🆚 H2O vs. Microsoft IIS
- 📈 Microsoft IIS is much more popular than H2O.
- 🌍 Microsoft IIS is more popular in all countries.
- ⭐ H2O is particularly popular in New Zealand.
Statistics based on 3.3M+ analyzed websites. About this data
Type
Web server
Web server
About
H2O is an optimized, open-source HTTP server that supports HTTP/1.x, HTTP/2, and HTTP/3.
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
Tokyo, Japan
Redmond, Washington, United States
Pricing
Free ✔️Open source
Free version ✔️IIS Express
Bundled with Windows Server, which is $1,176+
Categories
Web Servers › Rank #30
Web Servers › Rank #4
Popularity
Determined by the number of sites using each technology.
The Microsoft IIS web server is 1,865 times more popular than H2O.
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 H2O in all countries.
United States
China
United Kingdom
Italy
Turkey
India
Netherlands
Germany
Canada
Brazil
Awards
- ⭐ 10th most popular in New Zealand 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.
- 🥉 Third most popular in Italy in the Web Servers category.
- 🥉 Third most popular in the Czech Republic in the Web Servers category.
Popularity by domain category
Determined by the number of sites in each category.
Microsoft IIS is more popular than H2O in all market segments.
Business
Education/Reference
Marketing/Merchandising
Online Shopping
Health
Internet Services
Travel
Software/Hardware
Public Information
Sports
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Nginx
Apache
LiteSpeed Web Server
OpenResty
Tomcat🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,375,483 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.