🆚 Cowboy vs. Kestrel
- 📈 Kestrel is four times more popular than Cowboy.
- 🌎 Kestrel is more popular in the United States, the United Kingdom, and Brazil.
- 🌍 Cowboy is more popular in Japan and Austria.
Statistics based on 3.3M+ analyzed websites. About this data
Type
Web server
Web server
About
Cowboy is a small, fast, and modern HTTP server for 
Erlang that supports 
WebSocket, HTTP/2, and REST.
Kestrel is an open-source, cross-platform web server for 
ASP.NET Core that can serve HTTP requests on Windows, 
Linux, and macOS.
It uses an event-driven, high-performance architecture to handle many concurrent connections, supports HTTP/1.1, 
HTTP/2, HTTP/3, and WebSockets, provides HTTPS support, and integrates closely with the ASP.NET Core middleware pipeline and configuration system.
Headquarters
France
Redmond, Washington, United States
Pricing
Free ✔️Open source
Free ✔️Open source
Categories
Web Servers › Rank #18
Web Servers › Rank #11
Popularity
Determined by the number of sites using each technology.
The Kestrel web server is 4 times more popular than Cowboy.
Total websites
Market share
Web Servers
Popularity by country
Determined by the number of sites detected from each country.
Kestrel is more popular in the United States, the United Kingdom, and Brazil, while Cowboy is more popular in Japan and Austria.
United States
United Kingdom
Brazil
Netherlands
Germany
Italy
Sweden
Australia
Turkey
Canada
Awards
- ⭐ 10th most popular in Brazil in the Web Servers category.
- 🔥 14th most popular in Japan in the Web Servers category.
- 🔥 16th most popular in the United Kingdom in the Web Servers category.
- 🔥 17th most popular in the United States in the Web Servers category.
- 🔥 17th most popular in Germany in the Web Servers category.
- ⭐ 5th most popular in Georgia in the Web Servers category.
- ⭐ 6th most popular in Turkey in the Web Servers category.
- ⭐ 6th most popular in Iran in the Web Servers category.
- ⭐ 8th most popular in the United Kingdom in the Web Servers category.
- ⭐ 8th most popular in Brazil in the Web Servers category.
Popularity by domain category
Determined by the number of sites in each category.
Kestrel is more popular than Cowboy in all market segments.
Business
Marketing/Merchandising
Online Shopping
Education/Reference
Motor Vehicles
Software/Hardware
Blogs/Wiki
Internet Services
Sports
Travel
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Nginx
Apache
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 3,367,747 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.