Friendly Captcha by Friendly Captcha is a bot protection service designed to protect websites and online services from spam and abuse. It uses proof-of-work mechanisms and advanced risk signals to defend against automated attacks while maintaining user privacy and accessibility. The system operates invisibly in the background, requiring no user interaction to solve challenges. It employs cryptographic puzzles that are automatically solved by the user's device, often completing before form submission. The system generates a risk score and can dynamically adjust puzzle difficulty based on advanced risk signals.
