Kestrel on new websites
Cross-platform web server for ASP.NET Core.
2,526 sites
2,445 found by StackScope, 81 via launch platforms
- StackScope Wider Web 1,798
- StackScope Discovery (Indie) 647
- Product Hunt 61
- Other 11
- PeerPush 5
- Hacker News 4
Kestrel appeared on about 990 new sites in the last 30 days.
These figures cover websites that went live since April 2026, not the web as a whole.
Get told when a new site ships with Kestrel.
985 new sites with Kestrel first seen in the last 30 days.
Stackdar watches every launch we detect and sends you the ones using Kestrel, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workShare of new sites using Kestrel
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026.
The shaded areas were measured against a different set of sites, so the line can step there without Kestrel itself changing.
Coverage details
Before the dashed line where the dots begin, the line is a weekly average. After it, the last 90 days are shown one day at a time.
Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time. For a single continuous measure, switch to launch platforms.
What kind of sites use Kestrel
821 sites with a known type, all time
Domain endings using Kestrel
2,517 sites, all time
- .com 59.2%
- .app 5.6%
- .net 4.2%
- .uk 3.5%
- .online 2.9%
- .org 2.5%
- .ai 1.8%
- .in 1.7%
- .io 1.6%
- .dev 1.4%
- .xyz 1.2%
- .fr 1.1%
- .se 1.1%
- .co 1.1%
- .ca 1.0%
Country
Country likely for 372 of 2,526 sites (14.7%), all time.
How we know
Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
-
United Kingdom
23.7%
-
Canada
11.8%
-
India
10.0%
-
France
8.1%
-
United States
8.1%
-
Sweden
6.7%
-
Türkiye
6.2%
-
Switzerland
3.5%
-
Germany
3.0%
-
New Zealand
1.9%
-
Slovakia
1.9%
-
Australia
1.6%
-
Brazil
1.6%
-
South Korea
1.3%
-
Czechia
0.8%
Green hosting
80 checked sites since Apr 2026.
What this means
The share whose web host The Green Web Foundation lists as running on green energy, against the average for every new site we checked.
- Kestrel 31%
- Average 47%
Server leaders
| Tool | % of sitesall time | % of categoryall time | ||
|---|---|---|---|---|
| #1 | – |
nginx
|
9.5% | 37.3% |
| #2 | – |
LiteSpeed Web Server
|
6.6% | 26.0% |
| #3 | – |
Apache
|
4.7% | 18.2% |
| #4 | – |
Caddy
|
3.0% | 11.6% |
| #5 | – |
OpenResty
|
0.9% | 3.5% |
| … | ||||
| #12 | ▲1 |
Kestrel
Current page
|
<0.1% | 0.2% |
Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any Server tool. All 140 in Server →
Often used with
| Tool | Sites | vs all new sites |
|---|---|---|
Azure Application Insights
|
502 | 647x |
Blazor
|
504 | 422x |
Azure App Service
|
452 | 336x |
|
Caddy
|
569 | 7.6x |
Bootstrap
|
447 | 4.1x |
Tools that turn up far more often on Kestrel sites than on new sites in general, and how many times as common each one is there.
Recent launches using Kestrel
728 of the 2,526 sites using Kestrel are product launches we list individually. The other 1,798 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts. How StackScope Discovery works
Coverage · Linked Art in C#
Also detected
Pocchito | 毎日に、ちょっと余白を。
Also detected
묵찌빠 Muk-jji-ppa
Also detected
온챗 · 모든 사이트에 1줄로 추가하는 라이브 채팅
Also detected
Zomi
Also detected
StoryLove - Nền tảng thiết kế thiệp cưới online & thiệp mời điện tử miễn phí
Also detected
Agenda en línea para tu negocio · ServiCitas
Also detected
Tiny Touchdown — Jeu de football américain sur mobile
Also detected
Belayr: a safety check-in timer for walks, dates and showings
Also detected
Territory Clash
Also detected
Samielle Studio · Invitaciones digitales
Also detected
Showing the most recent 12 of 728.
The StackScope API serves all 2,526 sites using Kestrel, filterable and exportable, from £15 a month.