🆚 Caddy vs. Microsoft IIS
- 📈 Microsoft IIS is much more popular than Caddy.
- 🌎 Microsoft IIS is more popular in the United States, China, and the United Kingdom.
- 🌍 Caddy is more popular in Seychelles, the Marshall Islands, and Saint Helena.
CaddyType
About
Caddy is an open-source multi-platform web server written in 
Go with built-in support for automatic HTTPS and modern web protocols.
It supports automatic TLS management with providers such as Let's Encrypt and ZeroSSL, includes a built-in reverse proxy with load balancing, offers configuration through the human-readable Caddyfile or a 
JSON-based REST API, and features a modular architecture that can be extended with plugins.
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
Pricing
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
Awards
- ⭐ 5th most popular in Germany in the Web Servers category.
- ⭐ 5th most popular in Belgium in the Web Servers category.
- ⭐ 5th most popular in Austria in the Web Servers category.
- ⭐ 5th most popular in Romania in the Web Servers category.
- ⭐ 5th most popular in Finland 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.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Nginx
Apache
OpenResty
Tomcat
Tengine
LiteSpeed Web Server🗃️ 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 3,406,701 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.