Sites using Cap (CAPTCHA)
Open-source proof-of-work CAPTCHA alternative using WebAssembly.
Get told when a new site ships with Cap (CAPTCHA).
167 new sites with Cap (CAPTCHA) first seen in the last 30 days.
Stackdar watches every launch we detect and sends you the ones using Cap (CAPTCHA), by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work216 sites
215 found by StackScope, 1 via launch platforms
- StackScope Wider Web 196
- StackScope Discovery (Indie) 19
- Product Hunt 1
Cap (CAPTCHA) has been detected on 216 launches we've crawled, with 139 of those in October 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: Zatuu – Rezepte aus der Community | Schlau kochen, nichts verschwenden, yesterday.
It's most commonly paired with HTTP/3, Google Tag Manager, and Google Analytics. By product type, the launches using it are most often E-commerce (12%), Education (11%), and Health (11%).
What kind of products ship with Cap (CAPTCHA)
74 launches
Domain endings using Cap (CAPTCHA)
216 sites
- .com 56.94%
- .in 19.91%
- .org 2.78%
- .co 2.31%
- .fr 2.31%
- .io 2.31%
- .dev 1.85%
- .live 1.85%
- .de 0.93%
- .net 0.93%
- .online 0.93%
- .ai 0.46%
- .br 0.46%
- .cc 0.46%
- .ch 0.46%
Country
65 of 216 sites, where we are semi-confident of the country.
-
India
67.69%
-
France
9.23%
-
United States
6.15%
-
Germany
3.08%
-
Brazil
1.54%
-
Canada
1.54%
-
Switzerland
1.54%
-
China
1.54%
-
Spain
1.54%
-
United Kingdom
1.54%
-
New Zealand
1.54%
-
Peru
1.54%
-
Sweden
1.54%
Share of new sites using Cap (CAPTCHA)
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026. Chart starts at first detection.
The shaded parts of the chart are measured against a different set of sites.
Grey: until 8 July 2026 we only tracked launches from launch platforms. From that date we crawl the wider web as well.
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 these lines without the technology itself changing. For a single continuous measure, switch to launch platforms.
Captcha leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Cloudflare Turnstile
|
1.16% | 92.36% |
| #2 | – |
hCaptcha
|
0.09% | 6.87% |
| #3 | – |
Friendly Captcha
|
<0.01% | 0.35% |
| #4 | ▲2 | Cap (CAPTCHA) Current page | <0.01% | 0.32% |
| #5 | – |
DS CF7 Math Captcha
|
<0.01% | 0.19% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Captcha tool.Among September launches it ranked #7 in Captcha, up from #9 in August. All 53 in Captcha →
Often used with
| Tool | Sites |
|---|---|
| HTTP/3 | 168 |
Google Tag Manager
|
142 |
Google Analytics
|
136 |
Caddy
|
135 |
WordPress
|
135 |
Tools most often detected on the same sites as Cap (CAPTCHA).
Recent launches we can show
20 of the 216 sites using Cap (CAPTCHA) are product launches we list individually. The other 196 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
Zombies
Games
Overlio · Overlay per streamer Kick: creatività con QR, regia vocale e link in chat
Botillon — La botlist francophone des bots Discord
Social
TaxRelax — Счетоводен софтуер | Един инструмент за всичко
Finance
Sentry — Dashboard de Supervision de Sécurité en Temps Réel
TKDS LMS — Launch Your Own Online Academy in Days, Not Months
Education
Captions · Småverk
Content
Muster Fleet · Fleet tracking without the traps
SEREON AI: Multilingual AI Front Office for Every Business | VizzaroAI
Sichtbar für KI — Wie sehen ChatGPT & Co. deine Marke?
AI
Miacota — AI models paid in crypto. No email, no KYC.
Crypto
Showing the most recent 12 of 20.
The StackScope API serves all 216 sites using Cap (CAPTCHA), filterable and exportable, from £15 a month.