Sites built with Ajax Control Toolkit
Open source library of ASP.NET Web Forms UI controls built on Microsoft Ajax.
Get told when a new site ships with Ajax Control Toolkit.
Stackdar watches every launch we detect and sends you the ones using Ajax Control Toolkit, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workFound via: StackScope Wider Web 34
Ajax Control Toolkit has been detected on 34 launches we've crawled, with 19 of those in September 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection was yesterday.
It's most commonly paired with ASP.NET, jQuery, and OpenSeadragon. By domain ending, launches using it are 1.6 times as likely as the average launch to live on a .com domain.
Domain endings using Ajax Control Toolkit
34 sites
- .com 73.53%
- .in 8.82%
- .org 5.88%
- .cz 2.94%
- .de 2.94%
- .net 2.94%
- .xyz 2.94%
Share of new sites using Ajax Control Toolkit
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites.
Amber: on 10 September 2026 we improved our infrastructure so we can 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 that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
UI Library leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Lucide Icons
|
15.81% | 96.47% |
| #2 | – |
shadcn/ui
|
2.91% | 17.76% |
| #3 | – |
Chakra UI
|
0.03% | 0.16% |
| #4 | – |
Flowbite
|
0.02% | 0.13% |
| #5 | ▲1 |
Preline UI
|
0.02% | 0.09% |
| … | ||||
| #27 | ▲16 |
Ajax Control Toolkit
Current page
|
<0.01% | <0.01% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any UI Library tool.Among August launches it ranked #29 in UI Library, up from #45 in July. All 116 in UI Library →
Often used with
| Tool | Sites |
|---|---|
ASP.NET
|
34 |
jQuery
|
31 |
OpenSeadragon
|
21 |
Cloudflare
|
18 |
Google Fonts
|
18 |
Tools most often detected on the same sites as Ajax Control Toolkit.
34 sites across the wider web use Ajax Control Toolkit
None of them is a product launch we list individually, so there is nothing to show here. They still count towards the figures above. How StackScope Discovery works
The StackScope API serves all 34 sites using Ajax Control Toolkit, filterable and exportable, from £15 a month.