How many companies use Kestrel?

TechLeads currently detects Kestrel on 35,569 websites. HTTP Archive's monthly crawl, a separate dataset, detected it on 55,725 pages in September 2026.

Who are Kestrel's biggest competitors?

By number of websites, the largest Web servers technologies besides Kestrel are Nginx (8,387,228), Apache HTTP Server (5,337,900), LiteSpeed (2,330,787), OpenResty (1,207,916), Next.js (1,032,904).

Which companies use Kestrel?

Websites using Kestrel include portswigger.net, fantacalcio.it, dell.com, dndbeyond.com, tunwalai.com, kiabi.com. The full list of 35,569 websites can be exported as a CSV for $29.

Kestrel market share and customers

As of October 8, 2026, Kestrel is used by 35,569 websites in the TechLeads index: 0.18% of all Web servers detections, the 13th most-used of 81 Web servers technologies.

35,569

websites using Kestrel

0.18%

share of Web servers

#13

of 81 in Web servers

Cite this data

Quoting these numbers? Credit TechLeads with a link to this page.

Citation

TechLeads. "Kestrel Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/kestrel/market-share

HTML link

<a href="https://techleads.fyi/technology/kestrel/market-share">Kestrel market share (TechLeads data)</a>

Kestrel vs competitors in Web servers

Websites using each technology in the TechLeads index, and its share of all Web servers detections.

#	Technology	Websites	Share
1	Nginx	8,387,228	41.7%
2	Apache HTTP Server	5,337,900	26.5%
3	LiteSpeed	2,330,787	11.6%
4	OpenResty	1,207,916	6.0%
5	Next.js	1,032,904	5.1%
6	IIS	743,031	3.7%
7	Express	336,208

Kestrel usage over time

In HTTP Archive's monthly crawl of public websites, Kestrel was detected on 55,725 pages in September 2026, up 6.2% from a year earlier. Among the 1,000 most-visited sites, it appeared on 2. HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.

Same month, other Web Servers technologies in HTTP Archive: Apache HTTP Server 8,652,140, LiteSpeed 3,072,599, IIS 1,189,059, OpenResty 739,473, OpenGSE 396,103.

Kestrel customers by country

Based on country-code domains (such as .de or .co.uk); websites on .com and other generic domains are not assigned a country.

US40
GB28
DE11
NL6
CA6
TR5
IT5
VN5
BR5
NO4

Companies using Kestrel

portswigger.net
fantacalcio.it · Fantacalcio - Solo il meglio del calcio
dell.com
dndbeyond.com · D&D Beyond
tunwalai.com
kiabi.com
cuisineaz.com
zakon.kz
deraktionaer.de · Börsenmedien AG
dukeupress.edu
hdmi.org · Hdmi
streetmap.co.uk

See all 35,569 websites using Kestrel or download the full list as a CSV for $29.

How these numbers are calculated

TechLeads scans public websites and detects Kestrel from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is Kestrel's website count divided by the website counts of all Web servers technologies we track; a site using two Web servers tools counts for both. Counts were last refreshed on October 8, 2026 and update daily.

FAQ

Kestrel accounts for 0.18% of Web servers detections in the TechLeads index (35,569 websites), which makes it the 13th most-used of 81 Web servers technologies we track.