Altcha on new websites

Open-source proof-of-work CAPTCHA alternative; uses a TXT DNS record for domain verification

Sites using Altcha
2,188
since May 2026
Last 30 days
0.0%
of new sites, to Oct 19
no change on the 30 days before
Last 7 days
0.0%
of new sites, 7-day average
no change on the week before
Rank in Security
#9
of 400 tools, all time
First seen May 6, 2026
Last seen Oct 20, 2026
Website altcha.org

What we found

  1. Altcha appeared on about 560 new sites in the last 30 days.[1]
  2. Almost all new Altcha sites also use Svelte.
  3. It is unusually common on .ch domains: 4.9% of the domains running it, against 0.51% of domains across new sites.

Share of new sites using Altcha

0.00% 0.05% 0.10% 0.15% 10 Sep Oct

The line is the 7-day average share of new sites that use Altcha, since 10 September.

Who uses Altcha

Kind of site 512 sites with a known type
TypeSitesShareBar
Health 168 32.8%
E-commerce 54 10.6%
Finance 51 10.0%
Education 38 7.4%
Productivity 33 6.5%
Developer Tools 30 5.9%
Games 30 5.9%
Content 29 5.7%
Marketing 23 4.5%
Social 19 3.7%
Design 12 2.3%
Hiring & HR 9 1.8%
Country[2] 248 sites with a known country
CountrySitesShareBar
Australia 102 41.1%
France 91 36.7%
Switzerland 15 6.1%
Germany 11 4.4%
Brazil 6 2.4%
UK 5 2.0%
US 4 1.6%
Slovakia 3 1.2%
Poland 2 0.8%
Canada 1 0.4%
China 1 0.4%
India 1 0.4%
Domain ending 2,182 sites
EndingSitesShareBar
.au 772 35.4%
.com 599 27.5%
.online 180 8.3%
.fr 107 4.9%
.ch 103 4.7%
.de 58 2.7%
.site 45 2.1%
.org 43 2.0%
.uk 38 1.7%
.store 25 1.2%
.xyz 25 1.2%
.app 18 0.8%

Security on new sites

# Movement Tool Share of all sites Share of category Bar
1 – HSTS 47.5% 87.5%
2 – Cloudflare Bot Management 13.7% 25.2%
3 – Google reCAPTCHA 1.9% 3.5%
4 ▲1 Anubis 0.1% 0.2%
5 ▼2 DDoS-Guard 0.1% 0.2%
…
9 ▲1 Altcha <0.1% 0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Security tool. Altcha is typically used alongside HSTS rather than instead of it. All 400 in Security

Often used with Altcha

Tool Sites with both vs all new sites Bar
VIPsites 948 2759x
Nameserver.net.au DNS 930 256x
Laravel Livewire 951 238x
Unsplash 943 236x
Instagram 944 195x

Tools that turn up far more often on Altcha sites than on new sites in general, and how many times as common each one is there.

Recently launched products built on Altcha

139 of the 2,188 sites using Altcha are product launches we list individually. The other 2,049 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Showing the most recent 12 of 139.

Watches, exports and the API give you all 2,188 sites using Altcha, from £15 a month.

Notes

  1. These figures cover websites that went live since April 2026, not the web as a whole.
  2. 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. We count a country only where it is stated plainly enough to be sure: a governing-law clause or company registration number on a legal page, a phone country code, or a country domain ending. Sites that publish none are not counted at all.

How this page is made

FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards Altcha when we detect Altcha on it at that look.

Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.