What is Kestrel?

Server

Kestrel is a web server: Cross-platform web server for ASP.NET Core. Tech Stack Detector identifies Kestrel on any website by analysing HTTP response headers.

Kestrel is a web server (Server), detected on 1 website in our index. See websites using Kestrel ↓

CategoryServer

Official sitelearn.microsoft.com

Detection signals1 signal

In our index1 website

How Tech Stack Detector detects Kestrel

Kestrel is matched from these signals during a single, ordinary page request. Each one contributes to the confidence score shown on a scan.

HeaderServer header identifies Kestrel

Detecting Kestrel also implies ASP.NET.

Websites using Kestrel

Recently scanned websites where we detected Kestrel. Open one to see its full technology stack.

alqahtanicar.com8 technologies · 9 d ago

Often used with Kestrel

Technologies most frequently detected alongside Kestrel across scanned websites.

BootstrapUI Library1 site SwiperUI Library1 site ASP.NETFramework1 site jsDelivrCDN1 site cdnjsCDN1 site UNPKGCDN1 site Font AwesomeFont1 site

Alternatives to Kestrel

Other Server technologies Tech Stack Detector detects: popular alternatives and related tools, most-detected first.

NginxServer69 sites LiteSpeedServer37 sites Apache HTTP ServerServer34 sites EnvoyServer12 sites Microsoft IISServer3 sites OpenRestyServer3 sites Apache TomcatServer CaddyServer

Compare Kestrel

Side-by-side comparisons of Kestrel with other Server technologies.

Kestrel vs Nginx Kestrel vs LiteSpeed Kestrel vs Apache HTTP Server Kestrel vs Envoy Kestrel vs Microsoft IIS

Popular technologies

The technologies most often detected across all websites scanned on Tech Stack Detector.

CloudflareCDN249 sites Google FontsFont220 sites Tailwind CSSUI Library170 sites ReactFramework165 sites Progressive Web AppOther148 sites PHPLanguage140 sites Node.jsLanguage136 sites Next.jsFramework124 sites BootstrapUI Library120 sites Google WorkspaceOther110 sites

Frequently asked questions

What is Kestrel?

Kestrel is a web server: Cross-platform web server for ASP.NET Core. Tech Stack Detector identifies Kestrel on any website by analysing HTTP response headers. Its official website is https://learn.microsoft.com/aspnet/core/fundamentals/servers/kestrel.

How can I tell if a website uses Kestrel?

Enter any URL into Tech Stack Detector and it reports whether Kestrel is present, with a confidence score and the exact evidence it matched. Detection is based on HTTP response headers. No login or crawling of the site is required.

What does detecting Kestrel imply?

When Kestrel is detected, Tech Stack Detector also infers ASP.NET, because Kestrel is built on top of it.

How many websites use Kestrel?

Kestrel has been detected on 1 website in the public Tech Stack Detector scan index. This reflects sites that visitors have analysed here, not global market share.

What are some alternatives to Kestrel?

Other Server technologies Tech Stack Detector detects include Nginx, LiteSpeed, Apache HTTP Server, Envoy, Microsoft IIS and OpenResty. You can compare any of them side by side with Kestrel.

Data last updated October 20, 2026 · based on 623 recently scanned websites.