Imunify360

hCaptcha is an innovative anti-bot solution that prioritizes user privacy while rewarding website owners. It offers a CAPTCHA service that is more privacy-friendly than traditional options, and provides a unique model where websites can earn revenue from the computational work done by users solving CAPTCHAs.

Cloudflare Turnstile is a smart CAPTCHA alternative designed to provide a more user-friendly and privacy-focused approach to bot detection. It uses non-interactive challenges and machine learning to validate users without requiring them to solve puzzles or identify objects.

DDoS-Guard is a Russian Internet infrastructure company that provides a range of services including DDoS protection, content delivery network (CDN) services, and web hosting. Their solutions help websites and online services maintain availability and performance in the face of distributed denial-of-service attacks.

Slider Captcha is a free service that helps protect websites from spam and abuse.

Friendly Captcha is an innovative proof-of-work based CAPTCHA alternative where the user's device performs computational work to prove humanity. This approach provides effective bot protection while offering a seamless, accessible user experience without traditional CAPTCHA challenges.