What powers captcha.com?
Last seen Jun 2026 · 6 technologies across 6 categories
Hosting
Hetzner
since Jan 2023
JavaScript libraries
Operating systems
Debian
since Apr 2018
Programming languages
PHP
since Sep 2021
Security
HSTS
since Sep 2022
Web servers
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| captcha | #45 | 85 |
| captcha with sound | #1 | 64 |
| captcha audio | #1 | 64 |
| audio captcha | #1 | 64 |
| bot captcha | #2 | 29 |
| sample captcha image | #2 | 28 |
| captcha maker | #6 | 20 |
| recaptcha audio | #2 | 15 |
| botdetect captcha | #1 | 8 |
| captcha screenshot | #2 | 6 |
| sample captcha | #6 | 6 |
| captcha generator | #11 | 5 |
| captchas | #87 | 3 |
| captcha pic | #8 | 3 |
| recaptcha test | #93 | 3 |
| captcha samples | #5 | 2 |
| captcha image | #80 | 2 |
| free captchas | #10 | 2 |
| captcha with php | #10 | 1 |
| captcha with contact form 7 | #14 | 1 |
| captcha picture generator | #9 | 1 |
| captcha photos | #10 | 1 |
| captcha in laravel | #8 | 1 |
| captcha generator | #33 | 1 |
| captcha for contact form 7 | #18 | 1 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 72% phone
- 28% desktop
India
Indonesia
Philippines
Iran
Pakistan
Peru
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
5.81 / 10 · ranked #127,284 of all domains
131 referring domains · OpenPageRank
Search traffic
420 est. monthly organic visits (US)
143 keywords in Google's top 30
Core Web Vitals
| LCP | 2.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- Weight: 0.3 MB · 51 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| captcha.com | 6 |
| www.captcha.com | 3 |