🆚 Gunicorn vs. Microsoft IIS

Compare technologies based on real-world usage data *

📈 Microsoft IIS is much more popular than Gunicorn.
🌍 Microsoft IIS is more popular in all countries.

Type

Web server

Web server

About

Gunicorn ("Green Unicorn") is a Python WSGI HTTP server for UNIX, a pre-fork worker model ported from Ruby's Unicorn project.

Microsoft Internet Information Services (IIS) is an extensible web server developed by Microsoft for Windows systems.

It has a modular architecture with standalone components, supports HTTP, HTTP/2, HTTP/3, HTTPS, FTP, FTPS, SMTP, and NNTP protocols, enables worker process isolation through application pools, and provides native integration with ASP.NET and ASP.NET Core.

Headquarters

Creil, France

Redmond, Washington, United States

Website

gunicorn.org #436,077

iis.net #106,574

Pricing

Free ✔️Open source

Free version ✔️IIS Express

Bundled with Windows Server, which is $1,176+

Categories

Web Servers › Rank #15

Web Servers › Rank #4

Popularity

Determined by the number of sites using each technology.

The Microsoft IIS web server is 75 times more popular than Gunicorn.

Total websites

Market share

Web Servers

Popularity by country

Determined by the number of sites detected from each country.

Microsoft IIS is more popular than Gunicorn in all countries.

United States

China

United Kingdom

Italy

Turkey

India

Netherlands

Germany

Canada

Brazil

Awards

⭐ 7th most popular in Switzerland in the Web Servers category.
⭐ 9th most popular in Belgium in the Web Servers category.
⭐ 10th most popular in the Czech Republic in the Web Servers category.
🔥 12nd most popular in the United Kingdom in the Web Servers category.
🔥 12nd most popular in France in the Web Servers category.

🥇 Most popular in Brunei Darussalam in the Web Servers category.
🥈 Second most popular in China in the Web Servers category.
🥈 Second most popular in Turkey in the Web Servers category.
🥈 Second most popular in Cambodia in the Web Servers category.
🥉 Third most popular in Italy in the Web Servers category.

Popularity by domain category

Determined by the number of sites in each category.

Microsoft IIS is more popular than Gunicorn in all market segments.

Business

Marketing/Merchandising

Education/Reference

Online Shopping

Internet Services

Health

Travel

Software/Hardware

Public Information

Sports

Top sites

Top-ranked sites that use these technologies.

Name

Rank

#1,263

#2,002

#2,264

fictionexpress.com

#2,825

#6,658

Name

Rank

#73

#74

stackoverflow.com

#101

#227

#261

Compare alternatives

Technologies with similar characteristics.

See also

Gunicorn technology profile

* According to recent studies, many of online reviews are fake.
When making your decision, it is better to rely on data that cannot be falsified.
Our service evaluates the popularity of technologies by the number of websites using them.

Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.