Metal Captcha Alternatives

The worst captcha ever! Forces you to do 10 squats

CAPTCHA that filters out humans and only lets programs pass

Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.

Try for free freemium €29.0 / Monthly

reCAPTCHA is a free security service that protects your websites from spam and abuse.

Replace fire hydrants and traffic lights with your brand.

Captchas don't have to be boring

Open Source

Don't share your email on public sites.

Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.

Create parodies of the iconic O'Reilly book covers

The currency trading game that teaches you forex and stock trading.

GeeTest protects your websites, mobile Apps and APIs from bot threats.

freemium

Spamty is a web service to encrypt an email address and share it on the internet.

Google Search, also referred to as Google Web Search or simply Google, is a web search engine developed by Google. It is the most used search engine on the World Wide Web

Showcasing creative side projects