🆚 Cap vs. Friendly Captcha
Cap
Friendly CaptchaType
About
Cap is an open-source, self-hosted 
reCAPTCHA alternative that verifies visitors without visual puzzles, tracking, or third-party services.
It uses a two-layer verification model that combines proof-of-work challenges accelerated with 
WebAssembly and Web Workers, including SHA-256 hashing and optional GPU-resistant time-locks.
Friendly Captcha is a European captcha service that protects websites from bots and automated abuse while prioritizing user privacy, security, and accessibility.
It uses a proof-of-work approach that runs in the background without image challenges or tracking cookies, complies with GDPR by avoiding personal data collection, works without user interaction in most cases, and supports 
WCAG accessibility requirements.
Headquarters
Pricing
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
Awards
- ⭐ 4th most popular in Germany in the Captchas category.
- ⭐ 4th most popular in Austria in the Captchas category.
- ⭐ 4th most popular in the Netherlands in the Captchas category.
- ⭐ 5th most popular in Germany in the Spam Protection category.
- ⭐ 5th most popular in Austria in the Spam Protection category.
Popularity by domain category
Determined by the number of sites in each category.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
hCaptcha
Cloudflare Turnstile
Yandex SmartCaptcha
Altcha🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,604,716 websites. However, data for Cap is still being collected and reflects a smaller subset of sites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.