Kestrel

Microsoft, Redmond, Washington, United States

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.

According to our data, Kestrel is the 8th most popular web server on the web.
It has 0.4% of the web server market share and is detected on 0.3% of all websites.

It is especially popular in the United States, appearing on 0.6% of all websites in the country.

Statistics based on 4M+ analyzed websites. About this data

💸 Pricing

Kestrel is available for free.

Free ✔️ Open source

📊 Rankings and Market Share

🏆 Kestrel Awards

⚡ Sites Using Kestrel

We have data on 10,919 websites that use the Kestrel web server. Here is a list of some of the top ranked ones.

The highest rated site using Kestrel is cloud.microsoft.

#WebsiteRankCountryLanguage
1 cloud.microsoft #13 United States American English
2 office365.com #27 United States American English
3 msn.com #32 United States American English
4 xbox.com #404 United States English
5 dell.com #406 United States American English
6 covers.com #2,980 United States English
7 epic.com #3,133 United States English
8 365scores.com #3,168 English
9 kantimehealth.net #3,794 United States English
10 cuisineaz.com #3,966 France French
11 rev.com #5,420 English
12 jetsmart.com #5,422 Chile Spanish
13 zakon.kz #6,558 Kazakhstan Russian
14 vueling.com #7,055 Spain English
15 u.com.my #8,123 Malaysia English
16 jobs.iqvia.com English
17 chelseafc.com #11,438 English
18 jabra.com #11,483 English
19 mychart.org #11,817 American English
20 suckhoedoisong.vn #12,397 Vietnam Vietnamese

📈 Usage Statistics

Most of the sites that use Kestrel:

Most of the sites using Kestrel are from the United States.

  • United States 61%
  • United Kingdom 4.5%
  • Brazil 2.7%
  • China 2.6%
  • Netherlands 2.2%
  • Germany 1.8%
  • Italy 1.4%
  • Sweden 1.3%
  • Denmark 1.3%
  • Other 21.2%

Most Kestrel users speak English or Chinese.

  • English 73.7%
  • Chinese 4.3%
  • Portuguese 2.7%
  • Spanish 1.8%
  • German 1.7%
  • Indonesian 1.5%
  • Dutch 1.2%
  • Turkish 1%
  • French 1%
  • Other 11.1%

The Kestrel web server is especially popular on .com top-level domains.

  • .com 77.7%
  • .net 3.4%
  • .org 3.1%
  • .co.uk 1.5%
  • .com.br 1.4%
  • .nl 0.7%
  • .se 0.7%
  • .dk 0.6%
  • .de 0.6%
  • Other 10.3%

The primary market segments for websites utilizing Kestrel include business, marketing and merchandising, and online shopping.

  • Business 15.6%
  • Marketing/Merchandising 9.3%
  • Online Shopping 7.7%
  • Blogs/Wiki 6.8%
  • Motor Vehicles 6.1%
  • Internet Services 5.2%
  • Education/Reference 4.4%
  • Software/Hardware 4.3%
  • Travel 3.9%
  • Other 36.7%

🕵️ Similar Technologies

These are some of the best Kestrel alternatives.

RankName
1
Nginx
Seattle, Washington, United States

A lightweight, high-performance open-source HTTP server and reverse proxy designed for handling large volumes of concurrent connections with low memory usage.

FreeOpen source$3,500+/year
2
Apache
Wilmington, Delaware, United States

A cross-platform open-source web server that has been available since 1995.

FreeOpen source
4
Microsoft IIS
Redmond, Washington, United States

An extensible web server developed by Microsoft for Windows systems.

Free$$$
6
Tomcat
Wilmington, Delaware, United States

An open-source Java application server that implements the Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language, and Jakarta WebSocket specifications.

FreeOpen source
13
Cowboy
France

A small, fast, and modern HTTP server for Erlang that supports WebSocket, HTTP/2, and REST.

FreeOpen source

🆚 Compare Alternatives

Compare Kestrel to…

💬 Frequently Asked Questions

What is the company behind Kestrel?

Kestrel is owned by Microsoft Corporation, headquartered in Redmond, Washington, United States.

Is Kestrel free?

Yes, it is a free web server.
It is also open source, and you can find its source code on GitHub.

Which country uses Kestrel the most?

The majority of Kestrel users are from the United States.

Who uses Kestrel?

According to our data, Kestrel is used on thousands of sites, including such established ones as cloud.microsoft, office365.com, and msn.com.

Is Kestrel used on government websites?

Overall, we found Kestrel on 4 government sites in the United States.

Do academic institutions use Kestrel?

Yes. In total, we know of 2 academic websites in the United States that use Kestrel.

How does Kestrel compare to its competitors?

Kestrel is a fairly popular web server, ranking ahead of 32 other web servers we track.

What are the alternatives to Kestrel?

Alternatives and possible competitors to Kestrel may include Microsoft IIS, Nginx, and Tomcat.

👉 See Also

🗃️ About This Data