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hCaptcha protects user privacy, rewards websites, and helps companies get their data labelled. It is a drop-in replacement for reCAPTCHA: you can switch within minutes. hCaptcha is free to use for publishers of any size. When you use hCaptcha, companies bid on the work your users do as they prove their humanity. You get the rewards. hCaptcha also offers an option to support the charities of your choice with the earnings you gain from using it. The hCaptcha marketplace is powered by the HUMAN Protocol, an open decentralized protocol for human review that runs on the Ethereum blockchain. Websites earn Human Tokens (HMT) whenever users use the hCaptcha widget on their site, and machine learning companies pay Human Tokens to get their data labelled. https://www.hcaptcha.com/