do as many customizations as F5. I think F5 is trying to implement those features in NGINX so they can improve the balancing on NGINX, but I think that will take some time. With the traditional F5 set up, the same OS can do load balancing, firewalls, and even policy enforcement. If we are able to bring some of those capabilities to NGINX, I think it would become a versatile solution and usage would definitely increase.
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Top Industries

By visitors reading reviews
Financial Services Firm
15%
Computer Software Company
15%
Manufacturing Company
9%
Government
7%
Computer Software Company
18%
Financial Services Firm
17%
Government
8%
Manufacturing Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

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?
If you have a Windows license, there is no additional cost for IIS. However, you may need to pay for SSL publishing at times.
What do you like most about NGINX Plus?
It performs very well. That's one of the primary reasons we use NGINX.
What is your experience regarding pricing and costs for NGINX Plus?
My use case involves using the free and open-source version of NGINX, making it cost-effective as I haven't incurred any costs.
What needs improvement with NGINX Plus?
One area of improvement could be that NGINX could provide a means to generate self-signed SSL certificates. This would eliminate the need to use third-party software such as SaaS Boost for generati...
 

Comparisons

 

Also Known As

Windows Server IIS
NGINX
 

Overview

 

Sample Customers

Erste Bank Group, NJVC, Samsung Electronics, Sheraton Hotels and Resorts, Tata Steel Europe, Urban Software Institute
Locaweb, AppNexus, Wix, Reliam, Montana Interactive, MuleSoft, Warpwire, Discovery Education, InkaBinka, WordPress.com, Gogo, GOV.UK, NASA
Find out what your peers are saying about IIS vs. NGINX Plus and other solutions. Updated: March 2025.
841,540 professionals have used our research since 2012.