What powers captcha.org?
Last seen Jan 2026 · 8 technologies across 7 categories
Analytics
Google Analytics
since Jun 2018
Hosting
Hetzner
since Jan 2023
Operating Systems
Debian
since May 2017
Security
HSTS
since Sep 2022
Web Frameworks
Web Server Extensions
mod_fastcgi
since Apr 2020
Web Servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Open Page Rank
7.59 / 10 · ranked #15,530 of all domains
622 referring domains · OpenPageRank
Infrastructure
- Hosted on Hetzner (188.40.246.97)
- DNS: Hetzner
- Email: no MX record returned
- Common Crawl link graph: rank 1,905,037
DNS records as swept Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| captcha.org | 8 |
| www.captcha.org | 5 |